My 15+yr old Speedway 10x14 lathe has recently developed erratic spindle speed. ?The lathe has had pretty heavy use and is now kicking into max RPM on its own at times¡.very unnerving and dangerous. ?There are also times when the chuck has jerky movement with the speed knob set at zero and the only way to stop it is with the kill switch.
Is the a simple fix like replacing the?potentiometer (+- $20) or will the entire power box (+- $200).
Thanks in advance for your help.
Tom
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Re: belt slip on Mini Lathe Machine with 600W
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I measured the motor speed as about 5000 RPM. I have it geared
down to give a spindle speed of 2200 RPM.
Tom
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Re: belt slip on Mini Lathe Machine with 600W
I have noticed that speed (5,000 RPM) on higher wattage/HP? motors.?
There one found that had 6,000 PRM.
Dave?
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Re: belt slip on Mini Lathe Machine with 600W
I measured the motor speed as about 5000 RPM. I have it geared down to give a spindle speed of 2200 RPM.
Tom
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Re: $1000 Budget: Which 7 x 14 to buy?
I got desperate for a wheel setup. So just cranked out a shaft. Kinda sloppy but it actually worked. Then for a wheel i found a baby stroller dumped in my back alley. And surprise , it had two nice front wheels that are about the same 9in or so. Just put some grub screws through the hub and this secured the wheel to the shaft. So far so good.
george ,?
On Sunday, December 3, 2023 at 11:43:34 AM PST, John Mattis <john.mattis@...> wrote:
I got a new Speedway mini lathe about 21 years ago. It's not perfect, but I have made several modifications to make it better. Perhaps the?best one is the modification I made to he change gear adjuster which is described in the attachment. I have also?attached a pdf of my?handwheel design. I have drawings and photos of everything?I have done and they are available on request. Regards,? John Mattis (retired mechanical engineer)
Forget about getting a perfect Chinese lathe. If it were tinkered into perfection at the factory, it would be like the British Myford lathe ($5000+).?
Instead, you can buy a Chinese mini-lathe and tinker it into perfection yourself.? Improving your new lathe is a good way to learn basic metalworking skills and (unlike with vintage American lathes), if you screw something up the parts are easily replaced.
Mike Taglieri?
On Sun, Dec 3, 2023, 1:55 PM mike allen < animal@...> wrote:
Unfortunately that seems to be the new norm with a lot of
purchased items these days . Reading some of the reviews for
things on Amazon& other sites? just enforces that statement .
animal
On 12/3/23 6:57 AM, Craig Hopewell via
wrote:
And some get total crap from Grizzly and LMS.
My old SIEG Homier 7x12 was far better finished (ways and
cosmetics) than two Grizzly 7x14's and one LMS 7x16 lathes.? ?One
Grizzly seized and the other would not reliably shut off - both
went back, and finally got a refund.? ?The LMS (that I received)
may be the worst finished of all four.
I stand by my statement.? ?Buy the cheapest (that has a free
return), with consideration of the variants, and hope for one that
is serviceable with minimal tuning.
--
Lone Tree, Colorado? ?USA
Attachments:
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Re: $1000 Budget: Which 7 x 14 to buy?
Hi Mike.?
I went with the Clough 42 controller system.? ? It interfaces with a Texas Instruments board and the software that is needed is available on GitHub.? ? There's also a forum on GitHub for support, etc.? James (Clough42) has a full video series on YouTube about how he designed and built the controller and software.? The system, the Clough42 kit has a board that plugs into the Texas Instruments board, a rotary encoder is used to feed RPM data back to the TI board and then the TI board drives a stepper motor to drive the lead screw through a belt and pulleys.? It sounds a bit complex but it's really not.? I'm not great with electronics stuff and this was fairly easy.? My stepper motor and encoder came from Amazon,? the TI board I ordered direct from them and the belts and pulleys and Clough42 kit I got through eBay.? I built my own mount for the stepper motor and it mounts to the lathe where one of the change gear parts was originally.? The whole mount pivots to adjust belt tension.? With all the parts, pieces and aluminum to build my motor mount I spent just over $400.00 US and to me it's been worth every penny as I often do tiny little projects that I single point thread and this allows me to turn to a finish diameter, do any SAE or metric thread with the push of some buttons and go right back to using the lead screw feed to turn.? It's literally seconds from turning to threading back to turning.?
encoder I used
stepper
power supply
and a picture
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Re: $1000 Budget: Which 7 x 14 to buy?
I got a new Speedway mini lathe about 21 years ago. It's not perfect, but I have made several modifications to make it better. Perhaps the?best one is the modification I made to he change gear adjuster which is described in the attachment. I have also?attached a pdf of my?handwheel design. I have drawings and photos of everything?I have done and they are available on request. Regards,? John Mattis (retired mechanical engineer)
Forget about getting a perfect Chinese lathe. If it were tinkered into perfection at the factory, it would be like the British Myford lathe ($5000+).?
Instead, you can buy a Chinese mini-lathe and tinker it into perfection yourself.? Improving your new lathe is a good way to learn basic metalworking skills and (unlike with vintage American lathes), if you screw something up the parts are easily replaced.
Mike Taglieri?
On Sun, Dec 3, 2023, 1:55 PM mike allen < animal@...> wrote:
Unfortunately that seems to be the new norm with a lot of
purchased items these days . Reading some of the reviews for
things on Amazon& other sites? just enforces that statement .
animal
On 12/3/23 6:57 AM, Craig Hopewell via
wrote:
And some get total crap from Grizzly and LMS.
My old SIEG Homier 7x12 was far better finished (ways and
cosmetics) than two Grizzly 7x14's and one LMS 7x16 lathes.? ?One
Grizzly seized and the other would not reliably shut off - both
went back, and finally got a refund.? ?The LMS (that I received)
may be the worst finished of all four.
I stand by my statement.? ?Buy the cheapest (that has a free
return), with consideration of the variants, and hope for one that
is serviceable with minimal tuning.
--
Lone Tree, Colorado? ?USA
|
Re: $1000 Budget: Which 7 x 14 to buy?
Forget about getting a perfect Chinese lathe. If it were tinkered into perfection at the factory, it would be like the British Myford lathe ($5000+).?
Instead, you can buy a Chinese mini-lathe and tinker it into perfection yourself.? Improving your new lathe is a good way to learn basic metalworking skills and (unlike with vintage American lathes), if you screw something up the parts are easily replaced.
Mike Taglieri?
On Sun, Dec 3, 2023, 1:55 PM mike allen < animal@...> wrote:
Unfortunately that seems to be the new norm with a lot of
purchased items these days . Reading some of the reviews for
things on Amazon& other sites? just enforces that statement .
animal
On 12/3/23 6:57 AM, Craig Hopewell via
wrote:
And some get total crap from Grizzly and LMS.
My old SIEG Homier 7x12 was far better finished (ways and
cosmetics) than two Grizzly 7x14's and one LMS 7x16 lathes.? ?One
Grizzly seized and the other would not reliably shut off - both
went back, and finally got a refund.? ?The LMS (that I received)
may be the worst finished of all four.
I stand by my statement.? ?Buy the cheapest (that has a free
return), with consideration of the variants, and hope for one that
is serviceable with minimal tuning.
--
Lone Tree, Colorado? ?USA
|
Re: $1000 Budget: Which 7 x 14 to buy?
Unfortunately that seems to be the new norm with a lot of
purchased items these days . Reading some of the reviews for
things on Amazon& other sites? just enforces that statement .
animal
On 12/3/23 6:57 AM, Craig Hopewell via
groups.io wrote:
toggle quoted message
Show quoted text
And some get total crap from Grizzly and LMS.
My old SIEG Homier 7x12 was far better finished (ways and
cosmetics) than two Grizzly 7x14's and one LMS 7x16 lathes.? ?One
Grizzly seized and the other would not reliably shut off - both
went back, and finally got a refund.? ?The LMS (that I received)
may be the worst finished of all four.
I stand by my statement.? ?Buy the cheapest (that has a free
return), with consideration of the variants, and hope for one that
is serviceable with minimal tuning.
--
Lone Tree, Colorado? ?USA
|
Re: $1000 Budget: Which 7 x 14 to buy?
I think most are made by same company
so more of color and sticker??
Better quality control will cost a lot more , weight is greater , large size and a different company.
Dave
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I put dimension on the drawing?
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
Must say something for quality control in the factory.?
toggle quoted message
Show quoted text
On 3 Dec 2023, at 15:05, Craig Hopewell via groups.io <cch80124@...> wrote:
? [Edited Message Follows]
And some get total crap from Grizzly and LMS. [david@...]_._,_._,_
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Re: $1000 Budget: Which 7 x 14 to buy?
I downloaded the Warco? WM180 (3200B) manual.? It is very close but it is in the UK.
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
And some get total crap from Grizzly and LMS.
My old SIEG Homier 7x12 was far better finished (ways and cosmetics) than two Grizzly 7x14's and one LMS 7x16 lathes.? ?One Grizzly seized and the other would not reliably shut off (both during run in) - both went back, and finally got a refund.? ?The LMS (that I received) may be the worst finished of all four.
I stand by my statement.? ?Buy the cheapest (that has a free return), with consideration of the variants, and hope for one that is serviceable with minimal tuning.
--
Lone Tree, Colorado? ?USA
|
Re: belt slip on Mini Lathe Machine with 600W
I work out the RPM on motor by calculating the belt ratio.
The motor at high speed was run at 4,300 RPM.?
I am thinking of a single belt too.
Dave
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Find a good program is important.
The biggest reason I chose Autocad was the metal industry use it a lot.?
Before I started with Autocad 95 in 1996 I purchased TurboCad in 1995. It work great and simple to use.
I stay with Autocad today is know program and all my menus work on Autocad.??
Before cad I did hand drawing since the 1960's.? Hand drawing is very handy in shop for laying out.?
I think more to do is what started with .
I found TurboCad is a very good CAD program AKA DoubleCad.??
I had try others CAD programs in the 1980's and 1990's and they just did not fit.?
Dave
PS: I think best CAD is Autocad 95?
I Autocad 2000 because it has spell check.?
You find Autocad on Abandon programs on internet.? In 1996 I paid for Autocad 95 almost $600.00
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FreeCad. Especially if you make PCBs with Kicad, there's a direct
gateway in between.
On 03.12.23 01:58, Miket_NYC via
groups.io wrote:
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Show quoted text
If I remember right, Autocad is one of the pricey
ones. Can anyone recommend a good, free or inexpensive CAD
drawing program?? What drawings I do are still by hand.?
Mike Taglieri?
On Sat, Dec 2, 2023, 2:21 PM
mike allen < animal@...> wrote:
Thanks
animal
On 12/2/23 11:08 AM, davesmith1800 wrote:
Autocad 2000 on Windows 11 64 bit.
Dave?
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Re: belt slip on Mini Lathe Machine with 600W
I don't see the motor RPM in the description either. I will check the spindle RPM and try to work backwards from there.
Tom
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>>If I remember right, Autocad is one of the pricey ones. Can anyone recommend a good, free or inexpensive CAD >>drawing program?? What drawings I do are still by hand.?
For Free (or low cost) 2D drawings, qcad? and librecad might be worth looking at.?
Note:? Its been a while since I've used either program: I had a paid version of Qcad Professional that I used for a few simple projects then didn't do any drawings for almost a decade.? By the time I needed to do a few more drawings LibreCAD was available, offered a similar interface, and was included in the linux distro I was using at the time (both work on windows as well).? Since then I've been getting into some 3D CAD design with FreeCAD, which may be worth considering as well, though its learning curve is steep.? The FreeCAD "TechDraw Workbench" is great for taking a 3D part and creating 2D drawings).
Qcad ()??? The free version is (well was back when I used it) had a good set of features.? Qcad Professional ($42 download) offers support for more formats and enhanced drawing capabilities.
LibreCAD ( ) Started as a fork of an earlier version of Qcad, so its interface is similar.? Also available for linux and windows (and OSX, I think).?
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Try?
Works great on both Windows 10 and Windows 11
Dave?
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davesmith1800
John Mattis