Sherline 2000 CNC - Part 2 Sherline Pages Home : << Part 1 : Part 3 >> I replaced the z-axis with a 3A version of the driver board. It's still driven by the same 24V 1A supply. Eventually, I'll put a higher voltage/amperage supply on that axis. Also I added an "enable" switch to the board. Pushing it back turns off the z-motor. Handy for doing a test run without the end mill going down into the workpiece. The more significant change is that I made another interface board. I know, it looks similar to the old one, but the control lines that go to the driver board enable inputs are different. The three axii are enabled/disabled independently via the control port bits C1, C2, and C3. I modified Stepster to enable only the drivers that are necessary for the specified line of g-code. It makes an incredible difference in keeping the motors cool! 12-2-2001 Another day, another breakout board! I started using EMC, and EMC uses yet another pinout. I have to dive into the EMC source code and see how to add automatic axis enable to it. But that has to wait until I get a computer to dedicate to Linux/EMC.
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