CNC'ing a small lathe - pimping the unpimpable...

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Sun May 08, 2011 12:45 pm


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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby OverTheTop » Sun May 08, 2011 5:43 pm

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby cryoscum » Fri May 13, 2011 10:00 pm

G'day gents

As PK probably thought, but thought to spare my sensitive ego, I got the T5 belt I ordered and the belt is one tooth too small, and I can't adjust it in that direction to make it work!!

Ok, after some crass language, the answer is simple: remake the stepper motor brackets and make sure the new ones have slotted holes to allow for suitable adjustment. Then order a new belt, at the princely sum of $6. Problem is the supplier only has belts with 10 tooth increments, so slotted brackets will be crucial.

Simple right? Nearly got my finger taken off by a chuck spun bracket and decided its time to end the child's play... Need a mill, now.

1.JPG
1.JPG (66.96 KiB) Viewed 3029 times


Will probably have to CNC this next, but let's first get the lathe right!
More to follow...
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
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Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Fri May 13, 2011 10:04 pm

Hey, you could CNC that mill!

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby Space Mark » Fri May 13, 2011 10:14 pm

Could probably CNC the drill press too. For those too lazy to pull the handle... just press a button!
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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Fri May 13, 2011 10:56 pm


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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby ROCKet STAR » Sat May 14, 2011 12:42 am

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Sat May 14, 2011 7:44 am


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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby Space Mark » Sat May 14, 2011 11:38 am

Well at least you'd get exact drill depths heh.
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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Sat May 14, 2011 7:51 pm


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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Sun May 15, 2011 6:16 pm

Here ya go

Image
This machine will drill the same hole, in the same stuff, for it's entire life. If you get the feed right you can do it with a single retract to clear the swarf. It'd be great candidate for a single axis CNC machine.

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby cryoscum » Mon May 16, 2011 7:46 pm

Much better! Easy and still have all my fingers!
1.JPG
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AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby cryoscum » Tue Jun 07, 2011 8:44 pm

Brackets and belts in place, adjustable and ready to go...
Attachments
2.jpg
2.jpg (63.59 KiB) Viewed 2846 times
1.JPG
1.JPG (43.55 KiB) Viewed 2846 times
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

PK
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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby PK » Tue Jun 07, 2011 8:57 pm

You might want to consider drilling out the mounting hole on the stepper and making a tapped spacer to brace as shown in the attached pic. The reason being that the required tension on the belt will result in flex of that bracket and asymetricrical (and hence premature) wear on the belt and pulleys. If you can get another brace below then that'd be tops too, but it looks like you have a small tab welded into the corner which should help.

PK
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1-2.jpg
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Re: CNC'ing a small lathe - pimping the unpimpable...

Postby cryoscum » Tue Jun 07, 2011 9:16 pm

Already have a 50x50x6mm brace welded in there. I think you can lift the whole lathe by that bracket...
Attachments
3.JPG
3.JPG (37.46 KiB) Viewed 2837 times
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns


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