Post Help

[Jammer™]

Running contours with rotary axis on and set to 3 axis rotating about the x axis I cut a feature and when it retracts to go to the next location it seems as the Z and A axis are moving simultaneously creating a ramp looking gouge in my parts. How can I get it to retract in Z before rotating A to go to next location?

 

TIA

[Mr. Wizzard]

MPMaster post?

[Teh Bear without Brains kinda idiot]

Sometimes it can be the bug

Because Mc do not shows actual movements of tool and machine

It always moves tool around part

Even backplot will show it

verify can show it too

Sometimes both

Sometimes verify OK and backplot scrappy.

In such situation I read nc code

 

Simple way to produce it is to drill 2 holes 180 degrees on the cylinder

The actual movements will be raise tool and turn A

In the backplot you may see tool raises and moves through the part.

Now verify results are unpredictable it can show or not show it

HTH

[Mr. Wizzard]

ret_on_indx : 1 #Machine home retract on rotary index moves, (0 = no, 1 = yes)

 

I have this set to 1 in mpmaster for 4-axis rotation retracts.

[Jammer™]

That's prolly it Mr. Wizard. Mine was set to 0.

 

Thanks fellas! I owe ya both a PBR

[NOTW Programmer]

That works for the MPMaster post but what about the In-House, how about you post a snippet of the block that outputs the bad code so we can take a look at it.

[Jammer™]

ret_on_indx : 1 #Machine home retract on rotary index moves, (0 = no, 1 = yes)

This causes the tool to retract to Z home position before returning to next cut. Not what I wanted. I just want Z to retract to the clearance or feed plane position then rotate the the A axis.

[Mr. Wizzard]

Ok, next thing. Can you post the line that moves/retracts it? Is it posting Z and other moves or are they on separate lines? What control?

Some "dogleg", some controls will do the Z first, then the rest. Maybe check your retract and clearance number to make sure they're incremental or absolute, sometimes I'll switch the way i do things for 4th axis stuff and forget to check those.

 

 

Also, what toolpath?

[Colin Gilchrist]

Jammer,

 

Have you tried using a Reference Point? Also, in your Control Definition, are you set to 'Break Rapid moves'?

[gcode]

I'm working a part using 5X curve toolpaths on a 4 axis VMC.

abd I'm having a tough time getting clean retracts.

Reference Points do not work at all

 

I've used mpmaster posts for years, but I'm getting better results with a stock mpfan post

and a saftey zone