Welcome! Log In Create A New Profile

Help no voltage on hot end (D10) and heat bed (D8) RAMPS 1.4

Posted by Gito

Gito

Help no voltage on hot end (D10) and heat bed (D8) RAMPS 1.4
March 04, 2014 04:27AM

Registered: 10 years ago
Posts: 11

Hello all, I was working Mendel prusa i3 with RAMPS 1.4 with sprinter firmware and Switching power supply 12 V 29A.
I have a problem with heat extruder (D10) and heat bed (D8).
I was pressing the heat and bed sets abs (230 C) on pronterface, then I measure the D10 and D8 no voltage (0V) LED 4 and LED 2 is lit. I measure in R13 there is no voltage (0V). Someone can help me about this problem? Thank you.

Reply Quote

Cefiar

Re: Help no voltage on hot end (D10) and heat bed (D8) RAMPS 1.4
March 04, 2014 04:43PM

Registered: 14 years ago
Posts: 1,092

Were you measuring between both terminals of D10/D8 or from one terminal and ground? You need to measure from one terminal to the other.

The FET's switch the ground line, so the switched line will ALWAYS read 0 (either not connected, or shorted to ground).

Reply Quote

Gito

Re: Help no voltage on hot end (D10) and heat bed (D8) RAMPS 1.4
March 27, 2014 06:25AM

Registered: 10 years ago
Posts: 11

Thank's ceviar sorry, I just had time to reply to a message. The problem has been resolved. The reason I use the extruder made in china, no thermistor in extruder. So pronterface not detect the temperature and the voltage at the D10 does not want to pull out the power to the heater. Thank's