![]() It’s a triangular shaped PWM being applied to ‘L’ (probably started life as square wave PWM though with the rising edge charging something). ![]() The K40 test button and pot are working, I can vary the max power on the pot and the depth of cut varies. I confirm the issue using the Cohesion3D LCD test fire utility, where no matter what I set (full, half, 1/4, low etc…) I always get 10mA output on the mA meter, and my cuts are always the same depth. I get full power, but when I set up layers in Lightburn to vary the power the mA meter always shows 10mA, even if I set at power level of 3%. Just to clarify I have the Cohesion3D Laserboard, purchased days ago. I am in NE Scotland, just south of Aberdeen. One thing I would like is a full I/O diagram for the Cohesion3D board…so far I can’t find one…only the Mini. ![]() Maybe the logic levels are all over the place. Meanwhile I will scope the PWM signal tomorrow in order to see if the PWM signal is present and/or/if the K40 power supply is able to react to it. I am hoping the Cohesion guys get this sorted for me, I have spent a lot of $ on the Cohesion3D board only to see no control over power!. So, this relies on the K40 power supply being able to accept a PWM switching input whereas it seems to normally be used for a simple on/off control of the laser. I’m assuming that the Cohesion board simply uses PWM to switch this input on/off and thus give control over laser power. The Cohesion3D board doesn’t interface with this signal at all, all it does is enable or disable the laser power via the ‘L’ enable input on the K40 power supply. The ‘pot’ on the K40 provides the 0-5vdc signal to control the laser power. Well, I have done some digging…just a little, but I think I see whats going on (brand new to Cohesion3D, but I’m an electronics guy)…but guess work at this time till I look into it properly.
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