Cube 3D printer discussion > Cube 3D printer discussion

Ramps Upgrade to a gen 1 cube

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rvalotta:
Its been a bit since I've had time to work on this... Here is what i've accomplished today.

Added connectors to all the steppers, limit switches, and thermistors. This was fun since i really didn't have much around except from servo extensions... These were cut / glued to size and connected to the 3d printer using just heatshink.

As for power i am, for now, using a ATX power supply. I'm supplying 12V to the board via 12V1 and 12V2 each able to give 22 amps.

I have stopped here as it appears i did not get anything to adhere the heatsinks to the stepper drivers. Not sure what i'm going to do. Thinking i might just use the adhesive/surface tension force of arctic silver and hope for the best.

Hoping to learn more about configuring marlin for this printer and seeing if i can get the extruder/bed to reach temp. 

rvalotta:
Well my inexpensive upgrade of the cube just took a $200 Hit. I toasted my extruder... didn't realize the fan was not spinning.... Live and learn...

Trying to see if the extruder would get to temp on 12V without a fan is a BAD idea.

rvalotta:
So after hours of banging my head and wondering what i was doing wrong... I finally have the xyz motion working as expected.   Allow me to share a few things I learnt on the way.

1) Use a known good to begin with Dan's frankencube marlin install for example
2) If things still go wrong odds are something is **** up
- I over tightened one of the limit switches so it never registered as having reached it limits.
3) Thermal paste is conductive

I hope someone gets a chuckle at the torture i went through today.

fritshgl:
Hello Rvalotta
Some remarks.
- The cube thermistor is a 200k thermistor.
- I think the fans do not like the 16 volt, I used 19 volt supply and 12 volt for the fans.
- 12 volt supply is to low for the hot end, 16 volt should go
- First runs with low speed I suggest.
- I have very good results with 0.2 mm layer.

good luck,
Fritshgl

Dan:

--- Quote from: rvalotta on May 27, 2015, 06:55:04 pm ---Well my inexpensive upgrade of the cube just took a $200 Hit. I toasted my extruder... didn't realize the fan was not spinning.... Live and learn...

Trying to see if the extruder would get to temp on 12V without a fan is a BAD idea.

--- End quote ---

Eeeek! you killed a $2.50 thermal fuse.  Just bypass it (short the cables leading to and from). You'll find it wrapped around the hotend.  If the thermal fuse blows due to excessive heat, the hotend gets no power.  I did exactly the same thing.  Marlin firmware does have a failsafe against this anyway. 

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