It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Unless I am configuring it incorrectly, it appears that Slic3r does not actually emit gcode to slow down the printing of the first layer?
I'm finding that I have to manually slow down the print speed using the 'Tune' command on the user interface to get the first layer to stick reliably when printing Hatchbox PTEG.
Under 'Print Settings', I configured 'Modifiers, First layer speed' to 50%. Yet, when I export the gcode to the SD card, and then attempt to print the file, it starts out printing at whatever print speed the last job used? I would have expected Slic3r to emit gcode to change the print speed as a result of my setting the 'First layer speed to 50%'?
Thank you,
Chris Shaker
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
By chance after setting the speed are you reslicing the print? Havent had it not use the settings. Using current version, etc?
Yeah, its that guy... 3D Nexus
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Running the latest Prusa Slic3r from driver version 1.7.5: version 1.31.6-prusa3d-win64. I just loaded a part into Slic3r, and output the gcode for you
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
I'm expecting the 'speed' to update in the display while the printer is laying down the first layer, and then expecting it to update again after that. Is that not what should happen?
What kind of gcode command should I be looking for? I don't see any M220. Is it just Feedrate changes, like F<number>?
Thank you,
Chris Shaker
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Try the colorprint printer profile. I haven't had to use z-hop yet after a ton of prints. I changed the speed a few times on the first layer and it had no problem doing so. Only difference here is I also used the 0.20 normal, since the time difference between that and the 0.35 Fast wouldnt be that much on such a small part.
Yeah, its that guy... 3D Nexus
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Thank you. I will play with other printer profiles.
Chris Shaker
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Started that print 3 times with extreme first layer changes, and it worked each time. 20%, 40% and 80%.
Yeah, its that guy... 3D Nexus
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
I just compared the gcode from that first test (first layer speed set to 50%), and the gcode with the first layer speed set to 70%. It looks like the speed differences between the two files are in the Feedrate commands: F1500 vs F2100?
So, the 'speed' in the LCD display will NOT update to match the print speed that I configured for the first layer?
Chris
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
It's my understanding the speed on the LCD is merely showing absolute printer speed- in other words, youre speed settings at 100% shown on the LCD is just the printer's overall speed unmodified by manual tuning- it doesnt reflect gcode changes.
Yeah, its that guy... 3D Nexus
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Yes, the printer is printing at 100% for the whole print. The printer setting overrides the speed settings in the GCode file, and is not necessary.
The slicer produces GCode which prints the first layer at 50% of the set speeds; the printer is printing at 100% of 50% (or 50%) for the first layer.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: It appears that Slic3r does not emit gcode to slow down the first layer of a print?
Thank you AncientWolf and Peter. Thank you for your help and information. I think I've got it now. This is my first time reading Gcode.
Really having fun cranking out parts with the Prusa.
Chris