XYZ Printing daVinci Jr 1.0 - HeatBed 110w 9A @ 12V by kr15_uk

Last crawled date: 3 years ago

!!! YOU WILL BE DEALING WITH POISONOUS CHEMICALS SO I'M NOT RESPONSIBLE IF YOU KILL YOURSELF OF PEOPLE/ANIMALS AROUND YOU.
!!! DIY HEATBED COULD BE FIRE HAZARD IF NOT DONE CORRECTLY SO I'M NOT RESPONSIBLE IF YOU BURN DOWN YOUR HOUSE OR SO.
IF YOU DO NOT HAVE EXPERIENCE WITH PCB ETCHING AND ELECTRONICS - DON'T DO THIS! OR GET SOMEONE WHO HAS TO DO THIS FOR YOU.
DIY heatbed for Jr.
***Yes you can buy silicone heaters and stick them to the bottom of the glass but usually that requires some drilling/cutting into the metal base of the bed to get wires routed through.
With this solution you'll only lose 2mm of Z height if done correctly.
!!! Just to set things clear - this isn't step by step tutorial. More like brief description.
If you don't understand what I'm talking about then maybe this project isn't for you!
You'll need:
PCB Clad 165x200mm - Jr glass is 165x165, you can get ones which are 165mm wide already of eBay. You need 1x side to be 200 to cut little tab which will stick out so you can solder wires to it.
All chemicals etc for PCB etching. (Deliberately not mentioning what exactly)
Small handsaw.
Soldering iron
16-18AWG wire
12v PSU - AT LEAST 9AMP
Temperature control board
Relay.
Sharpie
Process is very simple.
Print SVG on regular 2D laser printer (laser printer is a MUST)
Transfer print to PCB clad via iron method.
Fix up imperfections with Sharpie
Draw freehand with Sharpie extension traces for the power input so it sticks out a bit on the right hand side of your Jr bed.
Etch!
I had my thermistor cartridge simply capton taped to on side. Not perfect but good enough for me.
But... You could do freehand traces on the bottom of the clad to get thermistor nicely in the middle with traces going out on the side underneath the power in (that's of course if you have double sided PCB clad)
I've covered all surface with capton tape to give it some kind of a insulation.
Wiring.
I've used cheapest available 12v temp controller board of eBay + ATX PC PSU to power it up.
And relay was wired to Jr exhaust fan to make it somewhat automated. That also ensured the bed is switched off automatically when print is done.
I hope all this makes sense.
P.S.: I'll try to find my heatbed and post some actual photos of it.
I've stopped using it only because Jr is no more. Cannibalised for parts.