The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
David Jupp:
http://forums.mrplc.com/index.php?/topic/24709-alternatives-to-step-5/
awemawson:
Thanks for that David, but the available one of those is £600 :bugeye:
I suppose I'm going to have to apply the 'infinite number of monkeys' approach, and just keep slogging on. Now I'm beginning to realise how they felt at Bletchley Park solving their enigma !
cnc-it:
So Andrew is the cooling fan on the FXM-3 a part fix or can you run the motor at full current now..? I've never seen one of Mikes boards but looks very similar to the standard issue FXM-3..are there any advantages using Mikes newer board?
awemawson:
Mike told me it was designed for a maximum of 3.5 amps, so it is on the limit with the size of motor in this beast. But he also told me that of the boards he made, he only had transformer failures, never the thyristor. So having re-set it at 3 amps it's still on the conservative side of the spec, but I far prefer electronic to run cooler than hotter!
The redesigned board is simplified, has only one transformer, and uses a relay to indicate 'OK' rather than semiconductors. I've had the comment from someone else who repaired Beavers that the new cards were more reliable than the original.
cnc-it:
Thanks Andrew that's good to know.. I'm not sure what amps the original board was rated at?
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