Machine: SmartDIY Fabool CO2 Laser - open source framework
Board: _custom PCB based on GRBL, uses STM32F205 IC as main CPU, output is controlled by STM32, laser power is adjusted by PWM - see details @ https://hackaday.io/project/161666-open-source-co2-laser-cutter
Firmware: stock board is GRBL-based “I have a new board and I’m using whatever it came with” is also a great answer!
Problem/ Question: Please provide a detailed description and pictures of your machine/ board/ wiring.
I’ve wired stock/pre-existing connections as followed my new cohesion3d board:
-limit/stops - connected the 4 existing end-stop JST ends (two-wire only) to signal + ground pins on C3D board
-laser power - stock 3-wire JST (wire colors: white, black, red) - connected white to laser signal & black to laser ground on C3D PCB - any ideas where/how to wire the red laser power wire? currently there’s a magnetic door open/closed safety setup.
-stepper motors - 4-wire (technically six pins within stepper motors) - using multimeter checked for resistance to identity the pair of wires to separate winding (2) and initially just inserted the wire JST female plug to C3D board male pins labeled for X-axis, hoping they match the “B2-B1-A1-A2” orientation noted in a PCB diagram found in this forum. In testing just this initial part of my hardware/wiring process for correct connection every configuration, change in wiring config for just this connection either results in the motor making noise, small jerks on x-axis but seemingly stuck with opposing forces.
This result was recreated in my connecting of the two stepper motors on the y-axis. For y-axis i shifted the top to “MAP” jumpers to the left to mirror y-axis output to a-axis output (per blog article cited below).
I can provide more pictures as well as documentation from the original PCB wiring info specific to this setup. a blog post I used for helpful tips that documents the upgrade of this machine with a cohesion3d board was: https://www.sodesne.com/blog/2019/6/23/smartdiys-ds-laser-build-and-upgrade
any ideas about resolving the stepper motor lock-out issue?
thank you all