Z axis repeatability

[sawnsand]

I have been having an issue with some simple text. All seems well in the Vcarve file, but when I go to cut the text it gets progressively deeper. Cut starts at the prescribed depth (.06) and when its done depth has gone to (.11). I am using a 30 degree vbit for this cut... seems as if the Z axis is having trouble holding its own during this cut. 7 lines, about 140 letters, so there is a lot of up and down on the z axis.... In the same file I have two pocket cuts with a 1/4" end mill that run in opposing directions to get a smooth surface, Z axis holds very well during this cut. Any suggestions?

Meteor
V Carve Pro

[beltramidave]

Since you are surfacing the material with your pocket routine, I would think that would rule out an uneven surface, which was my first thought. I would double check that the set screws for your Z axis coupling are tight and nothing is slipping. Also make sure your bit is tight in the collet. Maybe slow down your plunge speed..

Dave

[sawnsand]

Good suggestions, I did find the coupler would take about 1/8 turn tightening.. I released both set screws and retightened. I am going to reduce plunge speed also. First have to stop by and get some cheap material to test those adjustments

[sawnsand]

Tightening the coupler, and reducing the plunge rate from 30 in/min to 15 in/min have made things right again ...

[beltramidave]

Glad it helped. I would think that you should be able to plunge faster than 15IPM though without losing steps.

Dave