Oval holes and random path deviation

AdamFilipowicz · April 15, 2016, 4:47am

I’ve noticed that small holes are oval instead of circular. I have done x y step calibration. It’s accurate to the mm over a distance of 500mm

I have also had issues with a random deviation of a cut path. It will randomly jet out of position. And gouge the material but then continue back on its course. Usually back in the right position.

AdamFilipowicz · April 15, 2016, 4:50am

example of the issue.

Ebr · April 15, 2016, 5:10am

Make sure to tighten the small screws on the belt pulleys and that they lock down on the flat part of the motor shaft.

A slipping pulley can cause circles and arcs to get messed up.

AdamFilipowicz · April 15, 2016, 5:22am

I recently upgraded to 6mm gt3 belts and pulleys. Both are snug

BenJames · July 8, 2016, 7:22pm

Did you have any luck finding the solution?

I’m having the same re: oval rather than circular holes…

BenJames · July 9, 2016, 8:25am

I did, and it seems correct.

Also the ovals are not all uniform ovals which makes me think there may be something loose or misaligned?

BenJames · July 9, 2016, 7:38pm

Phil, thank you so much for helping me with this. I didn’t put together the machine, and now I’m worried now that there are no set screws - i found 5 instances like this on my machine - are set screws meant to be here?