Yasnac i80 Issue

[Scott.Damman]

Thanks to lots of help from the members here I was successful getting my Kitamura Mycenter 2 (1997 vintage) running. Producing great parts. Thanks again to those that helped me!

Having an odd issue wanted to see if anyone has seen.

While running longer adaptive programs part way through the program the machine develops an x,y,z shift. Seems to be around +0.030in. If the program contains additional operations after the "long" adaptive the shift stays through the additional operations. But if I post process say op2 and don't run the adaptive, op2 runs correctly with no shift.

Seems to only happen on programs longer than ~1hr.

I am drip feeding the machine using a calmotion USB DNC
Parts were confirmed to be tight in the vise after the op. Vise is tight to table.
WCS (G54) was confirmed after the program ran using a Haimer probe

Any thoughts greatly appreciated!

 

[Scott.Damman]

Wanted to send an update on this issue. Incase anyone else finds something similar.

Here are a couple photos representing what it was doing. While cutting adaptive cuts the machine seemed to be developing a XYZ shift of some kind. After lots of testing I have found the cause seems to be high feed rate non contact tool paths. I am not sure why the controller cant handle these moves. If anyone has any insight on that I am all ears. But if I use a more traditional Z retraction strategy all is well. Anyone seen anything similar with Yasnac i80 controls? Thanks

 

[Dan from Oakland]

A coupling slipping between ball screw and servo? Is it one axis or multiple? Adaptive tool paths have some kinda severe direction reversals that conventional tool paths never see. Just a thought- when you rehome the machine is there any position shift?

 

[claya]

How large are your adaptive cut programs?