Replaced extruder motor, AMAZING difference

A space for working on issues specific to Series 1. Includes Beta groups and production machines.

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razzle
Posts: 45
Joined: Tue Aug 19, 2014 12:47 pm

Replaced extruder motor, AMAZING difference

Post: #8449 razzle
Tue Apr 21, 2015 2:19 pm

I have fought inconsistent extrusion for a while with my Series 1. Replaced the extruder driver with the DRV8825, went back to the A4988, Moved up to the black edition of the A4988. Put a fan on the drivers. Changed out the extruder motor with a new NEMA 14. But still i would get random skipping and weak extrusion. Sometimes it would work great and sometimes it would go weak and skip in the middle of a print, then go back to normal.
I finally decided to buy a high torque NEMA 14 motor from www.omc-stepperonline.com. This is a 56 oz-in motor in a NEMA 14 size (longer than the original NEMA 14). What a difference. My latest 8 hour print is flawless. Extrusion was consistent and really high quality. A fabulous upgrade at $20.

For everyone's info it is listed at $13.96 + shipping at http://www.omc-stepperonline.com Part number 14HS20-1504S
1.5A so i would highly recommend you upgrade to the black edition of the pololu A4988. It has a higher amperage capacity and heat tolerence.

May not be for everyone, but if you have fought with inconsistent extrusion but have not been able to fix it any other way, here is an easy and inexpensive solution.

mrSEADEMON
Posts: 137
Joined: Fri Apr 18, 2014 9:35 am
Location: BY Minsk

Re: Replaced extruder motor, AMAZING difference

Post: #8456 mrSEADEMON
Wed Apr 22, 2015 12:57 pm

I think the motors replace all such

Espen
Posts: 58
Joined: Thu Oct 11, 2012 11:12 pm
Location: San Francisco, CA
Contact:

Re: Replaced extruder motor, AMAZING difference

Post: #8457 Espen
Wed Apr 22, 2015 1:04 pm

Awesome feedback - we are looking into this. Thanks razzle!

mrSEADEMON
Posts: 137
Joined: Fri Apr 18, 2014 9:35 am
Location: BY Minsk

Re: Replaced extruder motor, AMAZING difference

Post: #8478 mrSEADEMON
Thu Apr 30, 2015 5:07 am

and what settings for drivers of these motors? 0.42 also for the driver? original motors found only in PDF description
http://bcndynamics.com/sites/default/fi ... -1684A.pdf
somehow in amperes it is more powerful than these new motors :(
to calculate only found a reference to the formula
А*0,4

razzle
Posts: 45
Joined: Tue Aug 19, 2014 12:47 pm

Re: Replaced extruder motor, AMAZING difference

Post: #8479 razzle
Thu Apr 30, 2015 5:36 am

I am running it at 0.51. That seemed to be the smoothest when i tuned it. And the motor doesn't even get very warm, even during a 14 hour print. Unlike the original motor, which would be really hot, even running at 0.42.

ccrome
Posts: 410
Joined: Thu Jul 25, 2013 5:37 pm

Re: Replaced extruder motor, AMAZING difference

Post: #8480 ccrome
Thu Apr 30, 2015 6:24 am

Nice. I just ordered one.

-Caleb

mrSEADEMON
Posts: 137
Joined: Fri Apr 18, 2014 9:35 am
Location: BY Minsk

Re: Replaced extruder motor, AMAZING difference

Post: #8481 mrSEADEMON
Thu Apr 30, 2015 1:44 pm

Thanks. I orderd 5 :) i think change X Y and extrusion motors. And one to the second hot end

jd_3d
Posts: 629
Joined: Fri Nov 09, 2012 12:30 pm

Re: Replaced extruder motor, AMAZING difference

Post: #8485 jd_3d
Sat May 02, 2015 10:18 am

Let us know how they perform mrSEADEMON :)

mrSEADEMON
Posts: 137
Joined: Fri Apr 18, 2014 9:35 am
Location: BY Minsk

Re: Replaced extruder motor, AMAZING difference

Post: #8486 mrSEADEMON
Sat May 02, 2015 6:46 pm

I change X motors and Extruder motors. Work good. but need more test. Y motors change in next time

Fast one
Posts: 57
Joined: Fri Feb 20, 2015 12:24 pm

Re: Replaced extruder motor, AMAZING difference

Post: #8496 Fast one
Mon May 04, 2015 10:35 am

There seems to be a lot of friction between the filament spool and it's holder, the filament also drags along the front top edge of the cross support bar over the extruder. I wonder if the Series 1 designers experimented with bearings to reduce this friction.


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