02-03-2013, 06:01 PM
Hi,
At last I'm working on the Jubilee once again after breaking off due to dire weather conditions.
Many thanks to Ted for sending me detailed drawings of a cone clutch which I found most interesting.
After going to so much trouble obtaining the electro magnetic clutch then spending a lot of time adapting it for the Jubilee I decided against fitting it which might sound a bit strange? I really did like the idea of flicking a switch to start and stop the lathe whilst leaving the motor running at full speed but I did wonder what effect using such a clutch would have in actual use? I'm powering the lathe through a VFD (Inverter) allowing me to install a 3 phase 1.1Kw motor whilst allowing the motor to run from a standard 240V single phase supply; the VFD needs protecting from dust so I plan to remotely mount it from the lathe; the VFD will be switched on; the speed adjusted then I can control the lathe through the clutch; this is the plan.
I've been thinking about the action of the magnetic clutch and think it might be rather too fierce in take up accelerating the work piece from zero to maximum speed in a blink and in wood turning 2,000 revs or even higher is quite common between centers. I had thought about this right at the start but I was interested in having a go at fitting such a clutch.
My alternative plan is to fit a "slipping belt" clutch; this is about as basic a clutch can be. The motor is arranged so that it can hinge slackening the belt therefore breaking the drive. Over the last couple of days I've made decent progress and I've just come out of the garage having spent the afternoon metal bashing. The pictures below show the original motor mount with the new hinged motor mount attached. I've used off-cuts of metal I had to hand but it is robust and should withstand anything a 1.1Kw motor can throw at it. The welding isn't pretty but certainly strong enough for this application and the hinge rod is 1/2" dia mild steel so should last many years. For speed I welded everything rather than use nuts and bolts; it will look OK with a coat of paint. Next job will be to sort out a lever of some kind to lift/lower the motor.
I'm using 8mm stainless steel machine screws which I bought this morning at Rufforth costing 10p each to secure the motor; the underside of the base has been countersunk to accept these. All sharp edges/corners have been removed with an angle grinder.
I'm pleased I had a go with the magnetic clutch and I'm confident I had reached the point where I knew I would succeed should I have carried on with it; I like tinkering around so nothing has been lost; the slipping belt clutch in incredibly simple so hopefully I'll have the Jubilee fully sorted shortly; I'm also considering painting the Jubilee to tidy it up. More to follow but the pictures tell the story better.
Kind regards, Col.
At last I'm working on the Jubilee once again after breaking off due to dire weather conditions.
Many thanks to Ted for sending me detailed drawings of a cone clutch which I found most interesting.
After going to so much trouble obtaining the electro magnetic clutch then spending a lot of time adapting it for the Jubilee I decided against fitting it which might sound a bit strange? I really did like the idea of flicking a switch to start and stop the lathe whilst leaving the motor running at full speed but I did wonder what effect using such a clutch would have in actual use? I'm powering the lathe through a VFD (Inverter) allowing me to install a 3 phase 1.1Kw motor whilst allowing the motor to run from a standard 240V single phase supply; the VFD needs protecting from dust so I plan to remotely mount it from the lathe; the VFD will be switched on; the speed adjusted then I can control the lathe through the clutch; this is the plan.
I've been thinking about the action of the magnetic clutch and think it might be rather too fierce in take up accelerating the work piece from zero to maximum speed in a blink and in wood turning 2,000 revs or even higher is quite common between centers. I had thought about this right at the start but I was interested in having a go at fitting such a clutch.
My alternative plan is to fit a "slipping belt" clutch; this is about as basic a clutch can be. The motor is arranged so that it can hinge slackening the belt therefore breaking the drive. Over the last couple of days I've made decent progress and I've just come out of the garage having spent the afternoon metal bashing. The pictures below show the original motor mount with the new hinged motor mount attached. I've used off-cuts of metal I had to hand but it is robust and should withstand anything a 1.1Kw motor can throw at it. The welding isn't pretty but certainly strong enough for this application and the hinge rod is 1/2" dia mild steel so should last many years. For speed I welded everything rather than use nuts and bolts; it will look OK with a coat of paint. Next job will be to sort out a lever of some kind to lift/lower the motor.
I'm using 8mm stainless steel machine screws which I bought this morning at Rufforth costing 10p each to secure the motor; the underside of the base has been countersunk to accept these. All sharp edges/corners have been removed with an angle grinder.
I'm pleased I had a go with the magnetic clutch and I'm confident I had reached the point where I knew I would succeed should I have carried on with it; I like tinkering around so nothing has been lost; the slipping belt clutch in incredibly simple so hopefully I'll have the Jubilee fully sorted shortly; I'm also considering painting the Jubilee to tidy it up. More to follow but the pictures tell the story better.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
