04-03-2013, 04:55 PM
Hi,
Thanks Ted; yes I'm still at it with this project. I was brought up with big machinery from the age of 15 so big is beautiful for me and I like machines to have plenty of grunt. I happened to have two 1.1KW 3 phase motors to hand which I obtained for a thank you whilst I worked at Brook Motors where they were manufactured so I'm happy to install one into the Jubilee; I doubt very much if a nasty dig in with a skew chisel will stop this motor especially as it is being powered through the VFD with overload boost.
Its a pity your clutch motor isn't bigger Ted or I would have been pleased to buy it from you.
I've just had some fun in the workshop and failed miserably to get this slipping belt clutch to work. This morning I ordered a clutch cable through eBay only costing £4.99 thinking it would save playing around a lot with linkages to get this clutch to work by lifting the motor? Out of curiosity I set everything up and because of the opening in the pedestal base I was very limited to the amount of hinging of the motor but thought 1.5" would be sufficient to break the drive to the mandrel; how wrong I was; at maximum motor lift the mandrel was still being driving flat out no doubt due to the "A" section belt; the mandrel didn't even slow down when I tried to brake the pulley using a length of timber; had a flat belt been fitted then this would surely have slipped given this amount of motor lift; I even tried to gain extra lift by installing the "T" box to the side of the motor rather than have it on top but it didn't work. With the motor fully lifted the belt was very slack; just goes to show how good these belts are at transmitting power.
All in all a total failure but I'm not too worried as this is only a set back: I have other options; I can simply use the VFD to control the motor but I don't want to do this; I could set to and make a new cone clutch to the drawing design Ted kindly sent me; I could install the electro magnetic clutch to see how this would perform and I could also buy a motor with a clutch already installed; these are available through eBay.
Apart from the dire weather I've so far enjoyed tinkering around with this project and its a pity the slipping belt didn't work; strange isn't it that for the last 50 years I've been preventing belts from slipping? I was using a brand new belt and the original aluminium pulleys.
A thought has just occurred to me; I am hinging the motor towards the rear of the lathe so in effect the motor is driving the belt downwards; have I slipped up and perhaps the belt would slip if the motor was hinged in the opposite direction? As I say I'm used to getting belts to drive not to slip so this is something new to me; I might experiment a bit more before abandoning this idea? If there is two ways to do a job I always do it the wrong way first but it adds to the fun.
Kind regards, Col.
Thanks Ted; yes I'm still at it with this project. I was brought up with big machinery from the age of 15 so big is beautiful for me and I like machines to have plenty of grunt. I happened to have two 1.1KW 3 phase motors to hand which I obtained for a thank you whilst I worked at Brook Motors where they were manufactured so I'm happy to install one into the Jubilee; I doubt very much if a nasty dig in with a skew chisel will stop this motor especially as it is being powered through the VFD with overload boost.
Its a pity your clutch motor isn't bigger Ted or I would have been pleased to buy it from you.
I've just had some fun in the workshop and failed miserably to get this slipping belt clutch to work. This morning I ordered a clutch cable through eBay only costing £4.99 thinking it would save playing around a lot with linkages to get this clutch to work by lifting the motor? Out of curiosity I set everything up and because of the opening in the pedestal base I was very limited to the amount of hinging of the motor but thought 1.5" would be sufficient to break the drive to the mandrel; how wrong I was; at maximum motor lift the mandrel was still being driving flat out no doubt due to the "A" section belt; the mandrel didn't even slow down when I tried to brake the pulley using a length of timber; had a flat belt been fitted then this would surely have slipped given this amount of motor lift; I even tried to gain extra lift by installing the "T" box to the side of the motor rather than have it on top but it didn't work. With the motor fully lifted the belt was very slack; just goes to show how good these belts are at transmitting power.
All in all a total failure but I'm not too worried as this is only a set back: I have other options; I can simply use the VFD to control the motor but I don't want to do this; I could set to and make a new cone clutch to the drawing design Ted kindly sent me; I could install the electro magnetic clutch to see how this would perform and I could also buy a motor with a clutch already installed; these are available through eBay.
Apart from the dire weather I've so far enjoyed tinkering around with this project and its a pity the slipping belt didn't work; strange isn't it that for the last 50 years I've been preventing belts from slipping? I was using a brand new belt and the original aluminium pulleys.
A thought has just occurred to me; I am hinging the motor towards the rear of the lathe so in effect the motor is driving the belt downwards; have I slipped up and perhaps the belt would slip if the motor was hinged in the opposite direction? As I say I'm used to getting belts to drive not to slip so this is something new to me; I might experiment a bit more before abandoning this idea? If there is two ways to do a job I always do it the wrong way first but it adds to the fun.
Kind regards, Col.
Happiness is a wreck of a cabinet to restore.
