build.md

Parts list

• Just Add Board - https://shop.justaddsharks.co.uk/collections/featured/products/open-source-break-in-board

• Leetro PAD03-E & Cable - Ordered from Just Add Sharks on request

• Raspberry Pi 3

• RS232 header for Raspberry Pi - https://www.tindie.com/products/DTronixs/raspberry-piio-minipiio-rs232-add-on-board/

N.B. you'll need to get a gender changer to connect the display to the serial module as both are DB9 male.

I'd suggest the following part from CPC:

• http://cpc.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?partNumber=CS20409

I didn't know this in advance so ended up making a gender changer up using parts from the junk box. That was annoying but also kinda useful as it let me build a DB9 to DB9 adapter that I could insert power into for developing on a standard serial port rather than just on the Pi RS232 board with the power hack.

• Arduino Uno

• GRBL v3 CNC shield

• Self adhesive PCB mounts - http://cpc.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?partNumber=PC01959

References

Hardware

• https://grahamwideman.wikispaces.com/Laser+cutter+--+Leetro+controller
• https://wiki.london.hackspace.org.uk/view/Project:RELaserSoftware
• http://www.leetro.com/down/MPC6515%20%20Manual.pdf
• http://www.jwtech.co.th/downloadjwtech/easyview/easyviewmanual/eb8000Manual.pdf

Modbus

• https://pymodbus.readthedocs.io/en/latest/
• http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
• http://libmodbus.org/documentation/