Micky J
New member
I have recently purchased a Axminster Perform Lathe, i had to change the pulleys and since then it is going too fast on slow speed, i don't know what i have done wrong.
help. Micky J
help. Micky J
Axminster Perform Lathe
- Thread starter Micky J
- Start date
Help Support UKworkshop.co.uk:
either the motor is spinning too fast or the pulley is the wrong size. It cant be anything else I dont think.
Did you change the motor or just the pulley? was the pulley a like for like swap? Could somebody else have changed the motor before you got the lathe?
Did you change the motor or just the pulley? was the pulley a like for like swap? Could somebody else have changed the motor before you got the lathe?
Phil Pascoe
Established Member
If you've put a different pulley on it, it's a different size. The speed of the motor won't have changed. Only slow speed? Everything else the same?
CHJ
Established Member
If the Perform lathe has a Reeves Drive (variable cone pulleys) you have two possibilities of wrong adjustments.
1. The Drive spindle mechanically adjusted pulley is not set correctly and is not closing sufficiently to force the belt right up level with its periphery.
2. The alternate is that on the motor, the fixed (back half) set wrong so that the belt tension can not push the cones apart against the spring.
It needs to set so that the belt is just clear of the motor spindle when fully open.
Assuming both pulleys are set correctly, replacing the belt with one of incorrect length could give similar problems unless motor mounting is adjusted.
1. The Drive spindle mechanically adjusted pulley is not set correctly and is not closing sufficiently to force the belt right up level with its periphery.
2. The alternate is that on the motor, the fixed (back half) set wrong so that the belt tension can not push the cones apart against the spring.
It needs to set so that the belt is just clear of the motor spindle when fully open.
Assuming both pulleys are set correctly, replacing the belt with one of incorrect length could give similar problems unless motor mounting is adjusted.
Phil Pascoe
Established Member
Good thinking. It didn't occur to me that it was a reeves.
Micky J
New member
Thanks everybody for trying to help me, i did purchase a new motor and pulleys from Axminster so i know these are correct, Chas what you say sounds plausible. How do i get it back to factory settings. Micky J.
CHJ
Established Member
On the motor, the inner flange needs to be secured on the motor spindle at a position that allows the belt to close down until it's just clear of the motor spindle when the spring loaded outer is compressed.
Be very careful on how you try to compress the outer flange against the spring, the cast metal is very vulnerable to point loads, you need to apply pressure over as wide an area as possible.
On the lathe headstock spindle with the speed selection linkage in the low speed position the mechanically adjusted cone must be set so that the belt fits snuggly with its outer surface level (or nearly so) with the edge of the cones.
With the headstock cone set correctly the motor cone should be forced open to the point the belt is still gripped by the taper and its inner surface not in contact with the motor spindle.
Likewise in reverse, at the highest speed setting the belt should be still trapped by the cones and not riding on the lathe spindle.
Always rotate the mechanism whilst trying to adjust the speed, even if it's only by hand, it's the only way that the forces can direct the belt to ride up and down the cones, moving the change lever without doing this can wreck the change lever mechanism.
Reading through this saga may help Although problem cause by not servicing the machine and then fitting wrong length belt the words of caution, method of compressing spring to fit new belt and the pictures may help.
Be very careful on how you try to compress the outer flange against the spring, the cast metal is very vulnerable to point loads, you need to apply pressure over as wide an area as possible.
On the lathe headstock spindle with the speed selection linkage in the low speed position the mechanically adjusted cone must be set so that the belt fits snuggly with its outer surface level (or nearly so) with the edge of the cones.
With the headstock cone set correctly the motor cone should be forced open to the point the belt is still gripped by the taper and its inner surface not in contact with the motor spindle.
Likewise in reverse, at the highest speed setting the belt should be still trapped by the cones and not riding on the lathe spindle.
Always rotate the mechanism whilst trying to adjust the speed, even if it's only by hand, it's the only way that the forces can direct the belt to ride up and down the cones, moving the change lever without doing this can wreck the change lever mechanism.
Reading through this saga may help Although problem cause by not servicing the machine and then fitting wrong length belt the words of caution, method of compressing spring to fit new belt and the pictures may help.
Micky J
New member
Once again thanks everybody for trying to help me, it is still running a bit fast on slow speed but i can manage to use it, it is a brilliant machine so will put up with it for now.
Micky J
Micky J
