1 Topic by spiralsandwich

  • spiralsandwich
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  • Registered: 2018-11-22
  • Posts: 2

Topic: Swapping Da Vinci 1.0 Board with Pi?

I have a Da Vinci 1.0 running Repetier, otherwise more or less factory standard issue.
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I think I blew the on-board fuse that powers the extruder head plug.  In fact, if my multimeter is to be believed, this is exactly what I did.  Tried today to fix this issue with a jumper, but Parkinson's had other ideas.  Now I have 1) a printer that doesn't heat at the extruder but is otherwise fine and 2) a giant mess (ok, a really small, annoying mess).
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So, I was looking into replacement boards because I figured the cost would be lower than my frustration is worth to try to make this board work.  Looks like factory board is $150, but RAMPS is like $40....
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I already have a Raspberry Pi running with this machine.
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How much effort would be required to make that Pi B+ power the printer directly?  I see a bunch that run RAMPS through an Arduino (yeah yeah, it's in the name...) but I don't see anything similar for Pi. 
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I will be the first to admit I'm no expert here, I just want to get my printer back up and going, I can handle a little coding and lots of hardware that doesn't involve sloshy things like soldier or glue.  Ha ha (Parkinson's joke ... ba dum bum).
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The other thought I had was that maybe there's somewhere on that board i can pull enough juice to split off a lead to run to the extruder plug directly.  Obvs. it would need a fuse of some sort so I didn't burn the neighborhood down, but I can't find a circuit diagram to tell me where to go grab that from. 
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Any ideas?  This horrible thought would basically be a splice off of the power supply or from a point on the board where the power has already been stepped down to the right level.
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Long time reader, first time poster. 
~K

2 Reply by MindRealm

  • MindRealm
  • MindRealm
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  • From: Virginia
  • Registered: 2019-03-04
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Re: Swapping Da Vinci 1.0 Board with Pi?

A couple bits of advice...

1- Don't pursue using the Pi to control your printer. The RAMPS boards plug directly into Arduino Mega 2560, and has well established firmware built for controlling 3D printers. Much less effort, better support and frequent firmware updates (Marlin), plus the ability to add goodies like fans, LEDs, displays, etc. make the MEGA/RAMPS combo the better choice.

2- The hot end is not simply fed voltage to heat up the filament, so finding spots to apply a jumper is problematic. The controller uses a MOSFET to control the voltage to the hot end. Instead of varying the amount of voltage (i.e. how many VOLTS are applied), the MOSFET sends varying pulse widths to regulate the temperature of the hot end. If there is a MOSFET failure, you will still have positive voltage getting through the fuse, but the negative (DC ground) will not be passed to the hot end.

http://soliforum.com/i/?3YlNeNm.jpg

(I'm happy to look into repairing your board...)

3 Reply by DraakUSA

  • DraakUSA
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  • Registered: 2021-03-11
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Re: Swapping Da Vinci 1.0 Board with Pi?

Check out this webpage... http://www.techmonkeybusiness.com/frank … oller.html