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04-01-2014, 07:22 PM #1
- Join Date
- Feb 2014
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- 18
Strange problem with ABS, Stepper heating up
Hi everyone
(Makerfarm 8") Ramps 1.4, NEMA 17's
I'm relatively new to 3d printing but so far have been able to print PLA with great success. All my steppers remain cool to the touch and prints come out great.
I decided to try printing in ABS the other day and for whatever reason the stepper on my extruder becomes extremely hot about 10 minutes into the print. Also noticed temps are going up very slowly and dropping when the fan kicks on. (factory settings)
If i try adjusting it on the board it just stops working so I'm as low as I can possibly go with it still functioning.
Switch back to PLA, no problems at all.
My ABS prints are coming out great, my only issue is the stepper motor becomes too hot to touch for more than afew seconds
Any help would be appreciated.
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04-01-2014, 07:46 PM #2
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- Feb 2014
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- 18
I'd also like to add that now my jhead is holding strong at 225 but my bed has dropped from 110 to 97/98 and wont go any higher. It starts out right and slowly drops.
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04-01-2014, 09:09 PM #3
- Join Date
- Oct 2013
- Location
- Honolulu, HI
- Posts
- 199
I use fans on my extruder steppers. They easily keep the heat down. Without the fan, the steppers get hot enough to burn my fingers.
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04-02-2014, 02:49 AM #4
1. If the fan you are talking about is the fan blowing on the extruder head, disconnect the fan from the RAMPS board and connect it directly to either one of the power input points from your power supply. That way, the fan will always be on and the temperature of the extruder will stay constant.
2. If it is the stepper motor that is heating up, then there is too much current going through it. You will have to adjust the variable resistor. Look here ( http://3dprintboard.com/showthread.p...formance/page2 ) for discussions about doing that.
3. For your problem with the printer bed, it is not getting enough current. Get a 12V horn relay from an auto shop and wire the relay between your power supply and bed. Use connections from D8 on the RAMPS board to switch the relay on and off.
DO NOT PUT A RELAY BETWEEN THE POWER SUPPLY AND EXTRUDER HEAD. You'll end up frizzling your Arduino board.
Old Man EmuLast edited by old man emu; 04-02-2014 at 02:52 AM.
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04-02-2014, 05:34 AM #5
Well you can check your stepper driver for how much current it is getting,
But these motors are kinda normal to run that hot, also so far i have heard, how slower the movement in a long period, How hotter it will become.
As heated bed goes, for me it stays between 107-110. You could try a relay like Emo said.
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04-02-2014, 04:04 PM #6
Hey!!!!
This is Old Man Emu:
I'm waiting!.jpg
This is an EMO:
Emo.jpg
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04-02-2014, 05:34 PM #7
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- Feb 2014
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- 18
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04-03-2014, 01:54 AM #8
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04-03-2014, 05:07 AM #9
- Join Date
- Feb 2014
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- 18
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04-03-2014, 05:51 AM #10
- Join Date
- Oct 2013
- Location
- Honolulu, HI
- Posts
- 199
I have my extruder motor fan wired directly to the power supply and simply tie-wrapped directly to the motor. It turns on when the power does. My nozzle fan I left in place.
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