[Emc-users] estop switch question

[Sebastian K. <se...@hi...>]

I'm reviving an old band saw that someone donated to our hackspace.  It 
looks a bit like this one, but way older and junkier, and without the girl:

http://www.oceanmachinery.com/images/kmt-band-saw.jpg

It has an automatic shut-off switch that triggers when the saw has cut 
all the way through the workpiece, like a bottom limit switch -- it just 
opens the circuit that powers the motor.

It used to have a toggle switch on the front that would let you turn the 
motor on (if the saw was up off the bottom limit switch), but that 
on/off switch was dead when we got it.

We removed the broken on/off switch and jumpered the power cable there 
instead, so now whenever you plug it in to the wall outlet (and lift the 
saw off the bottom limit switch), the motor turns on.

We got the machine running and cleaned it up, and now it's time for a 
new on/off switch.

I think I want a button that latches on, can be easily unlatched by 
punching it (like an e-stop button), and that unlatches automatically 
when the bottom limit switch (or the fuse) opens the circuit.

Any suggestions?


-- 
Sebastian Kuzminsky