Retraction from prime tower to part

[willryan3 4]

I have been getting some "zits" on the outside corner of my print (side facing the prime tower) and was wondering if I need to up my retraction settings or if there are some other settings that would help. I am currently printing using PET+CF with settings of 7.5mm distance, 30mm/s speed. Please let me know!

Thanks, Will

[Framar 38]

Hello there, 

 

2 things I have in mind. First you would have to carefully observe if the material is oozing when the print head is moving from the prime tower to the print. If so, you can increase retraction distance and speed and/or decrease print temperature. Since I have no experience with CF material I can't tell if your settings are right or not.

 

Secondly, why just print without the prime tower?

 

Good luck!

[willryan3 4]

53 minutes ago, Framar said:

Hello there, 

 

2 things I have in mind. First you would have to carefully observe if the material is oozing when the print head is moving from the prime tower to the print. If so, you can increase retraction distance and speed and/or decrease print temperature. Since I have no experience with CF material I can't tell if your settings are right or not.

 

Secondly, why just print without the prime tower?

 

Good luck!

Upping my retraction settings now. As far as the prime tower I was using it to prevent these strings but if I get my retraction down does that eliminate the need for the prime tower?

[Framar 38]

Well, I don't know. I always print my dual material prints without prime tower...

[willryan3 4]

Just now, Framar said:

Well, I don't know. I always print my dual material prints without prime tower...

Will try with and without. Keep you posted

[tinkergnome 927]

In addition I would place the tower closer to the printed object to avoid such long travel moves in between.

[willryan3 4]

1 hour ago, tinkergnome said:

In addition I would place the tower closer to the printed object to avoid such long travel moves in between.

Good idea, I did not know you could do that. Thanks!

[DarRAven 4]

You can enable coasting in cura it will stop extruding slightly before wall ends that will cause that extra filament to stay inside the walls. Also if you are using a custom printer or a marlin/repetier based printer try to calibrate the extruders step/mm setting (google) It is easy to do because some cheap printers dont give attention to these calibrations

Edited May 2, 2020 by DarRAven
typo

[willryan3 4]

On 5/2/2020 at 11:53 AM, DarRAven said:

You can enable coasting in cura it will stop extruding slightly before wall ends that will cause that extra filament to stay inside the walls. Also if you are using a custom printer or a marlin/repetier based printer try to calibrate the extruders step/mm setting (google) It is easy to do because some cheap printers dont give attention to these calibrations

Sounds great. I will give that a try.

Thanks

[willryan3 4]

Thank you all those who helped! After using coasting, moving tower closer and a few other tweaks the part turned out great. Appreciate it,

Will