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10” Utilathe (Miss Metric) Overhaul Repair

@PeterT : rpm change - nope. I just use the VFD for the 3 phase change. The speed is through the gear head. If I was to change motors to a more VFD friendly motor I might use the speed control. I have not had much issue using the features of the lathe as built - speeds /feeds depth of cut.
I found the motors run hot when you change the frequency- this is also a factor with the voltage out of the VFD. Typically way higher than 220. Somewhere around 265 …. On this I will digress as there is more to explore and the voltage out may be adjustable???

@YYCHM - yes, I neglected her compound as I wasn’t sure / Mr Imperial gets the compound quite chipped up and, well Hmmmmmm
 
Well, Miss Metric is up and running!! Woo Hoo! No chips yet as I have to make a switch lever for the FWD/OFF/REV. But it is spinning and I am grinning!!

Funny thing is that the lead screw rotates opposite to the feed screw. So when threading I need to switch the feed to reverse if I want the travel towards the chuck.
 
Brent H said:
@PeterT : rpm change - nope. I just use the VFD for the 3 phase change. The speed is through the gear head. If I was to change motors to a more VFD friendly motor I might use the speed control. I have not had much issue using the features of the lathe as built - speeds /feeds depth of cut.
I found the motors run hot when you change the frequency- this is also a factor with the voltage out of the VFD. Typically way higher than 220. Somewhere around 265 …. On this I will digress as there is more to explore and the voltage out may be adjustable???
Click to expand...
Even being able to go from say 50-70 hz can be really nice in the middle of a cut. Sometimes a small difference in rpm can eliminate chatter, or make the chip break, surface finish, etc.
 
Brent H said:
Funny thing is that the lead screw rotates opposite to the feed screw. So when threading I need to switch the feed to reverse if I want the travel towards the chuck.
Click to expand...

That's interesting.... and the imp machine doesn't behave the same way?
 
YYCHM said:
Idler gear and bracket upside down some where?
Click to expand...

That was my first thought too. But missing is more likely. Then I added the @Brent H factor and said no way. He has already gone over her from head to toe......

Also, I just couldn't figure out how or where. So I've accepted in my minds eye that this is how she works. As all us guys know....... we were not meant to understand how "they" work. At some point or another we just have to accept them the way they are and enjoy them anyway..... ;)
 
Thank you guys! It runs very nicely!

On the lead screw rotation - no idea other than the conversion to metric must have reversed Miss Metric. I will have to be careful with tool insertion and make sure she is running in the right direction. Of course lube will always play a factor. Speaking of which, I over filled the head and will have to drain some off before we get into the rough stuff.

The lads were into the keg yesterday and good ol’ tequila joined the party. Lots of sleep today - anyone heard of a weighted blanket? Those things are nasty, pin you to the bed and zzzzzzzzz
 
Brent H said:
Thank you guys! It runs very nicely!

On the lead screw rotation - no idea other than the conversion to metric must have reversed Miss Metric. I will have to be careful with tool insertion and make sure she is running in the right direction. Of course lube will always play a factor. Speaking of which, I over filled the head and will have to drain some off before we get into the rough stuff.

The lads were into the keg yesterday and good ol’ tequila joined the party. Lots of sleep today - anyone heard of a weighted blanket? Those things are nasty, pin you to the bed and zzzzzzzzz
Click to expand...

LOL i was wondering why i got the same 3 texts 50 times last night!

I just got a weighted blanket...definatley good for oversleeping....you don't want to move because you can't
 
Great job on Miss Metric @Brent H !
Of course, as we have come to expect from you! :D
I even showed management and she gave you a thumbs up on the workmaship (but I think more on the coordination of machinery colours in your shop..;))
 
Last edited:
ShawnR said:
Great job on Miss Metric @Brent H !
Of course, as we have come to expect from you! :D
I even showed management and she gave you a thumbs up on the workmaship (but I think more on the coordination of machinery colours in your shop..;))
Click to expand...

I'm not showing my management any of that.....

The very first thing out of her mouth will be something like.... "Why doesn't your shop look like that?" The comment will include both visual and sensory snarls and hisses.

If I let her into my shop too often, she starts measuring for curtains, carpet, oil paintings, and chandeliers. So I keep her visits to a minimum.

I have no idea why big gnarly machines don't get her all excited. Next time she starts measuring my shop I'm gunna take her for a drive through Manitoba.
 
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