I’ve spent the last few months learning enough Siemens NX (build 3701) to be dangerous and reading through other’s experiences on using NX CAM with the Pocket NC. I feel like I’ve consumed all the bits of info available for making NX work with a Pocket NC, but I keep running into strange coordinate system issues.
I’m just trying to do a floor operation on the top of the part. I’m using the machine kit available from post hub (version 5.5.0). The Geometry has a MACHINE MCS located at the machine’s origin, and a G54 MCS located on the stock touch off point. Both are oriented with Z pointing towards the tool, Y up. But when I bring the Gcode over to Kinetic control and simulate it, modifying the G54 Z moves the simulation up/down. I’m honestly at a loss and I’m not sure how to debug it further.
MACHINE MCS
G54 MCS
Machine Code Based Simulation
Penta Simulator with correct G54
Penta Simulator with G54 Z set to 100mm
Gcode
jaw.ngc (5.0 KB)
I’d really appreciate any help
HI @littlepumpkin
When I test and set my TLO to -82.682 in setup (the current setting for the tool loaded in my machine) it looks ok.
What is your setting for TLO on T15?
regards
TP
Also, the height difference you are seeing between the last two images is correct. Remember its a 5 axis machine so the motions before Z will be to orient the A axis so the tool axis is 90 degrees to what the images show so the actual tool path is moving along the Z axis once its done the orientation move.
If you can share the NX part file I can check the setup and test on my machine.
Hi Tokyo, I’m glad you’re still hanging out in the forum 
This is probably just me fundamentally misunderstanding something. When I create the both MCS they’re with Z pointing towards the spindle with A=0 and B=0. When I’m touching off the part it’s also with A=0,B=0. When I perform the facing operation, I was expecting it to know as part of the operation (to make the toolpath normal to the face) it’d rotate A to 90, but it’d handle Y/Z swapping correctly. Currently if I put a longer tool in the device, and touch off, it makes the toolpath go lower on the Y axis, instead of away from the spindle as I expected.
I could change the G54 to point Z upwards, and the toolpath locates correctly then, but I can’t get A to rotate 90.
I’m not sure that made sense? I could record a video going through it or something like that if it might help understand the issue?
If you send your part file I’ll set it up as reference for you and make a video. We can also have a video call if needed and I can explain live with your part. I also think you moved the G54 csys in x and y away from the center of the B axis. That will move the program unless you put the XY shift in the G54 setting in the Kinetic UI under setup.
