Hi.
The laser seems to not be completely off between cuts, but $32 is set to 1.
This happened after the tube change.
VER:1.1f.20211209:]
[OEM:Awesome.tech . MiniGerbil_MG3:]
[SER:MG3_0003.Date:2021209:]
[OPT:VMZL,15,250]
Target buffer size found
Can somebody please help me troubleshoot this?
Kind regards
Was this the only hardware or software change made?
What prompted the tube change?
I suspect the symptoms are caused by a bad LPS. If you have a voltmeter probe the PWM signal from the controller to confirm you are getting 0V at 0% power.
No, on top of that, I have run the PWM signal from the MG3 to the “positive” side of the potentiometer to have manual control over laser power during jobs.
Whats LPS?
Edit:
You were right, after reverting PWM signal from the MG3 directly to the power controll on PSU it solved the issue.
In that case, is there a way for me to wire it so I still have manual control (through pot)?
I’m not super familiar with how MG3 is wired but if it’s sufficiently close to C3D board then take a look at this:
LaserBoard LPSU Connection Guide - Cohesion3D
I don’t think it works as you expect.
You can wire it up like they do for a K40 type…
The pot sets the tube current and the pwm turns the tube on/off at the specified rate. What exactly are you wanting to control?
I’d suggest you use the pwm to control the IN value…
Does your lps have a current limit port…
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