Denford Mirac Electronics Refurbishment

[irving2008]

Welcome aboard!

From a quick look at the wiring diagram, you should be able to drive the X and Z steppers (bipolar parallel wired, see sheet AC6-05) directly off the Geckos. Looks like steppers run off a seperate power supply integrated on slave board, but no indication of voltage.

X and Z homing (datum) sensors are 24v but should be interfaceable OK.

Spindle motor might be trickier, its 3-phase, and the spindfle and toolpost drive seems to be 1-phase in, 3-phase out but not clear at what voltages - suspect 415v. Spindle encoder goes back to slave board then a 2-core screened goes to spindle control board - I'm guessing thats a control voltage for spindle speed. Should be able to drive that direct from Mach.

[CHudson]

Thanks Irving2008, I'm going to try to get the geckos in place over the weekend as I believe the attempted delivery today even though I only ordered on Monday from the states! I'll have to take a good look at the toolpost/spindle drive as there is defiantly only 230 going on, I guess maybe its an 3 phase inverter.

I have attached a few pictures of the lathe, there not the best as my camera was going flat and I couldn't use the flash.

[CHudson]

Today I brought the electronic control box home and got the geckos out of their packaging. I was quite shocked how small they are but they seem to be excellent quality. Gecko shipped them very quickly, I received them within 3 days all the way from the US!

Anyway I sat down with the control box and started working out what's what. I have identified the X and Z axis's on the slave board and also the drive supply. I has hoping to work out what voltage the steppers run at by measuring it from the drive supply connector but it seems it does not output any voltage when not connected.

Does anyone happen to know what cables go to what on these steppers. If not can I just work it out by doing a continuity test?

Heres a few pictures: