The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
Pekka,
There is a pair of external terminals on the PSU labelled "Power Supply OK" - they are not connected, but of course may also be routed internally to the backboard of the logic crate. They seem to be a N/O relay contact that closes a second or two after the PSU is powered up. Certainly they change state when the 'Reset' button on the PSU is pressed then revert to the closed state after a second.
Of course I have no idea whether relay open or closed is the good state, but as with no mains they are 'open', the likelihood is that 'closed' is 'OK'
PekkaNF:
Those PSU external contacts are normally routed to big red light on the control cabinet and to maintanance system to tell maintenace dude to change the filters..or check esternal cooling air system. Think that overheating and some other stuff trips them. There were more signals on the bus. But that was in S5 industrial PLC, just earlier noticed that much of hardware and numbers looks pretty much the same I was used to see - long time ago.
Pete W.:
Andrew,
I've just been catching up on this thread, reading back to page 2 where you write about battery leaks. I have some battery holders for ½ AA size lithium batteries (as used on old Mac computers). I also have a few of the batteries as well (unused but they've been on the shelf for a few years). If they'd be any help to you I happily put some in the Post.
awemawson:
Pete that is an extremely kind offer, but these are very high capacity units. The cylindrical one is 8 ampere hours with a 10 year life expectancy so I don't think 1/2 AA would cut it in this instance.
I am going eventually to re-mount the batteries in a more accessible place, but will use the same type as original, and probably install capacitors across the leads where the batteries currently are to guard against stray pick up of noise.
awemawson:
This is the coolant tank that slides under the machine and catches coolant from above. A pipe to a self priming pump sucks it back up and squirts it about at a great rate of knots.
Previous owner had left it outside to rust so it needs grit blasting and then spraying. Suggestions please for a suitable oil proof paint that will stand total immersion for long periods.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version