Guest
Show Posts
51
General Mach Discussion / Re: Limit switches OEM trig
« on: January 17, 2011, 10:58:16 AM »
Court,
Please note the C25 only provides additional filtering to regular inputs of the Smooth Stepper (pins 2-9 on LPT2 are different), so the inputs should work as described in the Smooth Stepper manual: http://warp9td.com/documentation/SmoothStepperUserManualV1.0.pdf , page 25. The input pins are pulled up, so you should run a GND through the NC connection of the switches, so it will be a ground signal what should trigger the signal.
Pins 2-9 LPT2 on the C25 work differently. This they are not buffered on the C25, we added buffering and Schmitt triggers like it is done in our breakout boards.
My recommendation is that you input those pins on LPT2 pins 2-9 and activate them with a high running through the NC position of the switch. It is always better to use a high on limits and e-stop as if a cables gets pinched somewhere in the machine and it ends up making contact with ground, will trigger the fault immediately.
I will look for the post that you mention in mach support forum and place a copy if this there.
Arturo Duncan
http://cnc4pc.com
Please note the C25 only provides additional filtering to regular inputs of the Smooth Stepper (pins 2-9 on LPT2 are different), so the inputs should work as described in the Smooth Stepper manual: http://warp9td.com/documentation/SmoothStepperUserManualV1.0.pdf , page 25. The input pins are pulled up, so you should run a GND through the NC connection of the switches, so it will be a ground signal what should trigger the signal.
Pins 2-9 LPT2 on the C25 work differently. This they are not buffered on the C25, we added buffering and Schmitt triggers like it is done in our breakout boards.
My recommendation is that you input those pins on LPT2 pins 2-9 and activate them with a high running through the NC position of the switch. It is always better to use a high on limits and e-stop as if a cables gets pinched somewhere in the machine and it ends up making contact with ground, will trigger the fault immediately.
I will look for the post that you mention in mach support forum and place a copy if this there.
Arturo Duncan
http://cnc4pc.com