The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
djc:
Is there any opportunity to increase the stiffness of the tool by adding a gusset (or two)?
The one in the 'down' direction could be a 5mm plate with a triangle under it, bearing on some other part of the machine. Tool just sits on top of it.
The one in the 'back' direction might need a little more thinking about.
If you wanted to persevere with the boring bar, a big, hollow sleeve loctited to it with a square end bearing against the toolholder would help (eccentrically bored to put the extra material in the most useful place).
awemawson:
Thanks for the suggestion - that sort of over hang is always going to give trouble I reckon.
If I'm desperate I can cut the tool shank to shorten it (but check first that the proposed length still reaches without entering the forbidden zone) but I don't want to really as that's a relatively new (and not cheap) tool.
Pete W.:
What would happen to such a tool support if the program told the tool turret to rotate?
awemawson:
If all is well in the world, the PLC program should inhibit tool changes (and hence turret rotation) if the main lathe spindle is rotating.
If it DD happen due to a combination of several faulty circumstances it could be disastrous. particularly with the original chuck weighing over 47 kg and possibly spinning at 3500 rpm - that's a whole lot of energy stored :bugeye:
AdeV:
How big is that boring bar Andrew?
I've got a 32mm diameter one here which I've never used, and never will (it's far too big for my lathe), which I'd be happy to send to you... you can cut it down to the length you need.. The only thing is, it doesn't have through coolant.
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