Select mini retraction issues

Rob_Brennan · 2017-01-23T01:48:08.000Z

I am using Cura 2.3.1 on a select mini and having problems with retraction/ oozing. I have tried changing the retraction and retraction prime settings and it makes no difference.

I have printed this 5x with 5 different settings and the outcomes appear identical.

Any suggestions?

Thank you

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Just3D · 2017-01-23T11:20:53.000Z

What material and what nozzle temp?

HexKrak · 2017-01-23T15:22:01.000Z

Retraction speed is sometimes more important than distance. You’re looking to create negative pressure rather than actually removing the filament. What is your retraction speed set to?

Rob_Brennan · 2017-01-23T16:03:39.000Z

Retraction speed I have tried from 35 to 70(max) mm/sec

Rob_Brennan · 2017-01-23T16:04:47.000Z

Using mono price PLA and have tried from 190 to 205C

Rob_Brennan · 2017-01-23T16:07:40.000Z

And I have tried 4 - 8mm retraction and retraction prime from .1 to 1

Ahaber · 2017-01-23T16:11:18.000Z

What speed are you printing at, and have you checked your extruder gear to make sure that it is clean?

John_Donegan · 2017-01-23T16:11:32.000Z

Nevermind, others beat me to it…

HexKrak · 2017-01-23T16:14:54.000Z

I’ve read about people using 100ms/s, but I’ve never needed to go that high. Try adding some z-hop?

HexKrak · 2017-01-23T16:57:17.000Z

Any way you could provide a clearer picture. It looks like there’s more going on here than stringing. Is the model fairly clean aside from the strings or is there a fair amount of deformation/globbing as well?

Rob_Brennan · 2017-01-23T17:11:17.000Z

The stringing is very thick near the base where they are closer together and form a wall. Nearer the top, they are a thick spider web that can be crushed. It appears to be fairly clean otherwise

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Rob_Brennan · 2017-01-23T17:12:37.000Z

Printed at 60 & 100 same effect. Pulled the extruded head apart and cleaned the nozzle with piano wire to make sure there is no blockage

Rob_Brennan · 2017-01-23T17:16:38.000Z

Though, just noticed that extruded feed is only feeding. I don’t see it reversing at all. That could be the problem. There is no retraction although it is indicated on the Cura screen. Now how to fix/ troubleshoot that?

Ahaber · 2017-01-23T17:30:51.000Z

I think that the problem may be that the arm on your extruder arm is cracked and therefore not feeding correctly. I had this problem with mine. Monoprice should have included an extra arm with the printer in the box. Also can you see / hear the motor spinning backwards when retraction is happening? Also try not to print at any speed above 60 mm/s because if you do your prints will not come out clean at all.

Ahaber · 2017-01-23T17:32:23.000Z

This print does not look good at all. You likely have more than just a retraction problem with your printer. What values do you have set for your nozzle width, extrusion multiplier and layer height?

HexKrak · 2017-01-23T17:40:22.000Z

Agreed. Make sure your filament diameter is set to 1.75, and flow rate is 100%. Might even want to turn down flow rate a hair.

Rob_Brennan · 2017-01-23T23:31:48.000Z

Turned out to be the software. The 2.3.1 did not appear to be sending the changes in the code. Monoprice had me download 15.04.06 and had me adjust a few settings and problem solved! Thank you all for your input. It got me on the right track.

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alstonr96 · 2017-01-24T00:28:10.000Z

Would you mind telling me how exactly you fixed it. I think mine is going down the same path

Rob_Brennan · 2017-01-24T01:30:08.000Z

Certainly, I downloaded CURA 15.04.06 replacing the other CURA then made these setting changes

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