AndyUK's Build - 1.2x1.0m Gantry

[AndyUK]

Haha - well, I'm glad I'm not the only one. It has prevented me smoking my other relays, which were also 24VAC... and I've managed to find a replacement 24VDC contactor at work which was for a machine we removed a long time ago and otherwise going to waste.

I was born before the Berlin wall fell, but not by much - so I'll have to take your word on the 60s! :)

Now that the contactor is working as expected I can share my E-Stop circuit video as promised! I appreciate its the same as everyone elses, but hey, its a progress milestone. I also couldn't resist playing with the LED switches - the Red is E-Stop reset, the Green is the motor drive power latch, and the Blue are auxiliary switches for water pump/air solenoid. There will also be a yellow momentary limit OVR, but I haven't gotten around to installing that one yet. The plan is to have a control panel on the front of the machine rather than at the electronics box - so at the moment everything is wired up to these terminals at the top of the plate, and then I'll take them to the panel with a couple of 7-core CY cables.



I've also got the signals for the motor drivers wired in, and I've connected up the Z axis motor just to test the communication with UCCNC, so theres a video of that in the mix as well - enjoy! You'll see the Y and X drivers instantly fault out - the UC300 is reading those fault signals, however they're currently configured the wrong way around (I'm waiting for my RJ11 crimper to reprogram the drivers). The fault signal wiring has changed somewhat from my last published schematic; my plan is to use the OSSD on the UB1 to enable or disable the drives, so that a fault signal on one drive causes all of them to stop - but again I need to program the drives to listen to the enable line.



The proximity switch has also been tested, although my trial one was an NC 2mm NPN - 2mm is a bit small, so I'm planning to try a 4mm next. I'll probably use proximity switches for both limits and homing, but thats still up for debate.

[Kitwn]

I was born before the Berlin wall fell, but not by much - so I'll have to take your word on the 60s! :)

I was born before the Berlin wall was built, but not by much, so whilst I saw the 60's I didn't learn about their control systems until the 80's.

Nice work on the controller. Yours is much neater than mine!

Kit