DMG CMX 70 U - before starting to mill, my table rotates for 180 degrees about z axis

[edin_ibreljic]

Hi there, as I mentioned in the title, on 3+2 axis DMG CMX 70 U, when I postprocess the program where I have operations with tilted planes (using swivel) before any job my machine rotates with swivel for 180 degrees and then start milling. Pieces are done correctly but workers are confused (also me) with this unnecessary swivel at the beginning of the program. How to remove it?

[serge.quiblier]

Hello  

without any code to analyze, it's hard to tell.

Are you using a machine definition file, or the kinematic is hardcoded in the post?

The system is calculating based on some preferences and tool vector orientation.

It may try to comply with a prefer positive (or negative) direction for a rotary axis.

Or a parameter set to a value forcing a tilted workplane to act this way.

Is this an Heidenhain controller or a Siemens?

Regards.

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[edin_ibreljic]

Hi there,

Nice to hear from You.

I am using machine definition file, downloaded from official Autodesk Library.

It is Siemens controller. If You can analyse the code, I attached one here now.

It is really confusing for CNC operaters when they machine parts.

Expecting to hear from You, and thank You very much,

Edin

[serge.quiblier · Accepted solution]

Hi @edin_ibreljic ,

I am not completely sure, but you can try to alter one value in the CYCLE800 definition?

As the behavior of the cycle is driven by machine parameters and sub program created by the machine tool builder, we sometime get different behaviors with the same cycle definition.

In your case, look at the fourteenth parameter:

N30061 G54
N30062 CYCLE800(1,"",0,57,0,0,0,0,-45,0,0,0,0,-1,,0)
N30063 G0 X64.43568 Y-26.46981

You can try to change the value -1 to 1, and test on the machine.

According to the manual:

What is unclear is which axis is considered as the one usng that preference.

If changing the value does not affect the program, we will need to figure out something else.

If it does not adversely affect the other tilted workplanes defined inside the program but solve the issue at start, we can then try to change the post.

But be careful when testing.

Regards.

______________________________________________________________

If my post answers your question, please click the "Accept Solution" button. This helps everyone find answers more quickly!

[edin_ibreljic]

Changing fourtheenth parameter to 1 instead -1 solved my problem.

Thank you very much and I appreciate quick and valuable help.

Thanks once again @serge.quiblier ,

Edin