GQRP talk last year at Telford ARS
Tuesday, 19 June 2018
That's more like it...
Adjudication report for M1K : NFD 02/06/18
No Errors found in your log
No Reverse Errors found QSO Error rate = 0.0%
Average Error Rate for this contest = 1.94%
Ended up near the bottom though as operated fixed as moved from /P location while setting up :-(
Got the base (old kitchen unit shelf) and the frame fixed in place, got the sides one and the top will make it 1/3 close 2/3rds on a piano hinge. It doesn't have lots of room inside but doesn't really need to. I have this sound foam I will add to the sides. But I really just wanted to reduce the noise and contain the dust.
I'll add a perspex door to the front, I have a sheet (Ex.G3ZAY tnx), but it is a bit thin to self support so might make a wooden frame for it. I suspect a couple of carry handles to the base. The CNC will have a couple of rubber plates added so it is less prone to cause vibration.
Got the emergency stop switch (ebay for pennies), I will put that inline with the power cord (probably in a little box on the base) activating it will kill all power immediately, will add lights and a fan, maybe a camera too! Door interlock?
A 12V car vaccum will probably sit on top (rear) or side with the flexible hose going inside to the table for the swarf etc it will create. I might 3D print a hose holder and nozzle. The PCB is bare right now,, no cover, I might leave it like that but might be prudent to cover it too.
ALL the sides can be taken off as are held in place with four 6x3.4" screws as can the frame, so if need to get to stuff I can.
In two minds if I paint it at all.
The CNC doesn't have any limit switches but it could and the PCB does support them so will be looking at if need those. I have checked and if the CNC goes off the end of one direction X,Y or Z the motors turn but don't jam, not sure if that is a good thing or not.
I expect I could RAMPS/Arduino CNC shield convert this at some point in the future but for now it will be USB cable driven. GRBL control so either something bespoke or I like Chillipepr.
I suspect one item I'll need to add will be a jig for double sided milling.
Saturday, 16 June 2018
Got plenty of plywood for the sides, base will be a bit thicker.
Working out adding a small LED strip, vaccum hose and emergency on/off switch. Front will eventually have a door.
Not the quietest of machines when milling pcb.
The spindle is c80W so that looks like the weak point, got a few ideas for alternatives. Might not be controllable off the PCB though.
Yes will be milling PCB with it. Max size about 250mm x 180mm