Wiring home made kit limit switches

CrossFire ® General Discussion
1

I’m trying to wire in my own limit switches I’ve made and installed all the hardware and gone through the install instructions from the kit.

They don’t seem to be work correctly, it will not home.

The only difference I see between the kit they sell and the kit I’ve made is the header connector that comes off the control board had 3 wires, yellow, green are limit switch wires going to l1 and l2 and there’s a red wire connected to the board that’s labeled gnd. But it terminates inside heat shrink and doesn’t come out the other end leaving only a green and yellow wire. My question is there something going on under that heat shrink I cannot see?

I did notice I’m getting 5v on both l1 and l2 pins. The only other connection to the board is to a 5v source. I figured the limit switches would pull the 5v down to ground but I’m my wiring I don’t have a ground.

And schematics or pin outs would help.

Thanks

2

IIRC, one wire is Y axis, one is X axis, the third is common. Which is which I don’t know.

With the cover off, the control box powered on, you can use a volt meter to check voltage at each pin, and with FireControl running, you can look on the screen to see which of the hot wires trips the axis icons at the bottom of the screen when you ground them out.

2 Likes
3

I moved the wire going to the 5v to the GND pin on the same limit pin header and it all works now? Don’t ask me how they do it but seems to be fine

4

I am willing to bet they used a transistor in that bundle with the grd and lim1 lim 2 as a way to isolate emf from the table. Pure speculation but if I had 5 minuets with a limit switch harness I could confirm. Thank you for posting the switching to grd from 5v that was the light bulb moment. Now i can finish the estop, lasers and home limit switch harness.