Boxford TCL 125

[inee]

Hi
The lenze board looks to be a 536 ,manuals are online google, the board on the front of the lenze controller is a optoisolator board, and is easy to connect to ,you need a 10v output on your breakout board, this goes to the 10v and 0v terminals on the opto board. there is a inhibit input i connected it to the Emergancy stop switch, i also had the mains to the speed board run through a relay, switched from the control panel.
see that big relay in the middle leave it in and you can simply wire the input to two relays. you basically want to wire the outputs of the new relay to the inputs of relay to the inputs of the large changeover relay,
The new relay input you can take from your bob using the spindle dir connector..
You can either use the original transformer or replace it with a power supply, leave the choke in.

close the back of the lathe, turn the rotary switch at the top of the rear door, if all is well, there is a circuit breaker just below the mains socket on the rear door of the lathe, you will need to reset it, if that goes well.

If all is well turn off all the control panel switches , depress the red button(emergency stop switch), release the E stop button you may get a few clunks thats just the relays, press the on/ off switch on the control panel , if it all lights up sweet, then press wither of the x or z jog buttons(make sure the pot on the control panel is at zero(ish).then try the motor ,simply press the fwd or reverse buttons a couple of times, each press speeds it up or slows it down.

In the auction pics it looks like a fuse is missing just behind the large capacitor, so replace that before you do anything else.
Don't rip out all the wiring as it' mostly still useable. Replace the mains cable , leave the, control panel wiring in as it make wiring it bac up easier, also leave the interlock wiring as again it's easier to wire.

i have a few files that i will try and find to upload here one is a partial wiring diagram, which will help in wiring the speed controller..

the main board on yours looks different to the ones I've seen (i think it was pot luck, if all the components were on the boards ;) .

[John11668]

Thanks Inee
I suspect that will all fall into place when I get the machine on my bench.
Will keep you all posted .
I have agreed (after a bit of haggling) to buy an auto toolchanger so the project has just extended a bit
Pricey kit , but if I had to buy a toolpost anyway the extra seems justified.