I am not disagreeing, Max. But none of the equipment that I designed needed a reversing function and so it was not important to the specifications. My reversable winch is a first, previous ones were always purchased by others as complete system packages.

 

But why then give misleading info such as

some of them do offer that option..

which tends to give the impression that it is not a normal feature.
Max.

 

Maybe the VFD option would give control needed.
Max.

But also for the price of just a VFD a chain fall could be bought. And this doesn't even address the brake issue on the electric hoist. I've used over the years electric hoists that had an "inch" button on them, when working with both large/heavy molds and dies, they were still hard to control when you get close to the final position.

And the chain fall could also be used elsewhere if needed where there is no electricity.

 

But also for the price of just a VFD a chain fall could be bought.

True, it depends somewhat on the working environment, the ones I have worked on or converted were all used in a production environment for such as loading docks, (Gantry) or small hoists that ofen were fitted/modified for magnet lift for loading parts into a CNC machine etc.
Max.

 

How did you control the VFD at the pendant? An add on pot? The molds and dies I was talking about weighed a ton or more.

 

Some were set up for the fixed speed VFD input options, they usually have up to 6 or even 8 set rpm inputs if needed.
But one was a P.B. for normal operation and another P.B. for the low speed jog .
Another could be set up for intermediate speed if needed.
Max.

 

After looking at the VFD connection issues, things become a bag of worms, Shortbus is probably right, I have a CM come along which I can hook to my Budgit hoist hook and use the CM for fine control.
Thanks guys, I've learned a lot from this forum over the years.

 

After looking at the VFD connection issues, things become a bag of worms, Shortbus is probably right, I have a CM come along which I can hook to my Budgit hoist hook and use the CM for fine control.
Thanks guys, I've learned a lot from this forum over the years.

That's what I started out years ago changing engines with. But once I had the chance to help a guy in his garage a chain fall is way better even than a come along. The chain fall is just more even moving, not one notch to the next like the come along.

The electric hoist is great for moving fast, but in an engine change your usually only lifting a minimal height and getting motor mount bolts lined up is much easier with a chain fall/chain hoist. I was usually doing it by myself and the chain fall was the easiest way I found of doing it.

 

You must have forgot how the excess chain gets caught on everything possible

 

After looking at the VFD connection issues, things become a bag of worms, Shortbus is probably right, I have a CM come along which I can hook to my Budgit hoist hook and use the CM for fine control.
Thanks guys, I've learned a lot from this forum over the years.

A heavy duty turnbuckle of a suitable size would give you much finer adjustment ability and be simpler to rig. Really, all of the fine adjustment would be less than 4 inches. And a well greased turnbuckle is not that hard to turn, if it is a finer thread style one.

 

You must have forgot how the excess chain gets caught on everything possible

I shortened my "pull" chain so it isn't as long, just about shoulder high now. There is little or no actual strain on the 'pull' chain, the one that moves the lifting chain. You have the same problem with the extra chain on a chain come along.

 

If a VFD was used the brake could be fed from a separate contactor or relay switched off one of the VFD outputs such as At-Zero-Speed etc.
The coil voltage is fed in a typical manner on these types of hoist, off of a bridge in series with one of the motor phases. 230 or 460.
Max.

 

If a VFD was used the brake could be fed from a separate contactor or relay switched off one of the VFD outputs such as At-Zero-Speed etc.
The coil voltage is fed in a typical manner on these types of hoist, off of a bridge in series with one of the motor phases. 230 or 460.
Max.

Max, how does that work to have the bridge in series with one leg of the motor? It seems to me that there would be a voltage drop across the bridge and that leg of the motor would be weak.

 

Trace the wiring in the drawing, the impedance of the brake is very low.
Also the two pairs of windings are in parallel.
If you feed it separately, it may not take a lot of voltage to energize it.
Max.