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Parallel Port breakout boards, motherboards, and dedicated accessories / Relay LED on, no continuity
« on: December 12, 2016, 07:39:38 AM »
G'day, Am having trouble getting relays to switch. Bob is PMDX-126. Mach3. Gecko 203V. Oriental steppers. WinXP through LPT1. SheetCAM from TurboCAD Deluxe.
Have been running this MechMate 8x4 for a few months mostly making plywood boxes with finger joints. Have processed more than 60 sheets of ply with a large China water cooled router spindle turning straight, 2 fluted 4mm bits. Quality of cuts has gradually improved whilst I tuned feeds, speeds, stopping on certain angles etc.
Am setting up small plasma power source to experiment. My problem is that I can not get the plasma torch to fire. Have worked my way back to the relays on the PMDX-126. When the M3 command is received by Mach3 the PMDX relay led lights though no continuity or 'click'. Same behaviour on K1 and K2. Attempted a work around and purchased an arduino compatible relay board. Ran it up on J6 pin 14 after removing jumpers from JP1 and JP2. Same behaviour. LED lights though no 'click' or continuity.
The only slightly 'weird' thing about my machine is that the homing/limits are proxys, run hot, triggering relays, powered by an external 12v supply.
Any help greatly appreciated.
Have been running this MechMate 8x4 for a few months mostly making plywood boxes with finger joints. Have processed more than 60 sheets of ply with a large China water cooled router spindle turning straight, 2 fluted 4mm bits. Quality of cuts has gradually improved whilst I tuned feeds, speeds, stopping on certain angles etc.
Am setting up small plasma power source to experiment. My problem is that I can not get the plasma torch to fire. Have worked my way back to the relays on the PMDX-126. When the M3 command is received by Mach3 the PMDX relay led lights though no continuity or 'click'. Same behaviour on K1 and K2. Attempted a work around and purchased an arduino compatible relay board. Ran it up on J6 pin 14 after removing jumpers from JP1 and JP2. Same behaviour. LED lights though no 'click' or continuity.
The only slightly 'weird' thing about my machine is that the homing/limits are proxys, run hot, triggering relays, powered by an external 12v supply.
Any help greatly appreciated.