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Generic Spindle interfaces, I/O boards, Misc boards and panels / Re: Additional I/O (Both) for PMDX-126C w ESS and 107
« on: May 31, 2017, 07:18:04 PM »
Steve,
Thanks for the reply. More detail: My machine has been operating as a large 3 axis gantry router with a fourth motor on the slave “A” axis. I currently have 4 gecko 203V drivers daisy chained on two PMDX-134 motherboards. I plan to add additional axis’ and drives as I incrementally upgrade the machine to 4th and 5th axis. I am currently upgrading the spindle to an ATC. This requires four additional inputs, plus a low air pressure fault input. (There is also a square wave signal available proportional to RPM that I don’t know how to capture, would be nice but not essential). The ATC also requires additional outputs to control air solenoid valves for tool change and taper cleaning. Also have a solenoid for coolant/chip clearing, a z height probe, and use the charge pump. I am combining all of the homing/limit switches (NPN proximity sensors), except the slave axis, to free up some inputs. Having read the PMDX-126c manual in detail I believe I have identified all of the inputs and outputs available from the two parallel ports provided by the ESS. If I use the ABCD outputs I may have enough outputs now but these will not then be available for the step and direction signals for the extra axis. I also probably need to use relays to drive the solenoid valves (3) from the outputs. At he same time all of the inputs will be filled leaving no availability for additional sensors. This has me looking at the 8 unused pins on the second parallel port which can be inputs or outputs. Would like to have four of each but the PMDX 108 and 109 boards are all inputs or all outputs. Questions:
Is there a mixed I/O option or other alternative?
If I go with additional outputs, does the PMDX-109 have a manual or other installation info?
What is the feasibility or drawbacks to using an additional I/O device connected through the USB port simultaneous to the ESS/PMDX-126 for less time critical i/o?
Thanks for the reply. More detail: My machine has been operating as a large 3 axis gantry router with a fourth motor on the slave “A” axis. I currently have 4 gecko 203V drivers daisy chained on two PMDX-134 motherboards. I plan to add additional axis’ and drives as I incrementally upgrade the machine to 4th and 5th axis. I am currently upgrading the spindle to an ATC. This requires four additional inputs, plus a low air pressure fault input. (There is also a square wave signal available proportional to RPM that I don’t know how to capture, would be nice but not essential). The ATC also requires additional outputs to control air solenoid valves for tool change and taper cleaning. Also have a solenoid for coolant/chip clearing, a z height probe, and use the charge pump. I am combining all of the homing/limit switches (NPN proximity sensors), except the slave axis, to free up some inputs. Having read the PMDX-126c manual in detail I believe I have identified all of the inputs and outputs available from the two parallel ports provided by the ESS. If I use the ABCD outputs I may have enough outputs now but these will not then be available for the step and direction signals for the extra axis. I also probably need to use relays to drive the solenoid valves (3) from the outputs. At he same time all of the inputs will be filled leaving no availability for additional sensors. This has me looking at the 8 unused pins on the second parallel port which can be inputs or outputs. Would like to have four of each but the PMDX 108 and 109 boards are all inputs or all outputs. Questions:
Is there a mixed I/O option or other alternative?
If I go with additional outputs, does the PMDX-109 have a manual or other installation info?
What is the feasibility or drawbacks to using an additional I/O device connected through the USB port simultaneous to the ESS/PMDX-126 for less time critical i/o?