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Re: LIN_ADVANCE = better extrusion control

Posted: Tue Jan 08, 2019 8:28 pm
by jvingaard
What is the latest firmware w/bltouch from ABH?

Re: LIN_ADVANCE = better extrusion control

Posted: Wed Jan 09, 2019 1:57 am
by JohnSays
mb300sd wrote:FYI, 1.1.9ABH also has Junction Deviation enabled, which replaces the old Jerk settings. The default is 0.02. Try 0.05, and WOW I can print fast. Set with M205 J0.05. Adjust it during the middle of a print to really see the difference. (SSH in, "echo M205 J0.05 > /dev/ttyACM0")

Edit:
0.08, not noticing any difference in surface finish, but my whole machine vibrates the way it used to on 1.1.6, and layer times cut to 1/3.


I've tried this and have not yet seen any difference. Is there a switch to set in the code first and then recompile?

Re: LIN_ADVANCE = better extrusion control

Posted: Wed Jan 09, 2019 7:31 pm
by mb300sd
JohnSays wrote:
mb300sd wrote:FYI, 1.1.9ABH also has Junction Deviation enabled, which replaces the old Jerk settings. The default is 0.02. Try 0.05, and WOW I can print fast. Set with M205 J0.05. Adjust it during the middle of a print to really see the difference. (SSH in, "echo M205 J0.05 > /dev/ttyACM0")

Edit:
0.08, not noticing any difference in surface finish, but my whole machine vibrates the way it used to on 1.1.6, and layer times cut to 1/3.


I've tried this and have not yet seen any difference. Is there a switch to set in the code first and then recompile?


You should be able to change it in one of the configuration headers. Search for 0.02

The SSH method definitely works though, might depend in your other settings how much it effects print speed. You can send any gcode you want using SSH, even during a print. I've found it really useful for adjusting things that the touchscreen can't.

Re: LIN_ADVANCE = better extrusion control

Posted: Wed Jan 09, 2019 7:50 pm
by JohnSays
mb300sd wrote:
JohnSays wrote:
mb300sd wrote:You should be able to change it in one of the configuration headers. Search for 0.02

The SSH method definitely works though, might depend in your other settings how much it effects print speed. You can send any gcode you want using SSH, even during a print. I've found it really useful for adjusting things that the touchscreen can't.


Thanks for the response.

Are you saying that I should change the setting in the config file and not to use the M205 J0.05 in the initialization code? I can do that if needed.

I have never tried to SSH in. My printer is on 192.168.0.19. What commands would I use to send and receive data? Better yet, is there a thread on doing this?

Re: LIN_ADVANCE = better extrusion control

Posted: Wed Jan 09, 2019 10:10 pm
by mb300sd
JohnSays wrote:
mb300sd wrote:
JohnSays wrote:


Thanks for the response.

Are you saying that I should change the setting in the config file and not to use the M205 J0.05 in the initialization code? I can do that if needed.

I have never tried to SSH in. My printer is on 192.168.0.19. What commands would I use to send and receive data? Better yet, is there a thread on doing this?


Initialization code should work fine.

You can't receive anything, since the touchscreen app takes control of the serial port, but linux allows another app to write to it.

echo GCODE_HERE > /dev/ttyACM0

Re: LIN_ADVANCE = better extrusion control

Posted: Wed Jan 09, 2019 10:59 pm
by JohnSays
Thanks!

Re: LIN_ADVANCE = better extrusion control

Posted: Fri Jan 11, 2019 6:04 am
by jvingaard
i am using 1.1.8ABH firmware. do i need to enable FRS in the firmware, for it to work?