Thread: BobL's shed fit.

I like the ducting Bob.
I have the same dusty and plan to duct it through the shed, when it is finished.

I would like to pick you brain on materials etc at a later stage or find your previous post.

Clink! clonk!
I know that sound.

Originally Posted by Scally

I like the ducting Bob.
I have the same dusty and plan to duct it through the shed, when it is finished.

I would like to pick you brain on materials etc at a later stage or find your previous post.

Pick away.

Back in july last year I set my Woodfast Mini lathe up with a 1HP 3-Phase motor with a 19 mm shaft and a VSD.
The original 1/2 HP Woodfast motor uses a 14 mm shaft and although I could have drilled out that pulley to 19 mm, I did not want to do that because of the hassle of going back to original motor if I ever decided to sell it.
I contacted Woodfast about purchasing another pulley and they did reply and said it would take about 8 weeks but the i realized that if I drilled out a Woodfast pulley that would not leave much metal on the pulley for the locking screw so I decided to have a crack at making my own pulley

Firstly I turned up a blank (in lathe chuck) also shown is the original.
Originally I was only going to make a 3 (instead of a 6) step pulley which combined with the VSD would give me more than a sufficient range of speeds, but I decided to go all the way with a 6 step.
Blank.jpg
The shaft on the 3 Ph motor is a longer than the Woodfast motor so I could make the pulley longer and locate the locking screw outside the belt contact area

Then I had to work out a way of forming the 3-rib V-belt grooves.
I shaped a bit of tool steel using a thin kerf cutting wheel and a dremel.
It's not a super neat fit but hey - it works.

Vbelttool.jpg

FInished pulley.
The tool galled and chattered a couple of times and roughed up a couple of the Vees but I made theme smooth enough for the belt to run freely with a needle file and bit of wet and dry
pulleyf.jpg

Pulley on motor shaft
IMG_3368.jpg

All done, 3Ph motor is also slightly quieter than original motor even at 100 Hz
LatheWW.jpg
I have set the motor up to cover and range of 20 Hz to 100 Hz (actually can go to 120 Hz) so I will probably never use the inner and outermost two steps.

looking good
Would of taken a while to get that tool correct. I did one once but I only made one tooth tool that was hard enough.

Russell

Bob

Just keep an eye on your motor temperature if you choose to run it down the bottom end of the range.

I have become aware recently that some of our VSDs at work have a separate cooling fan for just this purpose. I doubt that you will be putting the same level of demand on your lathe, but it is worth bearing in mind if a job comes up where you need to run it at 20Hz.

Having said all that I think your 6-step pulley is going to eliminate the need to use 20Hz for any length of time.

Regards
Paul

Just an update as to what's happening in my shed since January.

I have added a VSD to my DP - more details here.
IMG_3605.jpg

Currently I'm building a natural gas powered forge - this is not initially going to be used in the shed as I don't have a gas bayonet in the shed (yet)
SWMBO is allowing me to keep it on the back veranda because she has a strong interest in using it for some glass work but when visitors come it has to be moved pronto into the shed - hence the mobile/trolley arrangement.
WIP here.
NewForge.jpg

Will we be seeing a funny vid of you chasing the forge around the back veranda, once you light it?

Originally Posted by Pat

Will we be seeing a funny vid of you chasing the forge around the back veranda, once you light it?

Could be!

I have had several comments about it looking like an instrument of interest by the Department of homeland security.

When I finish it I'm thinking of painting it black adding some fins and calling it "fat boy"

Bob you have to stop spoiling yourself!!!

Originally Posted by artme

Bob you have to stop spoiling yourself!!!

why?

Originally Posted by Sawdust Maker

why?

Coz I'm jealous!!!

fair enough then.

Forge is running. More details? go to the end of this thread.

Great to see you are forging ahead with your retirement. It really does beat the hell out of "work".