Author Topic: jtech grbl source code?  (Read 452 times)

markus

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jtech grbl source code?
« on: October 10, 2016, 09:31:03 PM »
anyone know where i can get hold of the source code for the jtech grbl branch? (cant find it in github). The current grbl branch (9j) can do arcs and circles properly, so I want to see if i can merge the two.

The current grbl branch will not work with my ttl board, something about the wrong frequency - just incase you ask  :)

Lob0426

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Re: jtech grbl source code?
« Reply #1 on: October 10, 2016, 10:16:19 PM »
J-tech will not give it up.

There are several Laser grbl firmwares out there. Unfortunately they are all based on grbl 0.9g and earlier. That early and they have an "arc" bug that messes with BenCutLaser. T2Laser is ok with most of them, but J-tech is the best of the Laser versions. The new grbl 1.0/1.1 release has Laser Mode in it and it appears to work well. It just isn't out yet.

https://github.com/nickw89509/LaserInk

It is open sourced;
https://github.com/gnea/grbl/tree/dev

It has several different frequencies you can change to in cpu_map.h and default is .98KHz that is close to what J-tech is using for their PWM.

It is aimed at the Uno but will work with a change (16 to 14) of the block buffers on a Nano.
below in attachments;
grblUpload.ino.11bdevbuf14.hex already has the buffers changed no homing
grblUpload.ino.11bhoming.hex has buffers changed and homing for a single pin (D9) ready to be enabled.

You change $32=1 to enable "Laser Mode". $22=1 enables the homing.

These are Beta firmware!!!!

I hope this helps
Richard
A5 2.5W w/homing switches on L7
A5 2W diode self upgraded from stock 500mw

Experimenting with Mega2560 board upgrade

markus

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Re: jtech grbl source code?
« Reply #2 on: October 10, 2016, 11:27:44 PM »
J-tech will not give it up.

wow.

I thought grbl was open source, and jtech was just a branch. if j-tech is based on grbl and uses much of the code, aren't they breaking the rules by not releasing it?

thanks for the info, now i know where to look, will have to build and test the new version 😁. I was so disapponted yesterday when i engraved a nice grey scale photo and went to cut a circle around it, horrible waste of material and time :(

Zax

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Re: jtech grbl source code?
« Reply #3 on: October 11, 2016, 04:07:11 AM »
Yes they are, but that doesn't seem to matter.

T2Laser can combine raster and vector, it works around the bug so you don't get this issue.

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Re: jtech grbl source code?
« Reply #4 on: October 11, 2016, 08:12:24 AM »
@Markus,

You may or may not be aware that we have a group of four developers here on the forum that are busy developing updated firmware for three microprocessors to support our laser machines: the Nano, the Uno and the Mega2560.

They are the Cam-Tech NC team and they have their own Boards on this forum.

You may want to ask them if they are implementing any of the idea's that you are thinking about...just a thought...of course you may enjoy developing your own firmware too  :)

Tklus

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Re: jtech grbl source code?
« Reply #5 on: October 17, 2016, 04:42:43 PM »
Grbl 1.1 is beta released  ;D
It is working great on my laser router combo!

https://github.com/grbl/grbl/issues/1107


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Re: jtech grbl source code?
« Reply #6 on: October 17, 2016, 04:47:18 PM »
Welcome to the forum @Tklus...!!!