Thanks for your tips, it turns out that the resistance in my heater was only 0.75 ohms. I built a new HBP with around 1.2 ohms and tested it by plugging it into the power supply by itself - and, sure enough, this one only pulls 10A. My new RAMPS 1.4 board arrived last Friday. I wrangled a small heatsink onto Q3 and put the board into an enclosure with a fan. So far, I've had it running for two hby Stamperl - RAMPS Electronics
I managed to fry my RAMPS board by plugging in a heated bed. A new board is on its way, but if anybody has some tips on how I can avoid a repeat performance and drive a heated bed safely, I should be very grateful. Here's my setup: - This Graupner powersupply, set to 12V and 16A, with a split soldered into the positive and ground cables and connected to the 11A and 5A connectors on the RAMPS -by Stamperl - RAMPS Electronics
Lanthan Wrote: ------------------------------------------------------- > > pin 1 -- black -- motor1 --green -- black -- motor2 -- green -- pin2 > pin3 -- red -- motor 1 -- blue -- red -- motor2 -- blue -- pin4 I'm having the hardest time parsing this chart (and since the Z motors are all that's missing from my Prusa, I'm pretty keen to find out!) Is it the wiring in my attachment coby Stamperl - General Mendel Topics