G0 movement gouges part

Hi guys,

I wonder what's going on with my G0 movement.
My mill is at Z-11, then 2 G0 statements come after each other.
G0 Z3
X... Y..

What I can see is that x/y coordinates are changing way before Z reaches 3 - it starts so early, before Z0! so it gouges the part.
Happens even when rapid feed rate is reduced to 1%. I can of course change the post to use G1 to go to safe zone.

But I'd rather understsand why G0 behaves like this. I heard of machines who will do unsynchronized motion, but this should be sth different.

Who can explain?

Regards,
Daniel

No sir, Checked the code and no g64 there. And the standard when powered up is g64 p0.002.

Regards Daniel

Have you tried to repeat these lines very slow and see when this (i think diagonal) movement happens...
Mike

Sorry it took so long, today I found another perfect example (forgot to use feed instead of g0)...
There you go:



even though the code says to move to Z4, then X/Y, the machin stops before reaching Z4 and only continues to move in Z when I execture the next step which is a X/Y movement.
You can see it clearly in the video.

Looking forward to opinions!!

Regards,
Daniel

honestly, i just wanted to play with the colour changing toolpath thing that recently was added by cmorley (thanks for the help) , I am getting similar values to what tommy is getting in regards z height, ( mine are .5mm and 1.879mm), but the entry on the letter c is what caught my attention,



this is G64 P0.05



this is just G64



this is both
the entry into the arc on the letter c is better(?) with G64, than on g64 P 0.05, all the others are seemingly predictable, im going to assume, based on the line legment length, for G64, but there is no blend on when entering on an arc, while p0.05 stays uniform the entire time. I dont know what it means, or if its a problem, I just found it interesting. I usually program an overlap on a contour toolpath anyways




this one just for kicks, colours reversed on this one

on an unrelated note, do you ever try to rotate/pan screenshots of axis, and wonder why its not working...

Did you try G64 P .002 Q.002
?