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

cryoscum · 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.

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Will probably have to CNC this next, but let's first get the lathe right!
More to follow...

PK · Postby PK » Fri May 13, 2011 10:04 pm

Hey, you could CNC that mill!

:-)

Space Mark · 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!

PK · Postby PK » Fri May 13, 2011 10:56 pm

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

PK · Postby PK » Sat May 14, 2011 7:44 am

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

Well at least you'd get exact drill depths heh.

PK · Postby PK » Sat May 14, 2011 7:51 pm

PK · Postby PK » Sun May 15, 2011 6:16 pm

Here ya go

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.

PK

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

Much better! Easy and still have all my fingers!

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

Brackets and belts in place, adjustable and ready to go...

PK · 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