[kaleb08]

The simulator is running down the centerline of the endmill toolpath instead of moving over half the took diameter. Any ideas?? The machine will run the program correctly, but backplotter doesn't show it correctly. Thanks in advance!

[SBC Cycle]

What version of BobCAD? To be clear, is it the Verify/Simulation that has the trouble or the Predator Editor G-code Backplot that has the trouble?

Sometimes the PE Backplot is a little funky with G41/G42 cutter comp but most of the time it is spot on. The older versions of BC would not recognize cutter comp in the Verify

[kaleb08]

V25

Well, both the verify/simulation and predator editor do not show the tool stepping over. I mainly use the predator editor for my visual before I send program to machine. So far I have had good luck with the predator editor, this is my first problem with it.

[SBC Cycle]

Can you give me some g-code with the Header to try in my Predator so I can see if it does the same for me?

You can just copy and paste the code here.

Sometime in V25 they fixed the Simulator (the new Sim) to show cutter comp

[SBC Cycle]

One more thing comes to mind. When I open older BBCD files in newer versions the compensation always gets screwed up. You have to reselect System Comp - Off, Machine Comp, Left - On, then recompute.

PITA

[kaleb08]

(TOOL #2)
N39 T2 M06
N40 G90 X1.515 Y-1.765 S5000 M03
N41 G43 H2 D2 Z0.1 M08
N42 G01 Z-0.495 F14.
N43 Z-0.5
N44 Y0.015 F90.
N45 X1.265
N46 Y-1.765
N47 X1.015
N48 Y0.015
N49 X0.765
N50 Y-1.765
N51 X0.515
N52 Y0.015
N53 X0.4551
N54 Y-1.765
N55 G00 Z0.1
N56 X1.77 Y-1.175
N57 G01 Z-0.5 F14.
N58 G41 Y-0.875 F90.
N59 Y0.27
N60 X0.2
N61 Y-2.02
N62 X1.77
N63 Y-0.875
N64 G40 Y-0.575
N65 G00 Z0.1
N66 M09
N67 M05
N68 G91 G28 Z0.
N69 G91 G28 Y0.
N70 T1 M06
N71 M02

(END OF FILE)
(END OF PROGRAM)

[SBC Cycle]

I don't see a G41 in the code. Make sure you are using "Circular" or "Right Angle" for a leadin.

[kaleb08]

N58 has the g41 code. Its following the finish profile.

[kaleb08]

also, did use right angle for leadin. thanks for the help

[SBC Cycle]

Ok, apologies I see it now but I missed it because it doesn't look like a right angle lead. I'm missing something obvious but it's escaping me at the moment. Anyone else?

[mmoe]

I don't usually use machine compensation, but my guess is that you need to have all the header information or the simulator doesn't know what the offsets are supposed to be.

[SBC Cycle]

I probably can't help any further without a file. In V25 the simulation would show the CC move no matter what if the correct leadin and Pattern (System - Off, Machine - On) is used. Looking at the code, the compensated move (N58 G41 Y-0.875 F90.) is followed by another Y move (N59 Y0.27) That would cause an error on my machine. That also tells me that the leadin used was likely "Parallel" not "Right angle". But I'm just guessing without a file to look at.

[Force]

As stated you need to include DIAM_OFFSET in your header

i.e.
(BEGIN PREDATOR NC HEADER)
(DIAM_OFFSET 1= 0.25)
(DIAM_OFFSET 2= 0.3)
(END PREDATOR NC HEADER)

where 1, 2 etc match Tool number

0.25, 0.3 etc = cutter dia