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dear, ? I don't want to send me e-mails from answears

Hi Jean-Claude. I *like* your vacuum table. Very ingenious. What are you using for a vacuum source? - Mark

That vacuum table is a great idea!

Hi Jean-Claude, yes, I'll send it this evening. you might need to change it to handle your format if it has any odd commands as some do.

Very good description Svetlo! thanks! -Lee

Hi Lee Interesting description. Would you be willing to send me your hpgl to gcode translator. I use a cheap German pcb program which can only export HPGL, Excellon and Gerber files. I do not use

Often I am milling 100 x 160mm PCBs as they are quite cheap here. To hold them I made a styrofoam vacuum plate and it is working fine. I have even used it for small aluminium parts with light Z-paths

Hi Svetlo. I think the size may be part of my problems. I have milled smaller boards (about 30mm x 60mm and other similar sizes) without any problems. I know what you mean. The larger board I an

Hi Lee. I settled on the rates I used as it minimized the tear-out on the traces. I haven't actually measured the thickness. The boards I'm using are also from eBay :-) I believe they are 1oz

Hi, I'm successfully milling PCBs on my cnc. The cnc is custom made but it is a small one with aluminum profiles frame and not very stiff. I haven't milled PCBs this big. My biggest is around 50mm x

I didn't really pay much attention to actual depth( and the maths ;-) other than making sure the bit cuts through the copper fully. My min trace width setting in the sw(altium) was 15mils. I use an

Lee, your boards look good. I'm using similar "V bits. As far as I can tell there not any play in the motor mounts or lead screws. But I can't be certain without actually bring out some of my

here's the proto w/ wider traces

I had my min traces width set too low in this run, the later one was better, but I didn't have a pic handy.

Yes, it does look like it was skating up or something loose in the mechanics. Should look alot nicer than that. I settled on using bits like these:

Great minds must think alike :-) I ran a number of test patterns to test the depth of the cut as well as minimal trace separation for a specific type of cutting / milling bit. I've gotten reasonably

I'm creating the basic schematic & PCB layout with Kicad. From there, I use pcb2gcode to translate the Gerber files to gcode. I'm using OpenCNCPilot to do the auto leveling and drive the

Hi Lee. I've attached one example. This was done with the 0.7mm end mill. At the moment, general THT and .1" stuff. Nothing fancy. - Mark

Hi James In order to reduce the hair traces put a polaroid filter in front of the laser. By turning it left/right it does minimize the thickness of the lines. When I was using a laser cross beam for

I do still use the mill to drill the through holes from a drill file.