Electronic Leadscrews?

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pete
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Electronic Leadscrews?

Post by pete » Sun Mar 25, 2018 8:38 pm

Just so I don't throw Mauro's Threading Without the End Groove off topic I thought I'd mention a company and product I just ran across last month. https://www,rocketronics.de Seems to be possibly a home based? start up company and located in Germany. He's offering what looks to be a fairly comprehensive building block style of almost cnc but not quite kits at a fair price for what they are. Stefan Gotteswinter and a guy with a user name of Jan Sverre Haugjord on Youtube are supposed to be doing a review of the kits and the capabilitys in the near future. Both of those YT posters I'd judge to be extremely talented and more than knowledgeable. The 2 axis kit allows some limited part shaping beyond the ability to cut any thread metric or imperial without change gears. Rocketronics and at least a few others have some YT videos up showing some pretty impressive results in my opinion. I know of one other Electronic leadscrew manufacturer at Babin Machine Tool with a design mostly meant for the Hardinge HLV lathes and at industrial quality it's in the $3,000 - $4,000 range. Rocketronic's is at least 1/4 of that price or less.

stephenc
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Re: Electronic Leadscrews?

Post by stephenc » Mon Mar 26, 2018 10:30 am

Way back when I first got my grizzly g0602 I remember reading somewhere about a fellow who had converted his to an electronic lead screw with some sort of tone ring
On the spindle and a stepper motor on the lead screw .
I tried to find it again but came up with nothing , my memory doesn't go so far as to remember how he was controlling it unfortunately.

pete
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Re: Electronic Leadscrews?

Post by pete » Mon Mar 26, 2018 4:44 pm

There's some more than clever people who are far better with computers and electronics than I can ever hope to be. It's my understanding that a full cnc conversion on any lathe and running Mach 3 for the CAM program doesn't work well while threading since Mach 3 apparently does a poor job of tracking the spindles exact position. A few of those videos of that Rocketronics system show some extremely good tracking results. An Arduino and spindle encoder with some good understanding of what else is needed is supposed to be capable of doing the same job. Way outside something I'd try to attempt though. :-( Other than figuring out the mechanicals of mounting the encoder and steppers on whatever lathe a person has that Rocketronics system looks pretty simple.

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SteveHGraham
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Re: Electronic Leadscrews?

Post by SteveHGraham » Mon Mar 26, 2018 4:53 pm

There used to be an ELS group on Yahoo. Might still be there.
Every hard-fried egg began life sunny-side up.

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Will's 2882
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Re: Electronic Leadscrews?

Post by Will's 2882 » Tue Mar 27, 2018 10:45 am

There is a typo in the web address. It is https://www.rocketronics.de
And it is in German

pete
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Re: Electronic Leadscrews?

Post by pete » Tue Mar 27, 2018 4:59 pm

Thanks Will

WJH
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Re: Electronic Leadscrews?

Post by WJH » Sat Mar 31, 2018 5:38 pm

Why do an ELS? It’s most of the way to CNC, might as well do CNC.

Magicniner
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Re: Electronic Leadscrews?

Post by Magicniner » Sat Mar 31, 2018 6:16 pm

WJH wrote:
Sat Mar 31, 2018 5:38 pm
Why do an ELS? It’s most of the way to CNC, might as well do CNC.
Exactly my thoughts too, I suppose if you had no gearbox and a lathe that didn't take change wheels......

John Hasler
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Re: Electronic Leadscrews?

Post by John Hasler » Sat Mar 31, 2018 8:07 pm

Change gears are a major reason I'm considering an ELS. I can't see it as most of the way to CNC, though.

WJH
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Re: Electronic Leadscrews?

Post by WJH » Sun Apr 01, 2018 10:06 pm

John Hasler wrote:Change gears are a major reason I'm considering an ELS. I can't see it as most of the way to CNC, though.
You can 3D print change gears, or just machine your own


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John Hasler
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Re: Electronic Leadscrews?

Post by John Hasler » Sun Apr 01, 2018 10:36 pm

I have a full set of gears. It's changing them that makes me want ELS.

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Will's 2882
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Re: Electronic Leadscrews?

Post by Will's 2882 » Mon Apr 02, 2018 9:44 am

I sent a request about getting a unit that would cut in inches. This is their reply.


Hello,
unfortunately, the ELS can only work in metric units, as Inches would take up too much room and would also be not precise enough.
The common used 0,001 inch is only 0.0254 mm. The ELS now works with 0.001mm precision. So we would need at least be able to enter 0,00001 inch to use the current internal precision, which are 3 digits more needed. The display does not have that much space.
Also, the calculation is much easier in metrics, as I would need to recalculate every number before display. Not to mention rounding errors etc.
I am sorry, but it is not possible at the moment. If I ever rebuild one with a larger display, I would maybe able to do it.

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