Hello, I was able to add my Neje Max 4 device to lightburn using the GRBL driver, and setting Front Left as home. However I’m not able to get it to properly find home.
Can someone please advise?
Can you go to console window and type in $$ and copy paste results here?
Here are my results:
$$
$0=10
$1=255
$2=0
$3=0
$4=0
$5=0
$6=0
$10=3
$11=0.010
$12=0.002
$13=0
$20=1
$21=0
$22=1
$23=0
$24=250.000
$25=2500.000
$26=250
$27=1.000
$30=1000
$31=0
$32=1
$40=0.200
$41=10
$42=10
$43=0
$44=0
$100=100.000
$101=100.000
$102=800.000
$103=44.444
$110=100000.000
$111=100000.000
$112=1200.000
$113=21600.000
$120=1000.000
$121=1000.000
$122=20.000
$123=250.000
$130=700.000
$131=460.000
$132=17.000
$133=360.000
ok
What is your Start From? Are you using absolute coordinates?
Do you have “home on startup” enabled ?
I’ve tried starting from absolute coordinates after manually using the move arrows to get the laser to the front left (as specified for home during device setup). The dummy object was located in the middle of the bed, and this has caused some severe out of bounds grinding.
I’ve also tried starting from Current Location in the middle of the bed with dummy rectangles right next to the laser head, sometimes it doesn’t grind out of bounds, but seems to go to an unexpected location. Something seems off about the way the device is calibrated.
Home on startup is enabled
Do your jog controls work correctly?
They do not. With home being in the position above (max right for x-axis, middle of y-axis, this is the behavior:
Here’s a paste from console doing the sequence above starting with hitting home:
$H
ok
Starting stream
G21
G91
G1 X0 Y-10 F6000 S0
M2
[MSG: Laser temperature:29.3C]
[MSG:Pgm End]
Stream completed in 0:00
Starting stream
G21
G91
G1 X0 Y10 F6000 S0
M2
[MSG:Pgm End]
Stream completed in 0:00
Starting stream
G21
G91
G1 X0 Y0 F6000 S0
M2
[MSG:Pgm End]
Stream completed in 0:00
Starting stream
G21
G91
G1 X10 Y0 F6000 S0
M2
[MSG:Pgm End]
Stream completed in 0:00
I will let someone else guide you, I will likley make things worse.
Heres a gcode guide that might help.
GBRL code.txt (10.0 KB)
Sorry, I’m super new to this - What’s the proper way to use this txt file?
If you turn the machine off and manually (slowly) move the laser head to the middle of the workspace. And then turn the machine on - will it home to the right rear corner now?
I tried it as you suggested. Upon startup and auto-home, the laser module returned to the right side. Here is a video:
I think those machines normally home to the back left?
Have you contacted Neje? Contact Us | NEJE Wiki
It looked like the Y axis started moving back and then got triggered and finished homing, then the X axis went to the right and then stopped - did the X-axis make the grinding noise? (no sound in the video).
With the power off manually move the axis, to check if especially the Y axis movement from front to back is smooth without any binding or issues. If the movement is being restricted somehow that might be enough to trigger the home sensor which I believe detects current spikes.
As for the X axis, I suggest you contact Neje to find out if should be homing to that side, I suspect not if you are getting a lot of noise?
You could try setting the device origin to the rear left (to fix Y jogging direction) and then change X axis home direction with $23=1 (enter $23=1 into the console window)
And clear any G54 coordinate offsets using $RST=#
Thanks for the help, guys - Neje was unable to help. I’m throwing in the towel and got a Xtool S1+ air purifier because I needed something that just worked out of the box for my business.
That’s a shame, as it looked like a very nice machine, and I have seen other recent reports of Neje resolving issues promptly.
On the Neje Max4, the home position is back left.
If you still have it, I can send you a copy of my device configuration file. I have two CO2 and the Neje and I enjoy playing with it.
So far, I haven’t had any issues with it that haven’t been my fault.
I am currently using LightBurn 1.7.08 because I found too many (admittedly minor) issues with the current Version 2.02.
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