The Shapeoko Forum

This looks great, I feel a really dirty hack coming on! I'm currently driving the Inventables Quiet Cut spindle using the spindle PWM output from grbl, so that I can set spindle rpm from g-code. So, if I can take that PWM output and feed it into your Arduino PID as the set point, I could have proper...

Hi All, I'm using grbl with a V5 gshield and I want to implement a simple touch plate using grbls probing features. Buuuuttt... when I tried to access the A5 pin I found that it was pretty much inaccessible due to the X-axis screw terminals and wiring to the stepper completing covering that pin. Is ...

I've actually been using the Inventables hack and it seems to work ok. I can push it to 12,300 rpm before the power supply cuts out, but as you note, it could be the speed controller that it screwing up. I'm still tossing around ideas for measuring the rpm directly. One of the Arduino frequency coun...

Sometimes a guy just has to say DUH! What was I thinking? Ok I tried the proper commands and they seem to have no effect at all. The spindle just keeps running. Any more ideas? Thanks Smoky I think the M3, M2 etc commands only work on the special PWM build of GRBL 0.9G. I've done it as part of gett...

Hi All, I've just compiled grbl 0.9g with the pwm spindle speed control option enabled. I'm using the Inventables quiet cut spindle along with their speed controller. I set the following defines in config.h file. / Use by the variable spindle output only. These parameters set the maximum and minimum...

Hi All, I want to try out the new spindle speed control in the 0.9 release of grbl. So I re-compiled the source code and uploaded using the Arduino IDE (v1.5.8) over USB. One thing that has me mystified is that the previous configuration settings ($0, $1 etc.) were still retained. This was not the c...

Hi All, this is my first serious Shapeoko project, a kid's step, with decorative extras, just because I could. I designed it in Alibre Design based off one of the digital wood joints at: http://www.flexiblestream.org/project/50-digital-wood-joints , CNC tool paths done using CamBam. Milled using the...

Ooops, the page I linked to explains what all the grbl settings mean. The 0.9G grbl with SO2 defaults is actually at: http://bit.ly/1kOAzig

If you upload that to your grbl then enter $$ you will get the SO2 default settings.

ijv

Still having trouble with this. Where is the setting for microsteps / step? How do I find out if my motors are 200 or 400 steps / revolution? Or is this a setting needing to be made somewhere? When I try to run it no matter how far I tell it to run, it just seems to jerk once and stop. X, Y, or Z a...

As a side note, I've also been investigating implementing third-order S-curves, now that there will be both the processing power and flash space to install something like this. It turns out that this is absolutely NOT a trivial problem to create an optimal plan through a sequential set of motions w...