Topic: Jr heatbed wired internally + unpopulated connectors/parts...
Ladies and gents,
I'm doing heat bed upgrade on my Jr and instead of having 2x PSU's (original one for the printer itself and additional one for the heatbed etc) I've decided simply upgrade existing PSU to higher AMP and wire heatbed internally.
So I've pulled off the back to see where I can tap in on PCB for my heat bed (DC jack to be safe) and there was this unpopulated pin "BedNTC".
That made me think - If it's there is BedNTC then there should be bed power output as well and technically PCB can run heatbed!
Don't shout, calm down... I said technically... I do understand that bed control not gonna appear magically just because I've plugged in my bed. I get that.
But... As we know all limitations on Jr is software limitations so what if you edit 3w gcode like when you add desired hotend temperature but this time to add desired bed temperature (gcode line for bed temp is M140 S"temp") - in theory that could work, in theory...
To test my theory I just need to wire up thermistor, figure out where is bed power output so I can hook up my multimeter and edit gcode with bed temp line in it and see the magic (or nothing at all).
Also looking at the PCB itself, it has quite a lot unpopulated connectors and parts...
Some of them makes sense now (3dLED, CAM R, CAM L, TopHOME, Laser L, Laser R, Motor 3D, Motor E2) after XYZ's announcement back in Jan of Jr 2.0 which has 3D scanner, laser engraver in-built and dual extruder head. I'm guessing it uses the same PCB just with fair amount of extra SMD components.
But what about other connectors, those white ones in the middle or the big unpopulated part with XYZ logo underneath, sd card?!
Anyone figured it out already?!
Thanks.
Regards,
Kris M