I just assembled an Comgrow Z1 5w laser engraver/cutter, and I use a Lightburn trial since that I only have an Macbook running on Catalina 10.15.7, and Lightburn is the only good option for Mac-users.
I manually had to add this GBRL- device in Lightburn.
But the usb-connection between my macbook and the Z1 keeps dropping after a few minutes. Sometimes i get disconnected after one minute, sometimes after five. If lucky i get 10 minutes. And suddenly the machine freezes and connection lost… I
(In english below)
Désolé ami belge, perso j’ai eu le soucis avec un ortur, et changer de câble USB a réglé le soucis.
Je pense qu’il vaudrait mieux voir sur genre des groupes facebook d’utilisateurs de la marque.
Peut-être essayer avec un autre ordi ? Genre un sous un autre OS.
Sorry belgian buddy, I’ve got the same with an ortur, changing USB cable has worked.
Should be better to ask in places like facebook group for komgrow users.
Perhaps try with another computer ?
I now have successfully cut a coaster in about 22 minutes and all went well…
What i did was:
reset SMC on my macbook (should reset the usb-ports)
in Lightburn/Edit/Machine Settings: changed $33 from value 1 to value 0
EDIT : I also set in Lightburn/Edit/Device settings the Transfer Mode to Synchronous, because I thought (and still think) it was a usb-buffering problem…
So for future users of this topic: maybe toggle the “proposed solutions” one by one
This $33:0 was per Comgrow instructions, and should be related to the tilt sensor in the machine… Strange, because $33 is a PWM-frequency-setting…???
I suspect Comgrow has introduced non-standard or rather repurposed unstandardized configuration parameters for their own purpose. So sounds like ultimately this was a case of the sensor raising an alarm and stopping the burn.
Did you ever get an error on-screen about this? How did Comgrow determine this as the fault?
Also, was the SMC reset necessary to fix this or was that precautionary?
No error screen sadly enough. Also all communication between lightburn and the ComgrowZ1 stopped, Lightburn kept “Busy” but frozen…
I got a rather strange mail in very quirky English (I also do not speak English natively, but my sentences are somewhat understandable, I may hope) from Comgrow referring - as good as I could understand with the help of some screenshots - to try and alter the state of $33 from 1 to 0
The SMC reset was maybe even not necessary after all. But hey, one should try the strangest things to get a bricked machine to live again
I have to agree that the fix was to change to synchronous. I was having that same problem getting about a third of the way through several projects and it would lock up. now i just ran two other ones without a problem.
