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| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
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| awemawson:
Pete, it will need to 'take the strain' giving upwards lift before the chuck bolts are undone, and similarly when refitting to set it co-axial hence the jib construction which avoids having a hoist fitted as well. If however there is room to fix a compact hand operated winch on the end of your arm system it might simplify things ! |
| vintageandclassicrepairs:
Hi Andrew, A vertical rib length ways along the 1.5m to form a virtual angle iron, plus a couple of ribs at 90 degrees to the long rib near the post and the holding down bolts would help stiffen the base and make it resistant to twist ?? John |
| awemawson:
John yes the base will want to twist - I've planned ribs on the underside |
| smiffy:
If you need to fit a hoist ,have a look at ceiling mounted disabled people hoists on our favorite auction site. They have a very nice 24 volt dc motor fitted to a reduction box and small winch drum which takes a 40 mm wide webbing strap rated at 200 kgs . I have one which I was going to use in a similar set up The whole unit is about 9 inches x8 inches x 6 inches When I get into the work shop I will get some photos There is also a second motor and gearbox to travel the unit across the room in a track the same as used on sliding doors and they have a built in battery pack and remote control unit They often come up for very reasonable money . Mike |
| awemawson:
Mike yes please photos: If I can source a suitable winch / hoist then I'll go with Pete's horizontal arm version as it has several advantages, and even better if I can source a hand powered version as it then becomes entirely self contained. All the cheap ones are what I call 'ratchet winches' where to reverse them you flip the pawl of the ratchet in the opposite direction and my experience of them hasn't been good. They tend to jam in one direction and anyway are rather coarse in their positioning - OK for removing the chuck - not so good putting it back. What I really want is an affordable 'Worm Winch' - these have the advantage of being not only fully reversible as the worm self holds, but enable far more precision in movement. But they are an order of magnitude more expensive :bugeye: Measuring up this morning I find that I have a full 12" clear above the chuck so enough room to do it given the right winch :thumbup: |
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