|
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures. ? The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small pump in a lab. ? The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web. ? I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping. ? Thanks for looking and very best ? John ?
|
John,?
Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
toggle quoted message
Show quoted text
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures.
?
The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small
pump in a lab.
?
The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web.
?
I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple
of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the
actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping.
?
Thanks for looking and very best
?
John
?
|
|
|
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.??
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote:
John,?
Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures.
?
The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small
pump in a lab.
?
The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web.
?
I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple
of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the
actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping.
?
Thanks for looking and very best
?
John
?
|
I lived in Basking Ridge, NJ many years ago, across the street from the AT&T headquarters (well, half mile off, anyway).?
There are no advantages living therin that state. It is expensive, crowded, roads are bad, you are taxed to hell and back and worst of all NYC is nearby. The taxes for my 1949 home were $15,000 a year and the house was poorly designed, in my opinion. New, well-designed
homes are untouchable by mere mortals.?
toggle quoted message
Show quoted text
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In
good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.??
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better
On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote:
John,?
Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures.
?
The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.?
This was used to run a small pump in a lab.
?
The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web.
?
I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop
but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS
if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping.
?
Thanks for looking and very best
?
John
?
|
They look to be in good shape. My TECO is an older model of the L510, and missing the cover. It was only $50 on Ebay late 2019 or early 2020, IIRC. Pretty sure I can fold some aluminum sheet to replace the cover.?
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
On Wednesday, March 1, 2023 at 10:09:34 AM CST, John Fischer <n2nu@...> wrote:
That’s the standard apple IOS format of pictures – dang iphone…. ? Try these ? -John ?
|
Ouch! ? At least one I can think of…. Will-Call at McMaster-Carr, though I think available in a couple of other places too. ? Best John ?
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Andrei Sent: Wednesday, March 1, 2023 11:32 AM To: [email protected]Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines ? I lived in Basking Ridge, NJ many years ago, across the street from the AT&T headquarters (well, half mile off, anyway).? There are no advantages living therin that state. It is expensive, crowded, roads are bad, you are taxed to hell and back and worst of all NYC is nearby. The taxes for my 1949 home were $15,000 a year and the house was poorly designed, in my opinion. New, well-designed homes are untouchable by mere mortals.?
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.?? William R. Meyers, MSgt, USAF(Ret.) Good judgement comes from experience. Experience comes from bad judgement.? Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better ? On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote: Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures. ? The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small pump in a lab. ? The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web. ? I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping. ? Thanks for looking and very best ? John ?
|
I've got a Grainger's local to me, so can mostly live without McMaster-Carr. ;) My 3rd stepfather was from Camden. Only thing he missed from there were TastyKakes. His brother would visit once or twice a year, and would bring some for Tom. I've seen them here in OKC, fairly recently, but I'm a dedicated Hostess fan. ;) And do NOT need anymore fat in my diet. :)
If I lived out that way, and had the $$, I'd be coming to see you!?
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
On Wednesday, March 1, 2023 at 10:38:21 AM CST, John Fischer <n2nu@...> wrote:
Ouch! ? At least one I can think of…. Will-Call at McMaster-Carr, though I think available in a couple of other places too. ? Best John ?
From: [email protected] < [email protected]> On Behalf Of Andrei Sent: Wednesday, March 1, 2023 11:32 AM To: [email protected]Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines ? I lived in Basking Ridge, NJ many years ago, across the street from the AT&T headquarters (well, half mile off, anyway).? There are no advantages living therin that state. It is expensive, crowded, roads are bad, you are taxed to hell and back and worst of all NYC is nearby. The taxes for my 1949 home were $15,000 a year and the house was poorly designed, in my opinion. New, well-designed homes are untouchable by mere mortals.?
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.?? William R. Meyers, MSgt, USAF(Ret.) Good judgement comes from experience. Experience comes from bad judgement.? Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better ? On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote: Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures. ? The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small pump in a lab. ? The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web. ? I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping. ? Thanks for looking and very best ? John ?
|
That's why I put a Bergerda 1.8kW AC Servo on my milling machine.? Cost of 2HP (1.5kW) and good VFD was way more and I shared the FedEx shipping over two motors; the other a 750W AC servo for the knee.? And overall height was lowered by 3.75" and RPM and positioning was now possible. ? Here's a video of the G-Code and the spindle seeking to the home position.
? More fun than a human should be allowed to have. ? John ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Bill in OKC too via groups.io
Sent: March-01-23 8:25 AM
To: [email protected]
Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines? If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.?? William R. Meyers, MSgt, USAF(Ret.) Good judgement comes from experience. Experience comes from bad judgement.? Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better ? On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote: Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached pictures. ? The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.? This was used to run a small pump in a lab. ? The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web. ? I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping. ? Thanks for looking and very best ? John ?
|
hey andrei
you were only a few miles from the new jersey live steamers - did you ever get over there
fred
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Show quoted text
I lived in Basking Ridge, NJ many years ago, across the street from the AT&T headquarters (well, half mile off, anyway).?
There are no advantages living therin that state. It is expensive, crowded, roads are bad, you are taxed to hell and back and worst of all NYC is nearby. The taxes for my 1949 home were $15,000 a year and the house was poorly designed, in my opinion. New, well-designed
homes are untouchable by mere mortals.?
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In
good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.??
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better
On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote:
John,?
Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached
pictures.
?
The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.?
This was used to run a small pump in a lab.
?
The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web.
?
I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop
but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS
if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping.
?
Thanks for looking and very best
?
John
?
|
No Fred. Never made it. In those days my main hobby(ies) was (were) photography and astronomy. Then the newborn ate all my money and all my time.?
toggle quoted message
Show quoted text
hey andrei
you were only a few miles from the new jersey live steamers - did you ever get over there
fred
I lived in Basking Ridge, NJ many years ago, across the street from the AT&T headquarters (well, half mile off, anyway).?
There are no advantages living therin that state. It is expensive, crowded, roads are bad, you are taxed to hell and back and worst of all NYC is nearby. The taxes for my 1949 home were $15,000 a year and the house was poorly designed, in my opinion. New, well-designed
homes are untouchable by mere mortals.?
If you're using a Microsoft OS, you have to download the .heic stuff from the Microsoft store for $0.99. I don't need to see them that bad. A new Baldor 1/2hp motor runs around $700, TECO VFD 1/2hp, new, is about $275. In
good shape, lightly used, $300 sounds fair to me. Too bad I can't afford it! Though I'm happy I don't live in New Jersey. Finding good motors out here doesn't seem to be all that easy, but there are other compensations.??
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better
On Wednesday, March 1, 2023 at 09:59:03 AM CST, Andrei <calciu1@...> wrote:
John,?
Not sure what those .HEIC attachments are, but I could not open them. Do you have PDF or JPG versions, instead?
For someone that needs a good variable speed, reversable setup, I am offering a Baldor IDXM7006 inverter duty ? HP motor and TECO Westinghouse L510-101-H1-U Variable Frequency Drive for sale.? See attached
pictures.
?
The motor is ?230/460V 3 phase, frame 56C, “explosion proof”, ball bearing, 1735RPM at 60Hz, made in USA and is used but excellent shape.? There are minor scratches and scuffs on the paint, no dings or dents.?
This was used to run a small pump in a lab.
?
The inverter is 110v input, ? HP, again in excellent condition – I would say it almost looks new.? I do not have the manual, but it is available online from numerous sources on the web.
?
I purchased both of these for my employer, so I know their history of very light use.? When they no longer were needed, I was able to save them from the junk pile.? I was planning to use the combo in my shop
but they have sat for a couple of years, and I need to reclaim some space.? I am offering the combo to this group first for a price of $300.? I am located in central NJ and would prefer to not have to ship, as the motor weighs 39 lbs, but will ship via UPS
if you are willing to pay the actual cost which I think could be around $100 depending on distance.? I’ll give first priority to local pickup, but if I get no takers, I will keep your info and sell to the first person who needs shipping.
?
Thanks for looking and very best
?
John
?
|
I'm not within pickup distance, but I am interested in doing a VFD conversion on both my lathe and mill.
I have been totally unable to find any real numbers on the useful frequency or RPM range a setup like this would give me.
Can you point me to any online resources that would help me specify a motor/drive combo for my lathe?
How much and how quickly does torque fall off when you veer off the 60hz the motor is designed for?
What exactly does 'Inverter Duty' mean? does this give a wider useful speed range?
How about stator cooling? I've seen some installations where the builder grafted a computer muffin fan to the end bell of the motor for better cooling at low speed. I have not seen this specified in any available motor, even those that claim 'inverter rated'.
I know, I ask too many questions... I've heard that many times before.
--
Rick Green
|
Hey Rick
Inverter duty motor is designed to work with an inverter, and therefore is
typically able to work over a much wider speed range, i.e. will work at
lower speed without needing to supplement the cooling as you have described.
Take a look at the nameplate picture and note motor will run constant torque
or variable torque from 6 to 60 Hz, since speed is proportional to
frequency, that is a 10x range. It is rated constant HP from 60 to 90Hz.
Max speed is 2700 RPM, which would be a little over 90Hz. Minimum speed 6 Hz
is 144 RPM.
Generally speaking, if you reduce speed by 1/2, you reduce HP by 1/2 as
well. This imposes some practical limits on speed range for machine tools
as compared to say a fan or pump. So, on your machine, you still want to
use speed reduction pulleys, back gear, etc. if you are trying to make it do
hard work at low speeds. I find that on a milling machine, I can use a very
wide speed range on the VFD, because I am typically using a small cutter. I
would expect on a lathe, the range may be more limited.
All in all I like using VFDs on my tools, and I have several, but don't
expect that you will never need to shift down. In conjunction with back
gear, you can go really slow on lathe for things like winding coils or
threading to a shoulder.
I am sure that people smarter than I will have something to say about my
simplistic explanation, but I hope it helps...
Best
John
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Richard Green Sent: Wednesday, March 1, 2023 2:19 PM To: [email protected]Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines I'm not within pickup distance, but I am interested in doing a VFD conversion on both my lathe and mill. I have been totally unable to find any real numbers on the useful frequency or RPM range a setup like this would give me. Can you point me to any online resources that would help me specify a motor/drive combo for my lathe? How much and how quickly does torque fall off when you veer off the 60hz the motor is designed for? What exactly does 'Inverter Duty' mean? does this give a wider useful speed range? How about stator cooling? I've seen some installations where the builder grafted a computer muffin fan to the end bell of the motor for better cooling at low speed. I have not seen this specified in any available motor, even those that claim 'inverter rated'. I know, I ask too many questions... I've heard that many times before. -- Rick Green
|
On Wed, 1 Mar 2023, John Fischer wrote: Hey Rick
Inverter duty motor is designed to work with an inverter, and therefore is
typically able to work over a much wider speed range, i.e. will work at
lower speed without needing to supplement the cooling as you have described.
Take a look at the nameplate picture and note motor will run constant torque
or variable torque from 6 to 60 Hz, since speed is proportional to
frequency, that is a 10x range. It is rated constant HP from 60 to 90Hz.
Max speed is 2700 RPM, which would be a little over 90Hz. Minimum speed 6 Hz
is 144 RPM.
Generally speaking, if you reduce speed by 1/2, you reduce HP by 1/2 as
well. This imposes some practical limits on speed range for machine tools
as compared to say a fan or pump. So, on your machine, you still want to
use speed reduction pulleys, back gear, etc. if you are trying to make it do
hard work at low speeds. I find that on a milling machine, I can use a very
wide speed range on the VFD, because I am typically using a small cutter. I
would expect on a lathe, the range may be more limited.
All in all I like using VFDs on my tools, and I have several, but don't
expect that you will never need to shift down. In conjunction with back
gear, you can go really slow on lathe for things like winding coils or
threading to a shoulder.
I am sure that people smarter than I will have something to say about my
simplistic explanation, but I hope it helps...
Best
John
Thanks. That's the best explanation I've ever heard. My problem is that the motors I've found available, don't have that kind of info on their rating plates. for example: I want to set up my mill first. It's a small round-column mill/drill of the 'Rong Fu' variety, branded as a 'Lincoln RF-20'. Changing speeds with the belts is a major PITA, and with the offset idler pulley, it places the front belt directly above the clearance hole in the head casting. I'm in the process of implementing some upgrades to the mill. I'm fabricating a riser block for the column, which will regain the Z travel lost with the installation of a vise, and also mount the lower end of a stabilizer bar to prevent rotation when the head is raised or lowered. To increase the utility of the Z travel, I plan on installing a scale for my DRO on the Z axis, within the clearance hole in the head, with the scale anchored to the quill stop bracket, and the read head anchored to the column at the top. In this way, the DRO will measure the tool position regardless of quill or head movement. This is why I want to eliminate that side idler pulley, so the single belt will go around the column, leaving the clearance hole obstruction free. With a 15:1 speed range available from a VFD, I might get away with a single sheave belt drive. I was hoping for 20:1, but then, I'm a dreamer, right? I'll look into designing a double-sheave arrangement that would stretch my spindle speed from 150 to 3000RPM. -- Rick Green
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Rick
Been there... Why not keep the existing pulley set-up, and use the VFD to
fill in gaps/avoid shifting unless needed. Usually when you are at the low
end of speed range, you are working with bigger cutters/drills and need
additional torque that the pulleys can give you but the VFD cannot. As a
demo, I once had a shop teacher put a 2x4 in a lathe chuck sticking out so
the 4 inch dimension would hit the casting by the ways. He put the back
gear on and started the lathe. 2x4 was sheared without any effort by the
lathe. Point was to demo so that students would respect the machine, but
also gave an idea of how much torque the machine could develop.
On a mill drill like that, I have found speeds that just don't work with a
given setup, and to be able to tweak with the VFD might help avoid
resonances and other issues.
To your point of motors, you are never going to be able to get specs or
support on a motor like that, so if you use one, I would not design like it
is going to work across such a wide range. I would never want to be without
very low speeds for things like drilling a large hole using a hole saw or
fly cutter.
-J
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Richard Green Sent: Friday, March 3, 2023 1:01 PM To: [email protected]Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines Thanks. That's the best explanation I've ever heard. My problem is that the motors I've found available, don't have that kind of info on their rating plates. for example: I want to set up my mill first. It's a small round-column mill/drill of the 'Rong Fu' variety, branded as a 'Lincoln RF-20'. Changing speeds with the belts is a major PITA, and with the offset idler pulley, it places the front belt directly above the clearance hole in the head casting. I'm in the process of implementing some upgrades to the mill. I'm fabricating a riser block for the column, which will regain the Z travel lost with the installation of a vise, and also mount the lower end of a stabilizer bar to prevent rotation when the head is raised or lowered. To increase the utility of the Z travel, I plan on installing a scale for my DRO on the Z axis, within the clearance hole in the head, with the scale anchored to the quill stop bracket, and the read head anchored to the column at the top. In this way, the DRO will measure the tool position regardless of quill or head movement. This is why I want to eliminate that side idler pulley, so the single belt will go around the column, leaving the clearance hole obstruction free. With a 15:1 speed range available from a VFD, I might get away with a single sheave belt drive. I was hoping for 20:1, but then, I'm a dreamer, right? I'll look into designing a double-sheave arrangement that would stretch my spindle speed from 150 to 3000RPM. -- Rick Green
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On Fri, 3 Mar 2023, John Fischer wrote: Rick
Been there... Why not keep the existing pulley set-up, and use the VFD to
fill in gaps/avoid shifting unless needed. Part of my plan is to remove the obstruction to the central hole in the head casting so I can install the combined Head/Quill Z axis scale there. To your point of motors, you are never going to be able to get specs or
support on a motor like that, so if you use one, I would not design like it
is going to work across such a wide range. I would never want to be without
very low speeds for things like drilling a large hole using a hole saw or
fly cutter. TAANSTAFL! At ~$200 vs. $$800+, I realized I must be dreaming. Is there any middle ground between Baldor and no-name import??? The mill now has a 1HP single-phase motor. I was hoping that using a 2HP motor with a 2HP VFD would compensate for the fall-off in torque at lower speeds. :-) -- Rick Green
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My problem is that the motors I've found available, don't have that kind of
info on their rating plates. for example:
I want to set up my mill first. It's a small round-column mill/drill of the
'Rong Fu' variety, branded as a 'Lincoln RF-20'. Changing speeds with the belts
is a major PITA, and with the offset idler pulley, it places the front belt
directly above the clearance hole in the head casting.
I'm in the process of implementing some upgrades to the mill. I'm fabricating
a riser block for the column, which will regain the Z travel lost with the
installation of a vise, and also mount the lower end of a stabilizer bar to
prevent rotation when the head is raised or lowered.
To increase the utility of the Z travel, I plan on installing a scale for my
DRO on the Z axis, within the clearance hole in the head, with the scale
anchored to the quill stop bracket, and the read head anchored to the column at
the top. In this way, the DRO will measure the tool position regardless of
quill or head movement. This is why I want to eliminate that side idler pulley,
so the single belt will go around the column, leaving the clearance hole
obstruction free.
With a 15:1 speed range available from a VFD, I might get away with a single
sheave belt drive. I was hoping for 20:1, but then, I'm a dreamer, right? I'll
look into designing a double-sheave arrangement that would stretch my spindle
speed from 150 to 3000RPM.
--
Rick Green Hi Rick, As I've probably said before I had the same issue and couldn't find an inexpensive 3 phase 2HP motor and VFD combination. Since I wanted an AC servo to replace the non-functional DC Brushed Servo from Automation Technologies (it was too old for warranty) and the AC Servo from Bergerda was cheaper than the identical replacement I added a 1.8kW AC servo for my mill spindle. I can do positioning with it: I can power tap with it. First try at tapping a hole in a piece of oak. And attached is the install with the new AC Servo moved over where the intermediate pulley was. I haven't needed to change the belt to the smaller pulley. Just a suggestion. John
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Chinesium motors and full and accurate data cannot be used in the same sentence. Go for the big names and you will be fine. Baldor, Leeson, etc. You will pay the price, though, unless you go to auctions.?
One time I bought 8 Leeson motors on a pallet at auction. I only needed one. Took me a year to get rid of the others, but in the end I got a free motor. I don't recommend that to our married members, or at least hide the shotguns before you make such a foolish
purchase.?
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>??? My problem is that the motors I've found available, don't have that kind of
> info on their rating plates. for example:
>
>
> I want to set up my mill first.? It's a small round-column mill/drill of the
> 'Rong Fu' variety, branded as a 'Lincoln RF-20'.? Changing speeds with the belts
> is a major PITA, and with the offset idler pulley, it places the front belt
> directly above the clearance hole in the head casting.
>??? I'm in the process of implementing some upgrades to the mill.? I'm fabricating
> a riser block for the column, which will regain the Z travel lost with the
> installation of a vise, and also mount the lower end of a stabilizer bar to
> prevent rotation when the head is raised or lowered.
>??? To increase the utility of the Z travel, I plan on installing a scale for my
> DRO on the Z axis, within the clearance hole in the head, with the scale
> anchored to the quill stop bracket, and the read head anchored to the column at
> the top.? In this way, the DRO will measure the tool position regardless of
> quill or head movement.? This is why I want to eliminate that side idler pulley,
> so the single belt will go around the column, leaving the clearance hole
> obstruction free.
>??? With a 15:1 speed range available from a VFD, I might get away with a single
> sheave belt drive.? I was hoping for 20:1, but then, I'm a dreamer, right?? I'll
> look into designing a double-sheave arrangement that would stretch my spindle
> speed from 150 to 3000RPM.
>
> --
> Rick Green
Hi Rick,
As I've probably said before I had the same issue and couldn't find an inexpensive 3 phase 2HP motor and VFD combination.? Since I wanted an AC servo to replace the non-functional DC Brushed Servo from Automation Technologies (it was too old for warranty) and
the AC Servo from Bergerda was cheaper than the identical replacement I added a 1.8kW AC servo for my mill spindle.?
I can do positioning with it:
I can power tap with it.? First try at tapping a hole in a piece of oak.
And attached is the install with the new AC Servo moved over where the intermediate pulley was.? I haven't needed to change the belt to the smaller pulley.
Just a suggestion.
John
?
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Andrei, I'm not sure I'd make that such a general statement.? Like everything there are reliable and honest suppliers and less than that too. ? I've found dealing directly with Bergerda for purchase and support second to none including their engineers even sending me a cell phone video on some configuration setup. OTOH, the complaint from Bergerda, and it's a fair one, is the companies that buy in bulk and then resell on AliExpress but provide no support are a big pain in the rear.? Bergerda ends up supporting motors purchased from others at a low price but end up providing free support.? They can't afford that either. ? With that in mind Bergerda would like to set up a North American Distributor, who would get low prices and surface shipping costs with the idea that service would be supplied locally.? I would do it but shipping from Canada into the USA is worse than shipping from China to North America.? In fact shipping even by post in Canada is more expensive than shipping by post from China. ? If anyone knows someone who would like to become a servo/stepper motor supplier in North America let me know and I'll pass on a name. ? John ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Andrei
Sent: March-03-23 12:02 PM
To: [email protected]
Subject: Re: [SouthBendLathe] FS: Baldor Motor and TECO drive combo for your lathe or other machines? Chinesium motors and full and accurate data cannot be used in the same sentence. Go for the big names and you will be fine. Baldor, Leeson, etc. You will pay the price, though, unless you go to auctions.?
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Hi John,
I agree with you. When I say Chinesium, I am talking about the myriad of no-name clones that have wildly creative performance specifications that don't have anything in common with reality.?
There are definitely quality products and providers in China. After all, 100% of iPhones are made there, and nobody complains about them.
I was looking at Bergerda a while back, but never followed through. If yuo don't mind, can you share some of your project? It would be great to see it.?
Hmmm, Bergerda North American distributor. That sounds good. I wonder what kind of outlay would be required. I am not rich, but I am willing to be adopted by rich people, or find me a sugar mama.?
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Andrei,
I'm not sure I'd make that such a general statement.?
Like everything there are reliable and honest suppliers and less than that too.
?
I've found dealing directly with
Bergerda for purchase and support second to none including their engineers even sending me a cell phone video on some configuration setup.
OTOH, the complaint from
Bergerda, and it's a fair one, is the companies that buy in bulk and then resell on
AliExpress but provide no support are a big pain in the rear.?
Bergerda ends up supporting motors purchased from others at a low price but end up providing free support.?
They can't afford that either.
?
With that in mind
Bergerda would like to set up a North American Distributor, who would get low prices and surface shipping costs with the idea that service would be supplied locally.?
I would do it but shipping from Canada into the USA is worse than shipping from China to North America.?
In fact shipping even by post in Canada is more expensive than shipping by post from China.
?
If anyone knows someone who would like to become a servo/stepper motor supplier in North America let me know and I'll pass on a name.
?
John
?
?
?
Chinesium motors and full and accurate data cannot be used in the same sentence. Go for the big names and you will be fine. Baldor,
Leeson, etc. You will pay the price, though, unless you go to auctions.?
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Bill in OKC too
