Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: David Billington <djb@invalid.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: rod-mill project - "mains" electric motor advice
Date: Wed, 18 Jun 2025 19:25:57 +0100
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On 18/06/2025 09:54, Richard Smith wrote:
> For what it's worth...
> Compilation of recent events
> 3 videos and a photo.
> I've mentioned all but most recent video already here, if recall
> rightly.
>
> http://weldsmith.co.uk/tech/minerals/250615_3vids_pics/250615_vids_pics.html
> "Mine and mineral recent videos and pictures"
>
> It's our local scene here in West Cornwall - interest in geology, mining
> and minerals.
> All are joint endeavours
> Projects have been going from strength to strength.
>
> Most recent is separating galena - lead ore - on a shaking table.
> "My" rod-mill project and the rod-mill working was a necessary link in
> the chain.
> I've been asked if the rod-mill is portable - ie. can it be slung in a
> car and taken to where there's some minerals actions?  That is how far
> it's gone.
> The answer is yes just about - but nowhere near as much as I'd like it
> to be portable.  The design where the shell rolls as it will on four
> wheels, two driven - enables the cylindrical shell to be put in the
> passenger footwell, where it stays put hemmed-in by the small space and
> balancing the car, while the frame with motor should go in the back -
> maybe everything else out of the boot (truck) onto the passenger rear seats
> and the frame with motor in the boot so it is restrained during travel.
> Else fold-down the rear passenger seats and in it all goes.
> Obviously - that the mill runs on domestic "mains" easily, within a
> fraction of what our "mains" can supply (always 3kW at any socket)
> and could be on the end of a 10's of metres extension lead totally
> helps.
>
> The one about about the inverter VFD (Variable Frequency Drive) drawing
> 1ph output variable-speed driving a 3ph motor is "the biggie" I had no
> inkling of at the outset - as a readily achievable solution.
>
> Best wishes,
> Rich S
>
>
>
>
Richard,

     Your mill looks quite portable as is. Many times I've taken my 
folding engine crane in the car to pick heavy items up or to load them 
into the estate car and then loaded the crane along side so it could be 
used to remove the item later. I've moved various engines, welders, a 
floor standing bandsaw.