PCB board and Bits /recommendations and suppliers

[HankMcSpank]

I 've seen this type of board from CPC wonder if anyone has used it ?

I'm unfeasibly tight (e.g. rather than move to a large house with a gravel drive, I simply glue rice krispies to my car tires) ....I would therefore never use my modest CNC machine to mill PCBs if I had to pay that for my copper board!

I use the paper based stuff (far nicer to work with...and whole lot cheaper)...

Low cost copper clad board ....100mm x 160mm is only 35p per board delivered (if buying 100pcs)

.....however, often it isn't perfectly flat, so I use double sided tape to attach the copper board onto sacrificial waste material (for this, I use nice flat acrylic sourced from a local industrial estate's skip!) to take out the worst of any bowing ...I then use CNC-USB CNC software to do the cutting. This software has a cool built in utility which probes the surface first and then takes account of probed peaks & troughs to adjust the Z height as it goes about it's isolation milling. I use 30 deg 0.2mm tip carbide V cutters from China...they're fine for my needs. (about a tenner for 10)...I can go as low as SOT23-6 (which is about 0.6mm between consecutive pads) ....I'd be able to go lower if my machine had ballscrews, but it just uses standard 1.5mm pitch threaded rod.....one day