A result that I cannot understand

Author	Message
OA47 Guru Joined: 11/04/2012 Location: Australia Posts: 1016	Posted: 10:09pm 14 Jun 2024       Thanks BigMik for your input.   Quote   I don’t know what CNC you use is but that is about 1/3 of what most cheap CNCs quote for their accuracy. The CNC is a 30 X 40 unit I have built myself.   Quote   That aside, I am thinking that the bed may not be entirely flat, I would suggest that you clamp a sacrificial block to the table and mill it flat and secure your PCB to it. I don't think that the bed levelling is the problem as I have milled it and ran the gauge over it and it seems to be better than 0.02 mm overall. As described the issue is that the same certain pads are affected in different areas of the milled areas. I have found a work around for the moment using a Dremel soft polishing bit but the tools wear quickly so I will be hunting for a better solution. 0A47