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Kossel Delta xxl build project HELP

Posted by alex773 
Re: Kossel Delta xxl build project HELP
July 21, 2020 02:34PM
I start this print with 3.5 retraction Length under Filament Settings in PrusaSlicer and S3.5 in M207 in config.g
After 25 mm I send the M207 S4 F2300 Z0 to the printer and I changed the temperature to 190c. Maybe is just me but I don't see any difference.
I also checked that exposed section of the gear on the side of the Hemera and when it retracts it jumping back

Edited 3 time(s). Last edit at 07/21/2020 03:06PM by alex773.
Attachments:
open | download - IMG_20200721_133231.jpg (181.9 KB)
Re: Kossel Delta xxl build project HELP
July 21, 2020 03:10PM
I don't really see much difference either. Could you post that gcode file?


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Re: Kossel Delta xxl build project HELP
July 21, 2020 03:16PM
Re: Kossel Delta xxl build project HELP
July 21, 2020 04:20PM
Would you post the stl also, I'd like to slice it and see how it does the gcode for me.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 04:23PM
This is the STL
I just changed the Z to 50mm

Edited 1 time(s). Last edit at 07/21/2020 04:24PM by alex773.
Attachments:
open | download - stringing_test_with_bridge.stl (69.6 KB)
Re: Kossel Delta xxl build project HELP
July 21, 2020 04:30PM
Yeah, something's going on at layer change or retract time. Here's a snip of gcode from yours.

G1 Z4.500 F5400.000
G10 ; retract
G1 Z5.200
G1 X6.789 Y-44.591
G1 Z4.500
G11 ; unretract

It's moving to the next layer, retracting, then moving up by 0.7mm, moving to XY position, then going back down. Then unretracting.

Take a look at mine

G1 Z4.600 F5400.000
G10 ; retract
G1 X7.551 Y-0.057
G11 ; unretract

Looks to be consistent each time. There's got to something somewhere in your slicer config.
Take a look at the Printer Settings Tab in the Custom G-Code section, in the Before and After layer change.

Edit: Looks like it might actually be on the Printer Settings tab, in the Extruder 1 section under Retraction Settings. Probably the Z lift there, take that out. If you need it, you can add it to your M207. I've never used it ever.

Edited 2 time(s). Last edit at 07/21/2020 04:38PM by blt3dp.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 04:38PM
This is what I have in Custom G-Code

Edited 1 time(s). Last edit at 07/21/2020 04:39PM by alex773.
Attachments:
open | download - Screenshot (30).png (105.3 KB)
Re: Kossel Delta xxl build project HELP
July 21, 2020 04:39PM
Yeah, I did some playing around and looks like it might actually be on the Printer Settings tab, in the Extruder 1 section under Retraction Settings. Probably the Z lift there, take that out.



Edited 1 time(s). Last edit at 07/21/2020 04:40PM by blt3dp.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 04:44PM
Also in your start gcode, you can replace that G0 Z0.200 F1800 with G0 Z[first_layer_height] F1800
Prusa can do some variables, then it will go to whatever the first later height that you set in the gui.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 04:49PM
On Lift Z I have now 0. I have on Minimum travel after retraction 1. Should I change it to 2 ?
Re: Kossel Delta xxl build project HELP
July 21, 2020 04:51PM
I would. Though it shouldn't affect your issue. It's only to say if the travel is this short, don't retract.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 04:55PM
I changed it to G0 Z0.3 F1800
Re: Kossel Delta xxl build project HELP
July 21, 2020 04:57PM
That works, though you can actually type in [first_layer_height] and Slicer will put in whatever the first layer height you set in the gui. Is useful if you change the first layer height, you don't have to remember to change the start gcode.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 05:23PM
This is the first print with the new settings. Retraction Length 4.2 in PrusaSlicer.
Config.g Retraction : M207 S4.2 F2300 Z0.00

Edited 1 time(s). Last edit at 07/21/2020 05:31PM by alex773.
Attachments:
open | download - IMG_20200721_161942.jpg (182.8 KB)
Re: Kossel Delta xxl build project HELP
July 21, 2020 06:13PM
Looks a lot better. I believe we're looking at a cooling issue with the remaining stringeys and the bridge quality there. I've never actually printed a bridge yet on my printer, mine might come out the same. I'll print this file and let you know how it goes.

You may actually slow down the bridge speed, so the fan has time to cool it mid air.


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Re: Kossel Delta xxl build project HELP
July 21, 2020 07:36PM
30mm hight and 15mm/s speed for bridge
Attachments:
open | download - IMG_20200721_183448.jpg (187.2 KB)
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