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[solved] Approach to first printed path is wicked slow

imitation

[solved] Approach to first printed path is wicked slow
September 23, 2011 06:06PM

Registered: 15 years ago
Posts: 36

Hi everyone,

as i'm getting my Sells and Skeinforge dialed in and solid, there's one more bug (?) that i haven't squashed. The gcode Skeinforge generates looks like this:

...start.gcode

G90
G21
M103
M105
M106
M140 S122.0
M141 S30.0
M142 S0.0
M113 S1.0
M108 S38.0
M104 S237.0
M108 S13.68

and then this:

G1 X36.33 Y85.1 Z0.2 F60.0

F60 is way too slow, it can take around two minutes for the head to travel to the start position. Normally i travel at F18000 and the print always rolls down just fine and with the right speed.

Ideas?

Thanks,
-imitation-

Edited 1 time(s). Last edit at 09/24/2011 04:39AM by imitation.

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ahmetcemturan

Re: Approach to first printed path is wicked slow
September 24, 2011 01:30AM

Registered: 15 years ago
Posts: 202

If your firmware supports a maximum z feedrate, set it to something your z axis can handle.
Then disable the limit plugin in skeinforge or sfact.

[github.com]

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rhmorrison

Re: Approach to first printed path is wicked slow
September 24, 2011 03:43AM

Registered: 16 years ago
Posts: 3,742

In Carve - Limit Set your Maximum Initial Feed Rate to your normal speed.

Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

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imitation

Re: Approach to first printed path is wicked slow
September 24, 2011 04:39AM

Registered: 15 years ago
Posts: 36

Thank you all!
Disabling Limit did the trick:

G1 X69.62 Y92.45 Z0.2 F751100.3928

Sprinter is set up for my maximum X/Y/Z/E Speeds, so this should work.

Thanks again!
-imitation-

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ahmetcemturan

Re: [solved] Approach to first printed path is wicked slow
September 24, 2011 01:08PM

Registered: 15 years ago
Posts: 202

Nice, not sure that you will get good prints at 12000mm/s winking smiley

Anyway you shouldnt let fw handle all speed control. That will mess up duration based calcs in skeinforge..
Always use reasonable values.

[github.com]

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imitation

Re: [solved] Approach to first printed path is wicked slow
September 24, 2011 04:14PM

Registered: 15 years ago
Posts: 36

Of course, i'm setting the general traveling and printing speeds in "Speed" (70mm/s btw), the fw limits only kick in with manual G0 moves or that one approach move.
Limit only offers me two options - "Initial Feed" and "Z Feed". I don't think disabling initial feed will mess up anything, and z feed shouldn't make much of a difference time-wise either since z moves are always less than a fraction than a second.

Edited 1 time(s). Last edit at 09/25/2011 04:25AM by imitation.