Machine: Custom 6030 build
Power supply: Cloudray HY-T60 Plus 60W
Laser Tube: TEN-HIGH “60W” 1000mm/50mm diameter
External Stepper Drivers: Stepperonline DM542T
Problem/ Question: Any problem with using the 0-5v out from the Alternate PWM pins?
Motion is working great, started on wiring the LPSU. (Not currently hooked up until I have satisfied my understanding of the whole system)
I understand the typical method is to wire 5V and a pot to the IN on the LPSU to set the max current of the laser.
The Laser fire wired to the TL uses a duty cycle to turn the laser on and off rapidly to simulate power control.
Essentially, the TL is laser on/off, using PWM sort of fakes a power level for the beam.
The IN on the LPSU is a true power level driven directly by 0-5V.
Using my multi meter to check the Alternate PWM pins I notice it scales 0-5V nicely based on the power level of the cut settings.
My thought was why not wire those connectors to the IN and G on the LPSU, also with a pot to control max power?
In theory this would allow proper grayscale laser control, and allow power control to engrave and cut sending all operations for a job in order. No need to set the power level for engraving on the pot, run the operation and then set power for cutting and run the next operations.
I did check to see if there was a common ground on the Alternate PWM output pins. It looks like they share ground with the USB connection only. The ground for the stepper drivers, machine frame and the Laser connector pins are isolated.
So, would there be an issue using these pins and the grounding differential?
What are the use cases for the Alternate PWM pins, I haven’t seen any references on the forum or documentation.
Worst case I think I could use an op amp as a voltage follower to read the Alternate PWM output and isolate it safely to the IN/G on the LPSU.