I have just updated my i3 printer with a #00 X 300 heated bed, it worked, it took 12minutes to heat up to 50c.
On given advice I increased the voltage to 24v and added a mosfet module, but this has given me the following problems.
1) the bed heats on power up.
2) it does not stop at the designated temp, just keeps rising, until powered off.
3) still heats when disconnected from controller.
Any help would be greatly appreciated.
Thanks
