Sewyboowy

Comments

• So ive got an external mosfet and installed it, but im getting the same problem still. Any ideas, im really stuck and struggling to get this fixed. Thanks

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Here is the picture of my wiring of the power in and bed out

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Im doing a normal print at the minute, so cant send pictures quite yet, will do when its done, but the 12V cables aren't hot at all at the minute. Yeah theres two 12V wires and two grounds on ramps. Would an external mosfet solve the promblem like t…

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• the fan didnt do much unfortunately. lots of people on forums are mentioning mosfet upgrades for the heated bed with a separate board. Maybe i should get one of those?

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Its a glass bed 25cm in diameter. Im not sure what u mean about the type of heater but it was a stick on sheet. The wiring is the standard ramps 1.4V wiring, anything to look out for with regards to wiring? I see, ive added a fan temporarily over t…

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• After letting it sit for a while, i can make both the hotend and extruder get up to temperature, but when i start a print and the motors start moving, the temp drops again. Is it possible the ramps could be overheating and then thermal throttling so…

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• The two big square yellow components (capacitor?) are also very hot

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• voltage when heating (measured at 35 degrees) is 11.2V and drops to 11.07V when hotend is turned on. The connector does feel a little hot actually

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• here's a graph of what happens. if its not the ramps 1.4, maybe could it be that ive wired up my psu incorrectly? Ive used the positive and negatives from the CPU power cable coming from the psu

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Im getting the same problem unfortunately. I set the bed to 70 degrees and then turned the hotend on, then the bed started to lose its heat and the temp drops. Maybe the ramps board cant supply enough for the bed and hotend at the same time?

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Ive just swapped out the power supply, ill see if it works! 

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• i have a much newer corsair 600W power supply with a +12V 46A rail and -12V 0.8A rail. Shall i change them over? What is the -12V 0.8A rail for? Thanks

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• 10.75V it got to 88 degrees without the hotend on

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• sure

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• it got to 88 degrees

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• its an old 350W atx psu, it has 2 18A 12v rails. Maybe thats not enough? Im seeing how hot i can get the bed now. Yes its always targeting 70 degrees during print

  in Heated bed temp drops when print starts Comment by Sewyboowy September 2017
• Thanks!

  in Delta "un calibrates" during print Comment by Sewyboowy April 2017
• in Delta "un calibrates" during print Comment by Sewyboowy April 2017
• in Delta "un calibrates" during print Comment by Sewyboowy April 2017