Very nice looking machines.
I've started with the idea of building a PCB mill with 10x16cm working area (Eagle light limitation, more than enough for 90% of my PCB's).
I've ended with a mill with 15x21cm working area, and 7cm of Z travel.
Working good until now: attached a sacrifice MDF, and leveled the working area.
- whole mechanical CNC
- nut-spring-nut used for Y axis
- controller + manual jog + bipolar drivers for steppers
(controller = CNCUSBController from Kroko)
- stepper drivers = A3979 based, and are working amazing from a 12V power supply
- RC outrunner used as spindle for milling PCB's (has 3.17mm inner bearing diameter ), well.. milling PCB’s needs only about 15W of power!!!
- 2x12V,2.5A power supply - one for controller and one for spindle
- I intend to put all electronics part on the back of machine
- a small PCB milled just for test (the one with larger isolation tracks was obtained by running the same g-code for about 15 times, just to see what will happen); note: there is no software compensation for backlash!
Merry Christmas to you all!
Looks great! Get those electronics organized and you're good to go
Looks great guess I will have to start on one here shortly. Love all these post with very positive results. I have a dremel and a sears 1/4" router and will use those as proto types. if all works good then I would start a search for the famous porter cable 1/2".
this is how I've started..
it was the first attempt to do a cnc.
alltrough it wasn't any real use, it helped me to understand all weak points of the design, and to find better solutions.
What are you using to control the spindle motor?
Seeing as he's using an RC Outrunner motor, I'd assume he's simply using an ESC, and feeding it a PWM signal from some source. I'm sure he'll let us know though
How do you know your speed on the out runner?