im starting a laser build for my son and we are starting out with a keys cnc shield 3 axis with Arduino nano and grbl, 1 what pins on the shield do we hook up the laser 2 do we have to do anything else 3 change setting in grbl to set off laser is mthe only thing I think we need to change thanks in advance Robert
Contact the supplier of the board for documentation or advice? or trace pinout from Grbl pinout? gnea/grbl Or replace it with a BlackBox (OpenBuilds® Documentation) with decent documentation (refer to https://docs.openbuilds.com/blackbox/#332-laser12v.html or https://docs.openbuilds.com/blackbox/#333-laser24v.html depending on whether the laser is 12v or 24v)
Docs don't seem hard to find? Ks0152 keyestudio CNC Shield V4 - Keyestudio Wiki / Ks0096 keyestudio CNC Kit / CNC Shield V4.0 + Nano 3.0+3pcs a4988 Driver / GRBL Compatible - Keyestudio Wiki They seem sufficient to get started, but it doesn't look like the sort of thing you'll get much support with. Those boards typically don't include reverse polarity, hot-plugging, or short circuit protection either, so stock up on spares of both the drivers and the Nano, because there's a very high chance you'll fry a couple of each. Those drivers are ok for a laser build, but I would strongly recommend, performance-wise, moving to 24V (assuming NEMA 17 motors) through proper stepper drivers like these: https://smile.amazon.com/STEPPERONLINE-1-0-4-2A-20-50VDC-Micro-step-Resolutions/dp/B06Y5VPSFN - this is the route I took, I originally tried using an Uno and V3 shield, but it's a recipe for frustration. There's really no need any more, it's not 2015! You can get rapids up to 15,000mm/min with this setup quite comfortably. ...Or, as Peter says, buy a BlackBox which has the downside of everything being integrated together, but the significant upside of 80% of the wiring work already being done for you.
