JFettig
Posts: 72
Joined: Tue Dec 30, 2014 3:13 pm

Re: Wipe While Retracting...

Fri Feb 13, 2015 9:13 am

TenKOhms wrote:
JFettig wrote:I'm surprised this thread is so old and they haven't done anything about it!

Any tips on how to run that ruby script? I've installed NP++ and Ruby, definitely not much of a programmer.
instructions are in the comments at the top of the script:

Code: Select all

#filepath = "/home/user/whatever.gcode"
 
#chmod +x this file
# ./thisfile.rb "/file/path.here" > "/new/file.path"
might as well be greek :P

MaOb
Posts: 2
Joined: Thu Feb 19, 2015 11:42 am

Re: Wipe While Retracting...

Thu Feb 19, 2015 11:45 am

Hi,

is it possible that this issue has been fixed in s3d 2.2.2?

BR, Martin

JFettig
Posts: 72
Joined: Tue Dec 30, 2014 3:13 pm

Re: Wipe While Retracting...

Fri Feb 20, 2015 9:04 am

It still pauses, blobs, then wipes.

JoeJ
Posts: 1436
Joined: Sun Feb 16, 2014 10:52 am

Re: Wipe While Retracting...

Fri Feb 20, 2015 10:59 am

Just to be clear, what is currently does is print, retract immediately after completing the loop, and then wipe. There is no pause. It is a retraction movement.

It seems like some people may have their retract speeds too low if this is actually a long pause. Retracts are typically very quick.

JFettig
Posts: 72
Joined: Tue Dec 30, 2014 3:13 pm

Re: Wipe While Retracting...

Fri Feb 20, 2015 11:01 am

100mm/s too slow? There is a pause while it retracts, a long Bowden tube has a ton of compression on the filament, and it blobs. Direct drive and it wouldn't have an issue because retractions could be really short. I have to retract 6 mm or it strings.

JoeJ
Posts: 1436
Joined: Sun Feb 16, 2014 10:52 am

Re: Wipe While Retracting...

Fri Feb 20, 2015 6:45 pm

Why don't you try some coasting to help relieve the built up pressure then? A 6mm retract at 100mm/s would only take 0.06 seconds.

JFettig
Posts: 72
Joined: Tue Dec 30, 2014 3:13 pm

Re: Wipe While Retracting...

Sat Feb 21, 2015 10:08 am

I do coast, it makes a seam and is inconsistent if I turn it up. That retract definitely takes more than .06 seconds by the time motion stops, the filament accelerates and decelerates - it probably doesn't even make it to 100mm/s in that short distance.

bot
Posts: 38
Joined: Mon Feb 16, 2015 6:46 pm

Re: Wipe While Retracting...

Sun Feb 22, 2015 4:00 pm

It takes longer because of acceleration settings. Often the extruder stepper axis has very conservative acceleration and jerk firmware settings. It likely never even makes it to 100mm/s if it's taking so long.

madeinoz
Posts: 29
Joined: Sun Feb 16, 2014 10:01 pm

Re: Wipe While Retracting...

Sat Mar 14, 2015 11:05 am

+1

I've just come across this problem printing nylon on a bowden extruder and is can see a noticeable pause at the retractions which are causing blobs

illbeback2
Posts: 5
Joined: Mon Mar 16, 2015 7:32 am

Re: Wipe While Retracting...

Fri Mar 20, 2015 4:53 pm

+1

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