Problems switching from lightburn to CM

[LewTube (Lew)]

Shapeoko 3XXL has run flawlessly up to a few weeks ago.

Installed JTech Pro 7W laser.

Using Lightburn to run the laser.

CC 743 CM 575

The first time switching back Shapeoko was all over, would not jog properly, Z axis wouldn’t move at all. After searching the forums I found a few threads on creating a macro in lightburn “Use CNC” with the following parameters $10=255

$32=0

G10 L2 P1 X0 Y0

I set up my work piece, X & Y are correct without resetting. Set my Z zero using the eyeball method. Load file, install 1/4" 201 and machine runs over to bitsetter as usual.

Project is set, first cut is 2 oval slots 25.5mm deep on a 25mm board.

Everything seems OK until about the 26mm mark where it just keeps going. I stopped it at 38mm (that is 12mm into the spoilboard).

This has happened the last 3 projects. Any idea what is going on?

[LewTube (Lew)]

If it makes a difference,

running software on a macbook & 3XXL has HDZ

[Julien]

The switch back and forth between laser mode and CNC mode should not alter the Z.

When this happens does the job’s first pass start at the correct height ? If not the Z zero was altered since you manually set it, which may have been because of an incorrect sequence when using the bitsetter (like inserting a new tool without using the change tool button in CM)

If the Z zero seemed correct but it cut at the wrong depth, you may want to check the Z settings in GRBL (open log window, go to MDI tab, send $$, the value for Z steps per mm shows up as $102 and should be 320 for a HDZ)

If you have no strong need to preserve X/Y/Z between your laser job and CNC jobs, I would advise that you reinitialize the machine when switching modes, just to be on the safe side and avoid any possible side effects from using Lightburn. This is not strictly necessary if you diligently use the “Use CNC/Use Laser” macros, but better safe than sorry.

[LewTube (Lew)]

Thank you Julien,

First pass is correct depth.

I am on my way out to the shop to give this a try. (10F out there this morning)

[LewTube (Lew)]

Before doing anything

$$
$0=10
$1=255
$2=0
$3=2
$4=0
$5=0
$6=0
$10=255
$11=0.020
$12=0.010
$13=0
$20=0
$21=0
$22=1
$23=0
$24=100.000
$25=2000.000
$26=25
$27=3.000
$30=1000
$31=0
$32=0
$100=40.000
$101=40.000
$102=320.000
$110=10000.000
$111=10000.000
$112=1300.000
$120=500.000
$121=500.000
$122=100.000
$130=845.000
$131=850.000
$132=150.000
ok
N0 G4P0.5
ok
$#
[G54:0.000,0.000,0.000]
[G55:0.000,0.000,0.000]
[G56:0.000,0.000,0.000]
[G57:0.000,0.000,0.000]
[G58:0.000,0.000,0.000]
[G59:0.000,0.000,0.000]
[G28:0.000,0.000,0.000]
[G30:0.000,0.000,0.000]
[G92:0.000,0.000,0.000]
[TLO:0.000]
[PRB:0.000,0.000,0.000:0]
ok
$G
[GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
ok

After complete reboot, initialization, probe set all 3 zeros and bit setter sequence.

$$
$0=10
$1=255
$2=0
$3=2
$4=0
$5=0
$6=0
$10=255
$11=0.020
$12=0.010
$13=0
$20=0
$21=0
$22=1
$23=0
$24=100.000
$25=2000.000
$26=25
$27=3.000
$30=1000
$31=0
$32=0
$100=40.000
$101=40.000
$102=320.000
$110=10000.000
$111=10000.000
$112=1300.000
$120=500.000
$121=500.000
$122=100.000
$130=845.000
$131=850.000
$132=150.000
ok
N0 G4P0.5
ok
$#
[G54:0.000,0.000,0.000]
[G55:0.000,0.000,0.000]
[G56:0.000,0.000,0.000]
[G57:0.000,0.000,0.000]
[G58:0.000,0.000,0.000]
[G59:0.000,0.000,0.000]
[G28:0.000,0.000,0.000]
[G30:0.000,0.000,0.000]
[G92:0.000,0.000,0.000]
[TLO:0.000]
[PRB:-771.875,-759.025,-23.788:1]
ok
$G
[GC:G1 G54 G17 G21 G90 G94 M5 M9 T0 F300 S0]
ok

Run CM and it blows right through the material into the spoilboard.

Started at correct depth.

Rechecked CC to make sure thickness of material correct a few times and reloaded the file into CM.

Very strange.

[Julien]

Extremely strange that anything making the job fail would stick after a reboot/re-home, but if it is the case you may want to re-send machine configuration, if only to rule out the possibility of an altered machine configuration? (the GRBL params look ok though)

[neilferreri (Neil Ferreri Ω)]

Can you share one of your gcode files?

[LewTube (Lew)]

re G Code

An error occurred: Body is limited to 32000 characters; you entered 268414.

nc file attached

G-Code Files.nc (262.1 KB)

[LewTube (Lew)]

It blows through on the first item, I didn’t let it go any further.

I tried a different file (simple 3" circle with tabs) same thing, I caught it as it went through all the tabs.

I have downloaded the trial version of CC Pro. Same issue before and after CC 743 & CC Pro 743.

I REALLY appreciate both of you taking the time to help me with this.

Lew

[neilferreri (Neil Ferreri Ω)]

And you have the HDZ, not the Z-plus?

[LewTube (Lew)]

I just went and checked

Z-Plus not HDZ

[neilferreri (Neil Ferreri Ω)]

@LewTube

Z-Plus not HDZ

That’s the issue.
Your $102 is incorrect.
For the Z-plus, it should be $102=200
That’s your Z steps per mm.

[LewTube (Lew)]

That is amazing detective work! Thank you!

Where would I change that?

[neilferreri (Neil Ferreri Ω)]

I think you can just rerun the machine configuration from within Motion. I believe Motion wants to know which Z you have as well.
Disclaimer: I don’t use Carbide Motion, so maybe someone else can chime in.

[LewTube (Lew)]

I finally got back out to my CNC today as it has been -30 in the shop over the last week.

I reconfigured the machine through CM and it cuts perfectly.

THANK YOU FOR YOUR HELP!