Lathe increases speed on its own

[munruben]

My variable speed Dynalink (don't laugh) lathe wont stay at its lowest speed but keeps increasing its revs as I turn. what might be causing this? The handle that controls the speed of the lathe visibly moves clockwise and the revs increase without any help from me. this is a bit annoying when I try to turn something at a low speed.
any ideas guys?

[oldiephred]

Not sure about that model but most have a series of indents in the frame ino which a spring loaded ball fits to hold the desired setting OR some require that the handle be pulled outward to disengage a retaining pin while resetting the speed. Some might have a simple friction system.

Good luck

[hughie]

Most likely after checking the detents is that there is usually a system of spring which hold the variable drive pulleys together and as you change speed one opens up and the other closes. Most likely you have a spring problem and or a worn belt.
Check to see if any of the springs are damaged or broken it could either the driver or the driven.
Its not a uncommon fault with vari-speed drives and is easy to rectify. When you put them back together use a dry lube as this will not attract the dust and will save having to go back and clean the dust off etc as it stiffens up.

Annoying? Yes, major issue? No, as it can be readily fixed and when you do it, it should provide many years of service before it occurs again

[munruben]

Thanks guys will have to investigate further and see if I can see what is causing the problem.

[Rifleman1776]

You didn't say, but I'm surmising this is a Reeve's type VS drive.
I would suggest just a good cleaning of all parts, springs, shafts, and especially the detents.

[Cliff Rogers]

John, your lathe is trying to tell you something.

[munruben]

John, your lathe is trying to tell you something.

Yeah, but whats it saying Cliff?

[munruben]

You didn't say, but I'm surmising this is a Reeve's type VS drive.
I would suggest just a good cleaning of all parts, springs, shafts, and especially the detents.

Not sure about the Reeves type thing but I think a good cleaning will be in order for sure. Thanks

[hughie]

John, here we go this will help with your variable speed drive and give you an idea of what going on under the hood. This type is pretty well standard for vari speed belt drives and all vari speed belt drives are commonly called Reeves.

Continuously variable transmission - Wikipedia, the free encyclopedia

[wheelinround]

John hang 5 will be right there

Hope its sorted soon otherwise Erns got a DVRxp for sale

Hughie If you come across one of these File:Swashplate anim metal.gif - Wikipedia, the free encyclopedia
or should I steel the sons

[hughie]

or should I steel the sons

steel it

[Cliff Rogers]

Yeah, but whats it saying Cliff?

Geeze you're slow john.... Oops, I think I said it....

[munruben]

Thanks Ray, thanks Hughie,

[munruben]

Geeze you're slow john.... Oops, I think I said it....

Hey Cliff! You can go off people you know.

[RicB]

The handle that controls the speed of the lathe visibly moves clockwise and the revs increase without any help from me.

Hmmm, could be a woodergeist