Shifting and hot electronics

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toonlumberjack
Posts: 12
Joined: Fri Aug 12, 2016 8:22 pm

Shifting and hot electronics

Post by toonlumberjack » Fri Aug 12, 2016 8:30 pm

My first bigger print on my second day with Felix 3.1. failed.

Reading the forum posts and online help, I am nearly sure, the stepper motor driver ICs overheated.

You can burn your fingers by touching them even after the firt 5 minutes running the print:

The elephant cell holder attached should be printed in 4hours, around 3hours it started with "Lines on the Side of Print" and a few layers later it shifted.

There are potentiometers on the board, but i cant find a documentation about them.

What can i do?

Best regards
Sven
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aikx
Posts: 45
Joined: Sun May 13, 2012 1:14 pm
Location: Cologne, Germany

Post by aikx » Mon Aug 15, 2016 10:06 am

toonlumberjack wrote:...There are potentiometers on the board, but i cant find a documentation about them.n
There is documentation in the manual /assembly instructions.
1. Turn the screw fully counter-clockwise.
2. Turn it clockwise a quarter turn.
This will give a good starting point for finetuning later.
from Instruction_Manual_of_Felix_1_5b_v2.pdf

toonlumberjack
Posts: 12
Joined: Fri Aug 12, 2016 8:22 pm

Post by toonlumberjack » Tue Aug 16, 2016 7:48 am

aikx wrote:There is documentation in the manual /assembly instructions.
1. Turn the screw fully counter-clockwise.
2. Turn it clockwise a quarter turn.
This will give a good starting point for finetuning later.
from Instruction_Manual_of_Felix_1_5b_v2.pdf
I am not sure about that. The part was printed correct ~3h out of 4h. I did a little bit of research and probably it's an different problem.

Thank you very much for your reply, aikx. But i think this isn't solving the problem.

aikx
Posts: 45
Joined: Sun May 13, 2012 1:14 pm
Location: Cologne, Germany

Post by aikx » Tue Aug 16, 2016 2:38 pm

toonlumberjack wrote:
aikx wrote:I am not sure about that. The part was printed correct ~3h out of 4h. I did a little bit of research and probably it's an different problem.
After 3h the stepper motor driver ICs overheated and stopped working, maybe some seconds the running move-signals are ignored. After that the print is shifted. :-(
Decrease the current the driver ICs!

matthijs
Posts: 7
Joined: Mon May 02, 2016 2:36 pm

Post by matthijs » Tue Aug 16, 2016 3:17 pm

Hi,

Check the assembly manual, page 29 (step 89).
It shows a picture of trim potmeter settings that usually work.
You can download the manual here: http://www.felixprinters.com/downloads/ ... IX_3.1.pdf.

toonlumberjack
Posts: 12
Joined: Fri Aug 12, 2016 8:22 pm

Post by toonlumberjack » Wed Aug 17, 2016 8:39 am

matthijs wrote:Hi,

Check the assembly manual, page 29 (step 89).
It shows a picture of trim potmeter settings that usually work.
You can download the manual here: http://www.felixprinters.com/downloads/ ... IX_3.1.pdf.

I am aware of the settings and double checked them.

matthijs
Posts: 7
Joined: Mon May 02, 2016 2:36 pm

Post by matthijs » Thu Aug 18, 2016 8:20 am

Ok. Clockwise is more current, counterclockwise less.
Every trim pot is positioned near the corresponding driver.
The drivers are designed to withstand high temperatures, so they can become very hot to the touch without issues.
When they overheat, they shut down for a few seconds. That can cause shifts, because the printer is unaware of this.
If there is no good reason to drive the steppers very hard, it is safer to tune down the current a bit. But not too much, it should be not too easy to manually push the axes from their holding position when the steppers are enabled.

LulaNord
Posts: 1
Joined: Thu Jun 08, 2017 6:49 pm

Post by LulaNord » Thu Jun 08, 2017 6:53 pm

Hi...i am a new user here. It seems the stepper motor driver ICs overheated and stopped working, maybe some seconds the running move-signals are ignored. After that the print is shifted.
I think you should decrease the current the driver IC.

circuit assembly

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