The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
The same 3.5 amps - it uses the same thyristor - a BTW68-1200n . There is an upgraded one the BTW69-1200N that is OK for 50 amps , but of course it's the dinky little heat sinks that cause the issue.
cnc-it:
My Partsmaster has the same electronic cabinet as your TC20..same spindle drive and Siemens servo rack with the same style AC servos.
awemawson:
One of the modules in the Sinumerik 820T controller that could conceivably be a cause of the angular positioning fault is the 'Measuring Card' - unlikely but possible. Now I have no issue with buying spare cards as shelf spares if the price is right,but these things have been fetching several hundred pounds on eBay, and some sellers asking over £1K :bugeye:
Imagine my surprise when one popped up for £12.95 'buy it now' (OK plus £16 postage) on German ebay carrying a 3 month warranty. It took microseconds for my finger to press the button. Now you tend to get what you pay for, but the seller has good feedback, has already given me feedback, and confirmed the order.
Now frankly it's very unlikely to be the fault, but well worth having 'on the shelf' :ddb:
(anyway it's not corroded like mine - see the pictures, first mine then the one I've bought)
awemawson:
Today the Post Man brought a mystery package from deepest Hampshire - odd - not ordered anything from there. Well my face split into a grin when opening it I found two 25 mm shank index-able lathe tools kindly sent to me by Pete W. - gosh Pete thank you so much - those will be extremely handy :thumbup:
:mmr: :mmr:
Pete W.:
You're welcome, Andrew,
I had a sudden qualm - are they the correct 'hand'? But I checked your photos on the previous page of this thread and I see that the new tools you bought are both RH and LH, phew!!
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