While deeping into Moshidraw 2014, (not easy task because poor manual),

Lasers
,
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While deeping into Moshidraw 2014, (not easy task because poor manual), I am looking at future possible mods.

good news the latest K40 power supply (MYJG40W) accept PWM and 5V analog out control.
http://en.jnmydy.com/products_detail/&productId=3818917a-64be-4cb5-985e-6dc249ad7414.html

Potential candidate could be with an Arduino shield from Mr BEAM. Got some 5v available from PSU. need to look into the steppers specs and compatibility.
if Mr Beam agreed to make them available to a large K40 users base. Maybe a kit with RaspeberryPi + UNO + Shield + open source Software (cut &raster).
or just Shield & soft. (the rest could be source locally)

hopefully the price could stay entry level to go with the $430/€365/£275 of the K40 on ebay.

but I have read from Brook or Nils the software is still to come …
Will it become a standard like Octoprint did ?

other mod I am thinking about is a moving Z for focal setting inspired by China Laser Cutter From Ebay Adjustable Lens Mod. DCK40III - YouTube , that could be combine with 3D printed air assist a bit like this one .CO2 Laser Air Assist Nozzle 40W by webghost - Thingiverse

I could design that one to be 3D printed.

@Nils_Hitze @Brook_Drumm @Mr_Beam @foosel

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Can you please explain how to hook up PWM and 5V analog out control; on this unit?

That would go a long way for me to getting my DSP up and running without having to drop $235 USD on a replacement PSU.

Thanks !

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I have a similar power supply. The PWM signal goes to the input marked “IN”.

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I couldn’t get the laser to fire when hooked into in. I have the ground wire from the supply 6 pin to the big mosfet power in. Then supply in is connected to the ground on p2_5. That did nothing for me. so i changed “in” to “L” and got the laser to fire. 10% was about 5mA, 20% was about 7mA. Any idea what i am missing? stop points are good. and steppers move well. Just haveing trouble with the laser fire. I have same supply as you do. what is your 5v on the 6pin connected to?

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the red In(5) and the blue 5v (6) go to the potentiometer with the green L. all three wires are the thinnest.

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This might be what I’m looking for, If the pot is used just for control voltages, can I used a much lower wattage pot?

I’d either like to control a dual motorised pot from an arduino (reading the second output to determine pot position for current)

Or PWM directly, is there an actual example fo someone doing this?