A brief tutorial on using the new Touch Plate widget inside ChiliPeppr to easily set your Z axis to zero for your tool and the work piece. Touch Plate on Ebay www.ebay.com/it...
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i used DSP controller. I set the z axis to use an automatic tool, but when it starts my machine, my router blade penetrates the table as deep as 3 cm. Why?
Thanks for the review and adding the feature to ChiliPepper. I've been thinking building my own for a while now, at 15.00, it's a steal. You should ask for a sales commission. *grin*
John, like someone else posted, my spindle would travel up instead of down but recycling the controller fixed it. My question is why mine is not allowing for the touch plate thickness even though it have entered it. once the tip touches it automatically sets the Axis to 0. If I click go to 0 it goes to the touch plate height instead of the work piece height. Any suggestions? Great video!!
I've seen this behavior on certain versions of TinyG firmware. One thing you can do is just move your spindle down by the height after the touch plate process and then zero out all your axes or just the z axis. So there is a workaround with 1 more step.
My version of chilipepper is a little different. It has set g54, go to g54, set machine 0 and go to machine 0. I'm new to cnc and this was a bit confusing. When the probe touches that sets machine 0. Remove the touch plate and click go to machine 0 and it's dead on. Which is exactly what you were saying. I was confused as to what was happening but I see it now. I'm now a subscriber!!
This widget is only inside the TinyG workspace right now. TinyG has a G38.2 command specific to probing like this that sends back well-formatted JSON when the probe touches so it was super easy to implement. Doing this inside Grbl is a different story. I do know that Jarret Luft, the maintainer of the Grbl workspace was looking into supporting this.
This is a cool add-on. I looked through the widget code, and it appears to use a G28.3 command to reset the z zero. Doesn't this reset the machine coordinates instead of a work coordinate system? Would it be possible to change it to a G10L2 command instead to set the work coordinate z zero?
Yes, I think a g28.3 is sort of cheating. Initially it was using a g92 but that was too fleeting and/or some folks have gcode that sets g92 in the run so g92 won't work. If you change it to a G10L2 you'd have to add a UI element asking the user which layer they want--g54 thru g59. I think most folks don't know what those are. So what's the best way?
John Lauer Perhaps it could just query the current WCS and assume that you're setting the Z offset for that coordinate system. So if you have G57 selected when you run the script, it automatically populates to G10L2P4Z... Does that sound reasonable?
Probably a silly question but, how does this connect to the CNC shield for it to acknowledge and feedback that a connection has been made? For example I have this shield forum.hobbycomponents.com/viewtopic.php?f=40&t=1747
After homing my machine for all three axis using limitswitches i start using the touchplate for the Z. Instead of down, the spindel travels up most of the times. Sometimes it travels down. Any idea why this is could happen? I have a 4030Z and use the same touchplate.
+Henny Poort After I homed my machine the "round pyramide" simulation of my spindle is also hovering underneath the Z-0-level in Chilipeppr. Could I have missed a setting somewhere?
