The Craftmans Shop > New from Old

The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)

<< < (8/254) > >>

awemawson:
I think my next task must be to see if the controller Power Supply works with all the cards out - and if it doesn't then fix it.

There is another plug in battery compartment suspended above the  CRT - not yet been able to withdraw it, and also there is another logic crate labelled up "MPG Module" and "I/O Module"  which interfaces to Card B via an umbilical cord with that very corroded plug.

 . . .oh joy  . . . off to google these cards . . .   :coffee:

"Card B" = 570 212 9202.10

Sub Module with the RAM & Battery = 570 342 9101.00

Spurry:
That's an incredible amount of damage from what looks like a puny little battery.
I wonder how long it took to get to that state...
Pete

awemawson:
Well Pete, the sticker says that the battery was changed  18/09/08 so best part of ten years ago . . but which battery are they referring to . . the other one mounted in a sliding drawer over the CRT unplugged reads  3.65 but drops to 0.15 volts when plugged in according to it's monitor points, but they don't seem to go directly to the battery - four wires leading away from the tray into the depths of the controller. To get that (good until 2007!) battery to drop to 0.15 volts I have to load it with 2.2 ohms so obviously those wires are going somewhere else !

Progress report - that badly corroded Card-B - I've manage to source one in Germany for a modest £50 including postage, but not the little sub module yet. I can find very similar ones that have some components missing from the board. I suspect that as the controller evolved they went away from battery back up and went to NV Ram, altering that little board to suit

I have powered up the Power Supply and the 5 volt line at least is working - it provides +5 volts and and +/- 15 volts but I can't find a convenient point to monitor the +/- 15. I took a chance and plugged all the cards back other than Card-B and the PSU held up , there was static on the monitor screen and the one LED on the cards illuminated

nrml:
Pardon my ignorance. Are these cards made by Siemens for a number of different applications or are they custom built for the manufacturer and model?

awemawson:
Siemens made a range of industrial CNC controls under the Sinumerik name - dependant on the machine tool makers requirements a standard controller crate would be stuffed with more or less goodies.

Basically they are microprocessor driven computers with many custom algorithms for motion control, and I/O (input / output) to suit the application. So that horrid card that I'm calling 'Card-B' has on it battery backed RAM memory for machine parameters, an interface for the probe, and a bus highway driver to a remote set of I/O mainly hidden under the controller in the MPG and I/O crate (Shown in the picture above 'More Electronics') This seems to have got off lightly with just one corner affected. I will have to pull it out and clean it up, but I >THINK< it's recoverable :scratch:

The white deposits remind me of dry rot fungus  :bugeye:

Navigation

[0] Message Index

[#] Next page

[*] Previous page