Device Overview

We currently have on loan a shapeoko 2 from Simon
It appears to be using an Arduino uno with a gShield, with the grbl firmware and Nema 17’s

Firmware Overview

Currently the Shapeoko2 uses an Arduino Uno with a G-Shield connected to 4 Nema 17 Stepper motors

• https://www.inventables.com/technologies/gshield
• https://github.com/grbl/grbl
• http://www.shapeoko.com/wiki/index.php/Grbl_Configuration
• https://github.com/grbl/grbl/wiki/Configuring-Grbl-v0.8#grbls-xval-settings-and-what-they-mean

The original version of the firmware was 0.8c which ran at a baud of 9600
This has now been updated to version 0.9j which now uses a baud of 115200

Power Supplies

There are 2 PSU’s in use

• The first one (the black power brick) powers the fan and Arduino / shield / stepper motors
• The second one (the silver one in the enclosure) powers the spindle and can be turned on / off using the switch on the back of the box.

Spindle

The spindle is a spare one Bob had lying around

• http://www.ebay.co.uk/itm/300W-DC-12-48-CNC-Carving-Milling-Spindle-Motor-24V-36V-For-Engraving-Carving-/131775304417?hash=item1eae6b92e1:g:BtQAAOSwSzdXB3vC
• 12V - 48V / 300W

Spindle PSU

This was originally a PSU used for the laser cutter but which is spare

• https://endless-sphere.com/forums/viewtopic.php?f=2&t=55658
• https://endless-sphere.com/w/index.php/S-350-36

Calibration

So far everything seems to be in check. I’ve set the stepper current so that the stepper motors don’t get too hot, also the pulley on the X Axis should now be set correctly

• Currently there are no end stops, ideally we want an inductive sensor on Z-Min for milling PCB’s
• is there any additional steps we could pull from here: http://www.shapeoko.com/wiki/index.php/Calibration_and_Squaring_the_Machine

Tool Heads

For the collets we have ER11 collets located within the cream box next to the lathe
For milling bits, we have some next to the proxon mill we can use