grim_d
Unlikeable idiot.
- Messages
- 4,218
- Location
- Scotland - Ayrshire
Hi all,
My L5a has a 3 phase 1.5hp 1400rpm motor on it which I run from a 3 phase supply, I have 3 phase now but eventually I won't.
This motor gives a range of 8 spindle speeds from 34 - 750 rpm.
When new these machines were also offered with a 2 speed 3.5hp 2800rpm motor giving 16 spindle speeds up to 1500rpm without any change to the headstock, I would like to upgrade the motor to take advantage of the higher speeds.
I can't seem to find many 2 speed motors, they all appear to be very expensive or/and grossly over sized.
My options appear to be, knowing not enough about motors or vfds and Shaft sizes aside.
1. Get an old motor like this one , run on three phase as I am now and continue to have 8 speeds but at a higher rpm. (68-1500rpm) wouldn't be a problem losing the 8 low speeds I can't imagine though it would be nice to retain them.
Am I right in thinking a single voltage motor like this isn't suitable for vfd? Or am I talking rubbish as usual?
http://www.ebay.co.uk/itm/232064158881
2. Get a 3 phase motor like this one and (eventually) run it from a vfd which would give me all the speeds with the bonus of being able to run on single phase when the time comes.
http://www.ebay.co.uk/itm/332020959275
3. Get a single phase 4hp motor same type as above and use some sort of speed controller? (if that's possible?)
Thoughts?, opinions?, ridicule?, other options?
My L5a has a 3 phase 1.5hp 1400rpm motor on it which I run from a 3 phase supply, I have 3 phase now but eventually I won't.
This motor gives a range of 8 spindle speeds from 34 - 750 rpm.
When new these machines were also offered with a 2 speed 3.5hp 2800rpm motor giving 16 spindle speeds up to 1500rpm without any change to the headstock, I would like to upgrade the motor to take advantage of the higher speeds.
I can't seem to find many 2 speed motors, they all appear to be very expensive or/and grossly over sized.
My options appear to be, knowing not enough about motors or vfds and Shaft sizes aside.
1. Get an old motor like this one , run on three phase as I am now and continue to have 8 speeds but at a higher rpm. (68-1500rpm) wouldn't be a problem losing the 8 low speeds I can't imagine though it would be nice to retain them.
Am I right in thinking a single voltage motor like this isn't suitable for vfd? Or am I talking rubbish as usual?
http://www.ebay.co.uk/itm/232064158881
2. Get a 3 phase motor like this one and (eventually) run it from a vfd which would give me all the speeds with the bonus of being able to run on single phase when the time comes.
http://www.ebay.co.uk/itm/332020959275
3. Get a single phase 4hp motor same type as above and use some sort of speed controller? (if that's possible?)
Thoughts?, opinions?, ridicule?, other options?
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