Remote Cylce Start and stop button

[R.DesJardin]

Has anyone done this?
It seems like a good idea to be able to Cycle start with out using the mouse or hitting Alt+R. Also the E-stop button could be handier. So my solution would be a remote setup similiar the the Jogging pendant.
Anyone done this and or could tell me if it could be done.

[Switcher]

Isn't the Tormach cnc Control, just a modified Mach3 screen? If so, I think this would be a very simple pendent.

http://www.cnczone.com/forums/showpo...05&postcount=7


Most useful add-on to your CNC?

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[R.DesJardin]

Well all I want is two switches Cycle Start and E-Stop. Just for when I'm doing tool changes I can easily start the machine. I don't like having to use the mouse and I don't need all the features of a gaming controller. I already have the Shuttle Jog Controller from Tormach. I suppose I could hot wire a mouse into a new housing and replace the switches and have it do what I need.

[BlueFin]

Originally Posted by R.DesJardin Well all I want is two switches Cycle Start and E-Stop.

You need a keyboard encoder, someday when there is time I am going to machine a box with a lid and mount switches in it. Spring return toggles for each axis and all the other common stuff (feed hold, etc.). These sit in-line between the keyboard and the PC and when you push your external switch they generate a keyboard command and send it to the PC. They are usually programmable to whatever command you want, such as "Ctrl-Page Down" for incremental -Z Axis travel.

http://www.ultimarc.com/ipac1.html

http://www.hagstromelectronics.com/p...s/modules.html

They use these in building PC based Arcade Games.

[BlueFin]

Looks like the KE-18 would do it for $44.95, unless you had to have a USB keyboard instead of PS2.

http://www.hagstromelectronics.com/c...talogPages.pdf

[zephyr9900]

Originally Posted by R.DesJardin Well all I want is two switches Cycle Start and E-Stop.

Those are two really different functions. Cycle start is just a software button on the screen that tells Mach to start interpreting the gcode, and that can be twinned by one of the keyboard wedges that BlueFin mentioned.

But estop is a physical switch that drops out the main contactor. That can't be done in software. I did add a second estop switch to my machine. It is in series with the switch on the operator panel, so that pressing either switch will stop the machine. It's at line voltage (the 110V control voltage) and I used a true mushroom estop switch (you can buy them pretty reasonably from Automation Direct).

Randy

[saabaero]

I have thought about extending one of the axis limit switches to a button on the front of the machine. If I'm testing a program and there is an eminent danger of a crash I normally hit the "E" stop button which could cause the machine to loose position. It seems like it would be better to activate an exis "end of travel" instead.

[zephyr9900]

Or instead of estop do you mean the "Stop (Alt-S)" onscreen button, R.DesJardin? That of course could be twinned by the keyboard wedge. It isn't an estop since it is just a software command (rather than physically cutting machine power), but it also can cause loss of position since it stops the machine motion without controlled deceleration.

Randy

[zephyr9900]

Originally Posted by saabaero It seems like it would be better to activate an exis "end of travel" instead.

I don't think that activating a limit switch will be any better than alt-S. It stops motion suddenly (no deceleration) and also causes the machine to lose its "referenced" status so anything that depends on machine coordinates (M998 etc.) won't work.

Randy

[R.DesJardin]

Sorry, yes I meant cycle stop(Alt S), which stops all motion, not shut the machine down. Just a simple start stop set up that's easier than using the mouse. Change a tool and bam go. I just don't like having to handle the mouse after a tool change.

[ger21]

All you need to do is wire the switches to inputs on the breakout board and set them up as OEM triggers in Mach's ports and pins.

[zephyr9900]

Gerry, the Tormach, being a proprietary piece of equipment, doesn't have a BOB. You did make me look at the Machine Control Board though. Nothing like available digital input terminals there that I can identify.

Also, "ports and pins" are absent from the interface, unless you sign a waiver with Tormach after which they give you the instructions for accessing the hidden setup parameters.

Which does leave us with a keyboard wedge, or physically splicing into existing switch wiring where available...

Randy