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Hangprinter version 3

Posted by tobben 
Re: Hangprinter version 3
February 09, 2019 10:27AM
Hi guys just wanted to post a quick troubleshooting guide. Since most issues with the hangprinter are the same.

- Heating issues / Overextrusion

1) Calibrate extruder steps.
2) Check wire connections on the extruder end.

- If you're seeing temperature fluctuations:

1) Use thicker wires or double the number of wires connecting to extruder heater

- Bad connections

1) Create a strain relief on the wires on the extruder end ( Hint: Zip ties )

- Motors not working

1) Check connectors. And do a G6 command to test individual motors.
2) Try older version of marlin. Even try the old github hangprinter marlin fork.

- Bad prints, slack, tight lines, vibrations, gross errors in position.

1) Bad calibration. Try to achieve a less than 1mm error in your measurements.
2) Don't use nylon wires. Use the dyneema ones, they're made of ultrahigh-density polyethylene ( balistic fiber ).
3) Slower print speeds
4) Build wooden frame.
5) Use 32 bit board or try klipper with old 8 bit boards ( But at moment there's no kinematic support for the hangprinter)
6) Get creative. Ultrasonic ranger finder to measure distances. 1-2mm steel wire. 3d print a wire tensioner or even use a arduino to measure wire tension.

On a side note. The hangprinter deals better with organic shapes or prints that don't need a great deal of accuracy. Here's a little encouragement video from Saurabh Sogi: [www.youtube.com]

Edited 3 time(s). Last edit at 02/10/2019 03:09PM by LordThingol.
Re: Hangprinter version 3
February 16, 2019 08:33AM
Finally first Print !!
Next Stage : Improve dimensional accuracy through some calibration !!
open | download - 52781886_2209702915947520_9177792125922705408_n.mp4.mp4 (127.5 KB)
Re: Hangprinter version 3
February 16, 2019 09:16AM
There's a lot of hours of HP wisdom in that post. Greatly appreciated!

Awesome work!

Re: Hangprinter version 3
February 21, 2019 11:41PM
@tobben, All the credits goes to you smiling smiley
Re: Hangprinter version 3
March 25, 2019 05:20PM
is there a smart stepper firmware with the recent 0.39 updates?
Re: Hangprinter version 3
March 29, 2019 04:50PM
Not that I know of. I think Trampas might be working on including HP support upstream, but you have to ask him to get the exact status.

Re: Hangprinter version 3
April 13, 2019 10:13AM
Howdy everyone.

I'm revisiting this project after a long hiatus and moving locations.

Upon setting up the hangprinter again, i'm running into the same issue as I was before where when making Z-axis moves (G1 Zxx), the A, B, and C spools do not move proportionally to keep up with the D spool.

I have checked my stepper drivers and the jumpers were all identical on the bench, and the all appear to be set to 1/16 stepping. (DRV8825).

Does anyone have any suggestions for what to troubleshoot next? I'm so close to the finish line.

Calibration values below:
ANCHOR_A_Y -1345

EDIT: It appears that my DRV8825s are still stuck in 1/32 stepping even after changing the jumpers around.

Edited 1 time(s). Last edit at 04/14/2019 11:42AM by Alandaeta.
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