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Author Topic: Arcs not cutting smoothly  (Read 14749 times)

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Re: Arcs not cutting smoothly
« Reply #30 on: July 25, 2012, 12:20:36 PM »
If you are cutting an arc say from 12 o'clock to 3 o'clock is it smooth in any position? i have noticed on my machine its better in some places than other. Between the 1 & 2 position is the worst.
It seems to always be present during arcs. For a reality check I ran the same part with LinuxCNC and the results were exactly the same. Facets in the same places. So unless they are using the same exact stepping routines, I am going to have to look into my mechanics. Always a PITA. Guessing it has something to do with the system surging due to either timing belt, slightly off-center timing pulley, or possibly a wobbly lead-screw. The parts are accurate within .002, but the facets are bad.

Offline Graham Waterworth

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Re: Arcs not cutting smoothly
« Reply #31 on: July 28, 2012, 05:08:47 AM »
Are your slideways sticking or too tight on the gib , this can cause a buildup of pressure that releases in a jolt, you can see this on a DTI clock set against a block with the backlash removed first if you jog in very small moves in the same direction, the clock will not move and then suddenly jump.

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