My sizes are out

**phill05** · 03-04-2020

Have you tried with a different vernier caliper or always the same one?

**Desertboy** · 03-04-2020

Originally Posted by phill05

Have you tried with a different vernier caliper or always the same one?

Always the same one but you can see a mm on a ruler which I also tried, the bit is a 1/2" trend router bit, and it's in a 1/2" collet so I think my calipers aren't the issue here.

The pocket even using measuring tape I can see are 1mm undersized.

BUT this gap is meant to be 100cm so the only thing I can think off is the controller is offsetting the tool.

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Thinking I might need to connect the X, Y & Z to a breakout board and do a test cut from linuxcnc super slow to see if that shows the same size issue.

**JAZZCNC** · 03-04-2020

This is a wild shot but suppose must be asked.! . . .You have trammed the spindle haven't you.? Does the bottom of the pocket measure same as the top.?

**Desertboy** · 03-04-2020

Originally Posted by JAZZCNC

This is a wild shot but suppose must be asked.! . . .You have trammed the spindle haven't you.? Does the bottom of the pocket measure same as the top.?

I can't remember if I did now, I've had the Z off a few times including changing the gantry rails, did I tram it last time?

Will go check shortly.

**JAZZCNC** · 03-04-2020

Originally Posted by Desertboy

I can't remember if I did now, I've had the Z off a few times including changing the gantry rails, did I tram it last time?

Will go check shortly.

Actually, on reflection, it wouldn't make any difference the size would still be correct it's just your pocket walls would be a parallelllllll gram or what ever they are called..