The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
DICKEYBIRD:
--- Quote from: awemawson on June 18, 2018, 03:43:03 PM ---TSuggestions please for a suitable oil proof paint that will stand total immersion for long periods.
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POR15 gas tank sealer maybe? I used some of their rust paint on a rusty Ford floor pan & it did very well. Dries glass-hard & seems to be very inert. I would think their gas tank sealer would be even better.
WeldingRod:
Truck bed liner. Make sure they heat it before applying. My father in law made a mobile steel pool lined with the stuff 10+ years ago. Still going strong!
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awemawson:
I realised that getting the coolant tank where it needs to be might be a bit of an issue, as the workshop is a bit cramped now (!) so I made up a bit of wood to act as an analogue of the tank - much easier and lighter to manipulate - and in fact there is no problem.
But crawling on hands and knees to see if there was enough vertical clearance to put the tank on rollers (there may be) I made a DISCOVERY . There is a further big panel that can be removed at the back of the lathe (it's about 1 metre square) that I had previously missed. Taking it off it revealed that the original top of the coolant tank has been stuffed in there along with the coolant pick up and pump - just as well I found it before anything starts moving as the pipes are laying on the Z ballscrew. BTW the Z servo motor is HUGE !
Being able to get my head in the back of the machine here has let me have a better look at a mystery louvred metal box fixed on the rear of the axis drive amplifier cabinet. It's 15" wide x 9" deep x 20" tall, has a single umbilical cord of Adaptaflex trunking going into it and absolutely no markings what so ever. I suspect that it houses a transformer or maybe from the shape several transformers :scratch: Perhaps I'll be able to open it up sometime.
Pete W.:
--- Quote from: awemawson on June 18, 2018, 07:17:47 AM ---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.
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Fair enough. I've just looked up the capacity of the ½ AA size lithium batteries and it seems to be only 1.2 Amp hours.
awemawson:
The nice man from UPS (Jock) came in after lunch with a parcel from Germany containing the replacement I/O card, Sheradised mounting plate and Umbilical cord that connects the Sinumerik 820T controller to the remote I/O unit. All second hand but looking in excellent condition
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