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Re: DC Motor for unimat SL
I know at least one person fitted a Unimat SL (IIRC) as a CNC machine, but I don't know if they used a stepper on the spindle. John Dammeyer has done something he calls an Electronic Lead Screw, that controls the leadscrew, and uses a 1PPR sensor on the spindle to allow threading, and even tapering without a QCGB or even change gears. Seems to me he's put servo motors on the spindle of some of his machines. His device was designed in 2007, so many of the parts are no longer available,? but he's working on a more modern version that uses a PIC32 controller. Higher resolution sensors are available for spindles, now, too.? There are several other ELS systems as well. Clough42 on Youtube has one, and there are a couple of? others on Groups.io, as well. Some of the folks at Digital Hobbyist are doing something similar for the mini-lathes and mini-mills.? William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 11:25:27 AM CDT, Carl <carl.blum@...> wrote:
Hi Gang: Has anyone tried fitting a stepping motor to the Unimat? I put one on my trail lift, and during the set up I loaded the "sketches" for speed control in the Arduino. It looks like it could be a full torque motor at any speed. Of course the next step would be mounting it with a timing belt, adding a stepper to the lead screw so you could do CNC threading! Carl. |
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Re: What on earth are these?
Yep. Long, long, ago, and far, far away, and in another universe, I was seriously interested in becoming a jewelry maker. Long story short, it didn't work out. I've done some minor repairs, and occasionally add another jewelry making tool or material to the project stash, but haven't done anything else about it in several decades. I've finally learned enough to make such things. But the metal to do it right would cost a great deal more than one of the import sets. At age 68, for the little use I'd get out of them, it would give me something to do, but cost way more than a quick trip to Harbor Freight. ;) If the situation changes, and I luck upon a larger stash of materials, I might just rethink the whole deal, but a .5x2x12 inch piece of 4140 steel just cost me $45 and change. I might have enough drill rod (silver steel for those in the UK) to do such a project, but I have other plans for that materiel, too! Choices, choices!? 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! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, September 21, 2023 at 11:23:35 AM CDT, Nick Clarke <nickc@...> wrote:
They are used to tap thin metal down into a block like this ? ? Or onto a rubber and steel pad ? ? Nick ? From: [email protected] [mailto:[email protected]] On Behalf Of Peter Brooks ? Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related. |
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Re: DC Motor for unimat SL
¿ªÔÆÌåÓýHi Gang: Has anyone tried fitting a stepping motor to the Unimat? I put one on my trail lift, and during the set up I loaded the "sketches" for speed control in the Arduino. It looks like it could be a full torque motor at any speed. Of course the next step would be mounting it with a timing belt, adding a stepper to the lead screw so you could do CNC threading! Carl. |
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Re: What on earth are these?
¿ªÔÆÌåÓýThey are used to tap thin metal down into a block like this ? ? Or onto a rubber and steel pad ? ? Nick ? From: [email protected] [mailto:[email protected]] On Behalf Of Peter Brooks ? Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related. |
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Re: Off Topic measuring units
Which system? 100¡ãF is lukewarm, or just a bit over average body temperature. 100¡ãC is boiling water. Neither is perfect for a drink. IMO, anyway! :) I'm not much of a whiskey drinker, but if you're buying something better than rotgut, you may just want to drink it at 100¡ãF, since that will give you the best flavor. And at?100¡ãC Whiskey is going to be mostly flammable vapor and a bit of boiling water...? ;) Once upon a time, a friend held a wake for his grandmother, who had just passed. He served 50 YO Macallan Scotch whiskey. And it was the only alcoholic beverage I've ever REALLY liked. Less than a year ago, I considered perhaps starting to drink something like that again. The 15 YO Macallan I could get on base tax-free was $115 for a 750ml bottle. Decided, once again, that I cannot afford any more expensive hobbies. Gotta save all my money for machine tools and metals... ;) 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! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 11:35:37 AM CDT, carlos vasco <carles.vasco@...> wrote:
I may disagree, 0 is the temperature of your perfect whiskey, 100 your perfect tea! Carlos On Tue, 19 Sept 2023 at 16:39, Carl <carl.blum@...> wrote:
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Re: DC Motor for unimat SL
Dave, either will be more powerful than the stock motors. I've seen someone on one of the 7x mini-lathe groups put a 3hp treadmill? motor on a 7x Mini-lathe. The only problems you'd have doing that are fitting the thing, and getting the speeds you need, and what can happen if you crash the machine. ?A smaller motor should be a bit easier to mount, though you might still have problems getting the speeds you need, and it won't do as much damage if you crash it.? They make 600watt and larger scooter motors, too, if you really want to go that way. I believe the reason so many folks go for the 150watt motors is that they're so readily available, and still reasonably cheap, while being unlikely to do serious damage.? When I got mine, they were up to around $30, where the 600watt motor was around $60 or so. I think the folks I bought my motor from now want about $50. I didn't want to go crazy with the horsepower, but did want something that could work as long as I could stand to work on it. If the 120watt motors had been either a lot more available or a lot cheaper, I'd probably have gone for them.? The stock motors are 90 or 100 watts. 1.5 or 2x the power seems more reasonable to me than 6x or more. But the guy who put the 3HP treadmill motor on his mini-lathe was happy with it the last I heard. And those are usually rated for a 1/3 HP to 2/3 HP or so. 250 or 500 watts. And my South Bend Heavy 10L toolroom lathe came from the factory with a 3/4 HP motor. 1HP is about 746 watts.? As they say, "You pay your money, and you take your chances." And availability trumps a lot of other factors! HTH William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 07:03:34 AM CDT, David James via groups.io <davebjames@...> wrote:
All the conversions I've seen everyone is using the 24v DC x 150W scooter motor. I can only find a 24v DC x120W motor locally and ordering online to the island of Borneo takes for ages and costs an arm and a leg. My question is would the 120W scooter motor do the job or do I need the 150W version? Dave |
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Re: What on earth are these?
¿ªÔÆÌåÓýThey are Dapping /Doming punches .?
From: [email protected] <[email protected]> on behalf of Bill in OKC too via groups.io <wmrmeyers@...>
Sent: Tuesday, September 19, 2023 9:55:47 PM To: [email protected] <[email protected]> Subject: Re: [Unimat] What on earth are these? ?
? though I searched as dapping
block set
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 12:20:35 PM CDT, Charles Kinzer <ckinzer@...> wrote:
I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be
offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:
Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts
Regards,
Adrian
On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:
That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?
A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?
From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM To: [email protected] <[email protected]> Subject: [Unimat] What on earth are these? ?
Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related.
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Re: What on earth are these?
toggle quoted message
Show quoted text
-------- Original message -------- From: Peter Brooks <peter@...> Date: 19/09/2023 18:01 (GMT+00:00) Subject: [Unimat] What on earth are these? |
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Re: Tips on machining pulley grooves
when i needed pulley grooves on the motor i now use on my unimat 3 it was a simple as firing up the motor and attacking the gear on the end of the shaft with a round file until it was deep enough for the? belt.
------ Original Message ------
From "Tool247" <Sjkochan@...>
Date 20/09/2023 13:13:40
Subject Re: [Unimat] Tips on machining pulley grooves
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Re: Tips on machining pulley grooves
You could try something completely different.? I actually did this myself on my old south bend lathe. You could mount a router or dremel type tool and put a ball type cutter in it and plunge while rotating the head stock slowly or by hand. Then you can sharpen a form cutter razor sharp and do your final .005 or .010". You can probably do 0.010 - 0.020 depth of cuts on solid stock or plunge with a cutoff tool then mill with the router then finish with the form tool. I created an 8" dia aluminum drum approx 12 inches long with a 0.25" pitch cable groove by engaging the threading (a bit jury rigged) on that lathe. My U3 I am sure I could employ similar methods for straight grooves. On Sat, Sep 16, 2023 at 4:12?PM Peter Brooks <peter@...> wrote:
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Re: What on earth are these?
That is true, for sure. And they may have been purchased for one, and used for the other, for that matter. I may never make the set I wanted, since the metal will cost more than a set from HF.? 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! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 09:35:05 PM CDT, Charles Kinzer <ckinzer@...> wrote:
I think it may be unknowable whether these were purchased for jewelry making or machinist inspection purposes. Again, ones that look identical are sold by machinery supply houses.? Refer to the MSC page below and scroll down past the shouldered ones.? And you will see unshouldered ones just like the original poster's photo.? Unless other jewelry making doo dads (and there are all sorts of cool stuff in that industry) associated with the lathe they may have been used for a usual machinist purpose.? On the other hand, the wide variety of sizes is a vote for jewelry making.? On the third hand, you could buy ones for jewelry making and use them for machinist inspection purposes, or on the fourth hand buy inspection tooling balls and use them for jewelry making. Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 02:51:01 PM PDT, Davis Johnson <davis@...> wrote:
A third option would be the "dent balls" used by brass instrument
repair folks. They are forced thru a tube to push out dents. They
generally don't have the stem that these have, and are frequently
barrel shaped. On 9/19/23 13:25, Charles Kinzer wrote:
I guess these could be either
"tooling balls" or the devices for jewelry making.? Some of
them look identical in photos.? I suppose one difference might
be how accurately they are ground.? Being with a machine tool
suggests to me they are more likely to be tooling balls which
machinists use.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:20:37 AM PDT,
Charles Kinzer <ckinzer@...> wrote:
I believe these are what are called
"Tooling Balls".? They are typically used in the
accurate positioning of work pieces.? The shank goes
into a hole and then the surface of the ball is used
as a reference.? Of course, actual position must be
offset based on the diameter of the ball used.? This
is similar to techniques using gauge pins, but the
ball shape allows more versatility, such as if
dealing with angles.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:11:23 AM
PDT, Adrian Nicolson via groups.io
<adrian_nicolson@...> wrote:
Commonly known as Dapping or
Doming Punches...used predominately by the
jewellery trades and crafts
Regards,
Adrian
On Tuesday, 19 September 2023,
18:06:20 BST, Andrei
<calciu1@...> wrote:
That's exactly?what they are.
There is a piece missing, which is
the doming block (or blocks, in
most cases).?
A full new set at Harbor Freight
is less than 40 bucks. I would not
pay much for this incomplete set.?
From:
[email protected]
<[email protected]> on
behalf of Peter Brooks
<peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM To: [email protected] <[email protected]> Subject: [Unimat] What on earth are these? ?
Looks like they could be for
beating metal to a dome shape¡ but
I have no idea. They were pictured
with a lathe so probably
metal-working related.
|
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Re: What on earth are these?
? though I searched as dapping block set William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 12:20:35 PM CDT, Charles Kinzer <ckinzer@...> wrote:
I believe these are what are called "Tooling Balls".? They are typically used in the accurate positioning of work pieces.? The shank goes into a hole and then the surface of the ball is used as a reference.? Of course, actual position must be offset based on the diameter of the ball used.? This is similar to techniques using gauge pins, but the ball shape allows more versatility, such as if dealing with angles. Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:11:23 AM PDT, Adrian Nicolson via groups.io <adrian_nicolson@...> wrote:
Commonly known as Dapping or Doming Punches...used predominately by the jewellery trades and crafts Regards, Adrian
On Tuesday, 19 September 2023, 18:06:20 BST, Andrei <calciu1@...> wrote:
That's exactly?what they are. There is a piece missing, which is the doming block (or blocks, in most cases).?
A full new set at Harbor Freight is less than 40 bucks. I would not pay much for this incomplete set.?
From: [email protected] <[email protected]> on behalf of Peter Brooks <peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM To: [email protected] <[email protected]> Subject: [Unimat] What on earth are these? ?
Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related.
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Re: What on earth are these?
They're for making domed shapes in precious sheet metal for jewelry making. One of the many things I intended to make for myself, one of these days. Finally got the lathe in 2008, took until last may to? learn to use the machine tools I've bought since then... ;) 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! 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. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 19, 2023 at 12:01:31 PM CDT, Peter Brooks <peter@...> wrote:
Looks like they could be for beating metal to a dome shape¡ but I have no idea. They were pictured with a lathe so probably metal-working related. |
|
Re: What on earth are these?
I think it may be unknowable whether these were purchased for jewelry making or machinist inspection purposes. Again, ones that look identical are sold by machinery supply houses.? Refer to the MSC page below and scroll down past the shouldered ones.? And you will see unshouldered ones just like the original poster's photo.? Unless other jewelry making doo dads (and there are all sorts of cool stuff in that industry) associated with the lathe they may have been used for a usual machinist purpose.? On the other hand, the wide variety of sizes is a vote for jewelry making.? On the third hand, you could buy ones for jewelry making and use them for machinist inspection purposes, or on the fourth hand buy inspection tooling balls and use them for jewelry making. Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 02:51:01 PM PDT, Davis Johnson <davis@...> wrote:
A third option would be the "dent balls" used by brass instrument
repair folks. They are forced thru a tube to push out dents. They
generally don't have the stem that these have, and are frequently
barrel shaped. On 9/19/23 13:25, Charles Kinzer wrote:
I guess these could be either
"tooling balls" or the devices for jewelry making.? Some of
them look identical in photos.? I suppose one difference might
be how accurately they are ground.? Being with a machine tool
suggests to me they are more likely to be tooling balls which
machinists use.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:20:37 AM PDT,
Charles Kinzer <ckinzer@...> wrote:
I believe these are what are called
"Tooling Balls".? They are typically used in the
accurate positioning of work pieces.? The shank goes
into a hole and then the surface of the ball is used
as a reference.? Of course, actual position must be
offset based on the diameter of the ball used.? This
is similar to techniques using gauge pins, but the
ball shape allows more versatility, such as if
dealing with angles.
Charles E. "Chuck" Kinzer
On Tuesday, September 19, 2023 at 10:11:23 AM
PDT, Adrian Nicolson via groups.io
<adrian_nicolson@...> wrote:
Commonly known as Dapping or
Doming Punches...used predominately by the
jewellery trades and crafts
Regards,
Adrian
On Tuesday, 19 September 2023,
18:06:20 BST, Andrei
<calciu1@...> wrote:
That's exactly?what they are.
There is a piece missing, which is
the doming block (or blocks, in
most cases).?
A full new set at Harbor Freight
is less than 40 bucks. I would not
pay much for this incomplete set.?
From:
[email protected]
<[email protected]> on
behalf of Peter Brooks
<peter@...>
Sent: Tuesday, September 19, 2023 1:01 PM To: [email protected] <[email protected]> Subject: [Unimat] What on earth are these? ?
Looks like they could be for
beating metal to a dome shape¡ but
I have no idea. They were pictured
with a lathe so probably
metal-working related.
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Bill in OKC too
Carl
Tool247