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Author Topic: Not cutting circles neatly  (Read 208 times)

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Offline PeteG

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Not cutting circles neatly
« on: April 08, 2020, 08:33:10 AM »
Advice needed again.

I noticed that circles on my machine don't cut nicely and seem to have an odd shape where the Y axis reverses direction - see attached pic.

The CRV file is just a test to return to X Y zero for a tool change and reset Z zero.

Cheers

Peter

Offline Tweakie.CNC

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Re: Not cutting circles neatly
« Reply #1 on: April 08, 2020, 09:57:15 AM »
Oval circles like that can be caused by backlash. Most common cause is probably a loose grub screw in a flex coupling or drive pulley etc. in any event the cause is usually mechanical.

Tweakie.
KEEP SAFE !

Offline PeteG

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Re: Not cutting circles neatly
« Reply #2 on: April 08, 2020, 10:27:32 AM »
Thanks for the reply, I was thinking that I might be that, good to get another opinion though.

Cheers

Peter