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HY-T50 power supply problem

Hi

i have a problem with my cnc laser and minigerbill board

The board works perfecty with lightburn, but i have little power from tube .... at 20% of power, i see the laser dots, and at 100% power is too little power, and don't cut 3mm of mdf

this is the electrical connection for my psu (model:HY-T50) .... i thik the pwm frequency is incorrect ... can you help me? i tried to change $28 parameter but works as before ...

ps. i'm italian and my english isn't very good...i'm sorry for this

Uploaded files:
  • alimentatore_laser_hy-t50_potenza_nominale_50w_1.jpg

I solved the problem by wiring as the diagram below.

Now i have minor issues for grayscale engraving...i have a good result with $28=5 (original value) and $30=2000
I continue to work to find a good $30 value to have a good garyscale engraving

 

 

 

 

Uploaded files:
  • HY-T50-Gerbil.jpg

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