e stop and spindle (on/off)

[Zygoat]

i am building a new router cnc machine (3 axis to start 4th coming). check it out here.

http://www.cnczone.com/forums/showthread.php?t=99824

now, i am wondering what i need to wire up the e stop, as well as control the spindle (router) for on/off operation. (i would like to get into speed control as well, but i have not been able to find any clear info on it so far)

i am also trying to figure out what i need in terms of protection. ie circuit breakers, relays ect.

i have driver boards. (im 804) they are optio isolated. i am looking at an antek power supply


any info would be great.

[vlmarshall]

I don't know about your driver boards, but the Geckos I'm using have a Disable pin, which I've set up to the Amplifier Enable output from EMC.

EMC also accepts a signal on any of the input pins, wire one to ground through a normally-closed pushbutton switch, select it in Stepconfig as an e-stop input, and check the Invert box, so the LACK of signal (depressed button or broken wire) triggers an e-stop.

According to the EMC integrator manual, remote-triggered E-stops like that will still require a press of the keyboard E-stop to reset.


Just this weekend I was able to setup the speed controller card from CNC4PC. Now, using my Sherline spindle motor and controller card (a KBLC card, like so many people use) I have speed selection and on/off control.
The speed controller from CNC4PC is the "C6" card, and REQUIRES a separate 12volt power supply, and a breakout board with buffered outputs.

A year ago I tried using the C6 on my Xylotex-driven mill, ignored the bit about using as isolated power supply, and burned up both the C6 and my mill's motor controller card. I was able to tune the system to within 10 rpm of commanded speed, anywhere from 50 to 3000 rpm... which should prove handy on a lathe.

[Zygoat]

the pin outs for the im804.

1. No Connection
2. Step Clock
3. Direction
4. Opto Supply
5. Enable
6. Reset
7. Fault
8. On Full Step


so looking at pin 5. i would think that the same wire that would go to emc2, should also connect here. then if i hit the e stop or there was an electrical problem, it would disable the drives.

what else should i be looking at as far as circuit breakers or relays?

thanks for the help.

[vlmarshall]

I'd hook pin 5 to an output pin from EMC, so hitting the keyboard Estop or Power keys would also disable the drives, and use the Estop switch either as an input to EMC, or to let a relay fall closed and power-down the drives and spindle with one side, and signal EMC with the other.

Circuit breakers are only good on the AC side of your power supplies, as switching off the DC or motors while the drives are powered is strongly cautioned against in all of the instruction sheets I've seen. I bet your power supply is already fuse-protected.