1 Topic by toddmuir

  • toddmuir
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Topic: E3D Print Quality Troubles

I finally got my thermistor issues squared away (thanks everybody), and have done a couple test prints with my E3D hotend.  The prints are coming out poorly, with a noticeable squiggle, for lack of a better word, that is the frequency of the extruder steps.  My heat sink does have some play inside of the mount so I've made shims from single layer prints, and wedged them between the heatsink and bottom of the mount, That seems to completely eliminate the slop.  I can put the original hotend in the mount, and get good results, and it fits much better in the mount without any shims.  Nice straight lines without any squiggle.   

This is a partial print of a 20 mm cube:  imgur dot com slash 2NwU4HZ
 
Any ideas on how to get rid of this effect?

2 Reply by COASTER19 (edited by COASTER19 2014-01-28 04:49:03)

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Re: E3D Print Quality Troubles

you need to adjust the small trimpot on the extruder stepper driver on the electronics.  As you are extruding (preferably at a low speed to save filament), twist the trimpot until you hear the pulsing noise disappear.  If you have the Sanguinololu, you can also upgrade to a DRV8825, which completely eliminates the effect.

Refer to this thread for more details: http://www.soliforum.com/topic/4759/new … -problems/

3 Reply by elmoret

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Re: E3D Print Quality Troubles

Its called moire. The E3D has less back pressure, so you don't need to push it as hard.

Do a search - its been covered numerous times.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

4 Reply by MolecularConcept

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Re: E3D Print Quality Troubles

i have a dv8825 set to 1/32 microstepping and still have moire not nearly as bad but its still there

5 Reply by ronsii (edited by ronsii 2014-01-28 05:49:09)

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Re: E3D Print Quality Troubles

toddmuir wrote:

I finally got my thermistor issues squared away (thanks everybody), and have done a couple test prints with my E3D hotend.  The prints are coming out poorly, with a noticeable squiggle, for lack of a better word, that is the frequency of the extruder steps.  My heat sink does have some play inside of the mount so I've made shims from single layer prints, and wedged them between the heatsink and bottom of the mount, That seems to completely eliminate the slop.  I can put the original hotend in the mount, and get good results, and it fits much better in the mount without any shims.  Nice straight lines without any squiggle.   

This is a partial print of a 20 mm cube:  http://i.imgur.com/2NwU4HZ.jpg
 
Any ideas on how to get rid of this effect?



That is part of it, you're also overextruding a bit which makes the moire stand out moire wink

and like coaster says adjust your trimpot for the extruder stepper as it can smooth it out some.