Feed Rate problems with GRBL + Piclaser

Mach3, grbl, ect.
Forum rules
Be Kind to other's.
No Cussing or Swearing.
Don't post anything Illegal or Obscene.
Image attachment size limit is 500 KiB.
comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Feed Rate problems with GRBL + Piclaser

Postby comeollas » Tue Jan 05, 2016 2:28 pm

Hi to all!

I buyed piclaser for make photo engraving and i have some problems with feed rate when i send Gcodes generated with Piclaser.

I set my CNC to 4000mm/min feed rate and when start a job make outline fast but when start with photo slow down drasticaly.

Whit my Nichia 2.5W Laser i need more speed or all parts of job it's dark and i need to put down laser potenci with max laser value to 100 :facepalm\

I use the last GRBL i think is 0.9J and now i use this config (i changed a lot of thing for try to improve speed):
Captura1.PNG
Captura1.PNG (21.07 KiB) Viewed 19922 times


In pixel resolution y use 0.16mm because with 0.18-0.254 the lines are to many separeted and my laser focus i think it's good and small focus point.

I use CNC Shield and use spindle pwm with S commands for control pwm.


Any idea for improve speed when print rasters?

Thanks to all for your help.

User avatar
Picengravertoo
Full Access Moderator
Posts: 1092
Joined: Thu Dec 18, 2014 4:02 pm
Contact:

Re: Feed Rate problems with GRBL + Piclaser

Postby Picengravertoo » Tue Jan 05, 2016 3:11 pm

Hi lluis,

Your feedrate issue is with grbl 9J. It will not execute the S commands in real time. It will dwell on every line there is a S command because it's intended for spindle speed, not laser control. You will need to flash the J-Tech PWM grbl 9G firmware to your UNO. You can find the download on this forum at the bottom of the main page.

Also grbl 9J does not have the setting $14=, but grbl 9G does, so make sure you set it to $14=1 after flashing the new firmware. There is no homing or arc support either because it was only intended for raster engraving images. The J-Tech grbl uses a range of S0-S255 for the laser power commands, so set PicLaser accordingly.

Thanks.
Jeff

comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Re: Feed Rate problems with GRBL + Piclaser

Postby comeollas » Tue Jan 05, 2016 4:51 pm

OMG, i spend a lot of hours with the laser...

Tnx!! i go to change the firmware and try it and :)

comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Re: Feed Rate problems with GRBL + Piclaser

Postby comeollas » Tue Jan 05, 2016 5:13 pm

I uploaded hex file from here, and i see in GRBL controller current firmware is J-Tech Photonics 0.9g but i have the same problem, when start picture go extremely slow.

I changed $14=1 only.

I need to do something for erase old configs of grbl?



Or another config need to change for make it work.

Thnx for your time Picengravertoo

User avatar
Picengravertoo
Full Access Moderator
Posts: 1092
Joined: Thu Dec 18, 2014 4:02 pm
Contact:

Re: Feed Rate problems with GRBL + Piclaser

Postby Picengravertoo » Tue Jan 05, 2016 6:11 pm

Ok, are you using a Genuine Arduino UNO, or a counterfeit/knockoff? Unless it's a Genuine UNO, it may not work properly.

Here is how you can tell.

https://www.arduino.cc/en/Products/Counterfeit

It should maintain your original grbl settings, but check them anyway.

comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Re: Feed Rate problems with GRBL + Piclaser

Postby comeollas » Tue Jan 05, 2016 6:48 pm

It's a duemilanove genuine arduino not uno.

The problem it's yesterday with Piclaser demo before but piclaser i tested it and works good with good speed when i make a photo.

And i changed to 0.9J and stop works, and now with j-tech grbl don't work too and i don't understand what option or reason affect with this change.

comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Re: Feed Rate problems with GRBL + Piclaser

Postby comeollas » Tue Jan 05, 2016 6:49 pm

It's normal when i flash to j-tech grbl the new grbl mantain the last settings? Because i flashed it and grbl options are the same.

User avatar
Picengravertoo
Full Access Moderator
Posts: 1092
Joined: Thu Dec 18, 2014 4:02 pm
Contact:

Re: Feed Rate problems with GRBL + Piclaser

Postby Picengravertoo » Tue Jan 05, 2016 7:08 pm

I just noticed a grbl setting that may be your problem. Try changing $10=18, then afterwards, change $11=.005 back again. You will see why.

comeollas
Posts: 12
Joined: Tue Jan 05, 2016 6:24 am

Re: Feed Rate problems with GRBL + Piclaser

Postby comeollas » Wed Jan 06, 2016 9:43 am

Now whith 10=18 and 11=0.005 the machine go in same speed extremely slower.

It's possible make a reset grbl for lose all old configs?

User avatar
Picengravertoo
Full Access Moderator
Posts: 1092
Joined: Thu Dec 18, 2014 4:02 pm
Contact:

Re: Feed Rate problems with GRBL + Piclaser

Postby Picengravertoo » Wed Jan 06, 2016 10:05 am

There is a reset button on your Arduino, but I'm not sure how to reset all the grbl settings. Flashing grbl 9g should not have changed them. What gcode streamer are you using? Some can not handle the increased performance of the grbl settings. Our PicSender can though. Or the problem is the Arduino Duemilanove itself. We never heard of anyone using one.


Return to “CNC Controller Discussions”

Who is online

Users browsing this forum: No registered users and 2 guests

cron