Cube 3D printer discussion > Cube 3D printer discussion
FrankenCube v0.1 Its ALIVE!!!
Dan:
Hi Fritz,
Ill try to make this as simple as possible... Dont waste your time with the cube as is. If you're thinking about it - leap right in. I've had to make quite a few changes to the chassis, heaps to the electronics etc, but geez was it worth it. Print quality to so much superior to what the Cube 2 could do as it was purchased. Im so happy with the results. Here's a pic of the nearly finished product. https://onedrive.live.com/embed?cid=3816C66A7D7D18AA&resid=3816C66A7D7D18AA%212282&authkey=AGFO2y4xry0xM0I
Basically, from a wiring perspective, here's how it goes. Everything wired as a normal Marlin setup would be, however : X and Y endstops MUST be wired to the MIN endstop location on RAMPS 1.4 and the Z must be wired to the Z MAX endstop on RAMPS. Fans (I've used 5) I reused from the ones I pulled out of the original Cube Setup. I used Cable ties to loosely connect the fans to each motor, one around the girth of the motor, then 2 more connecting the fan to the girth cabletie. Then just wired all of them in Parallel to D9 on the RAMPS. Most important is the fan over the RAMPS. If you dont use the fan, your stepper drivers will get too hot and skip steps and the worst possible time. Trust me, just wire it in. As for Firmware, here is the modified firmware im using. The solution in the end was simple, but getting there took days of screwing around. There was no manual or help anywhere to do this, so I had to experiment a lot.
https://onedrive.live.com/embed?cid=3816C66A7D7D18AA&resid=3816C66A7D7D18AA%212281&authkey=AHF_eUTC465Z8m8
If anyone has any questions, or requires detailed pics, please let me know.
By the way, that first one drive link will be where I post pics of this project. Check back often as I'll add more pics as requested and as the project develops.
Regards
Dan
Dan:
Did I mention how quiet this unit is with the new electronics. Basically, from what i can tell, the Cube 2 as is had drivers that were way overdriven (too much amps to motors). THis created vibrations along the Y axis particularly in my unit and made it incredibly noisy. With the Frankencube, I was able to quieten the whole setup by dialing down the current to XYZ motors and adding a fan to each of the motors as well as the electronics. I now have whisper quiet, reliable operation. The Extruder however has full current applied, but as it moves generally so much slower than the other motors, the noise is minimal, even with high current.
fritshgl:
Hi Dan,
Thanks for your information. I will follow your advices.
I will let you know how i am getting along with the project.
Also my cube was very noisy, one of my reasons to change the electronics to open source.
Kind Regards,
Frits
Dan:
You dont *have* to change the electronics to OS to make the motors quieter, but you DO need to strap a fan on the back of each of the stepper drivers and reduce the current by turning the 3 pots on the main board about 1/4 turn anticlockwise. Still there are a billion other reasons to do so - print quality would be the biggest for me.
I figured out the reason the steppers are so noisy is because they are WAY overdriven. The current I ended up with was about half of the original. A rough way to measure this is to use a Multimeter - place one pole on a common earth (Black wire from power supply) and the other in the center of the pot you are testing. A typical value should be between .1 - 2.5v (if the stepper allows). With the A4988 drivers im currently using, I have mine set to about .2v for each Axis and .95 for the extruder. THese figures would not be achievable without cooling on each of the Stepper Motors AND the electronics themselves. I have a fan (cable tied of course) right over the stepper drivers. This printer is now one of the quietest i've heard.
mystuno:
Great project! Looking forward to see your results on this beast!
I would love to hack my Cube Gen1 in some near future. I'm frustrated with this machine as well, lack of parameters to play with.
Thanks for sharing!
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