Maker
Most folk just call me; Orange Joe
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Doesn't that need a huge external resistor?DC braking
Doesn't that need a huge external resistor?DC braking
Yep, definitely only threeHave you definitely only got 3 wires going from the terminal block into the body of the motor?
If you have then you need to strip the motor down.
Did you get anywhere with breaking the existing motor down?The bolt holes in the motor mounting plate are arrange as a 3" X 5&⅞" rectangle, does that sound like a common size that a new motor will fit?
Is the pulley steel or aluminium? 19mm is slightly smaller than 3/4" so you would need to shim the pulley bore to get the shaft to fit, and because its a very small gap its a pain to find a shim thin enough to do it.Would you say an Invertek is worth the extra money, especially as it's not coming from china?
1 year warranty with the Invertek.
I've been looking at motors too. I'm quite certain I'm gonna be making an adaptor plate to fit the new motor to the old holes. The pulley is where I'm having trouble - I'm fairly sure the shaft is ¾"ø * but all the new motors I'm looking at have either 19 mm ø or 24 mm ø shafts. 19 mm is only a couple of thousandths under three quarters, will this make any effect and what can I do to remedy it? The motor I'm looking at is a TEC, are these decent? The other one I've seen is a Marelli but it has a 24 mm ø shaft so either the shaft would need lathing or the pulley would need drilling, two things I'd rather not do.
*I got a couple of bearing/pulley pullers for Christmas so I'll take the pulley off soon and measure the shaft properly.
I just knew someone was gonna say thatIf you bought the lathe first as recommended originally you could machine the pulley and adaptor plate for a new motor in no time, props for mot only being interested bht buying a mill at your age though
Ah, I like the idea of going to a motor rewinders and getting them to do it, I'll find out if there's a local one and see what they charge.A good start to understanding motors is the book
http://www.teepublishing.co.uk/book...eries/electric-motors-in-the-home-workshop-1/
If you can dig out the star point and get it converted to delta, do you have any way of testing it before you connect it to your new £300 vfd?
Once you have the motor in delta the switch gear is probably 415v as well, the book give you some ideas on modifying the contactors ( you unwind the coil on the contactor and it'll hold on 240)
Do you have a local rewinder you can go to and see if they will convert the motor or have an alternative?
Me ? I bought a rotary from Boost, it's loud (ish ) and gets on my nerves I wired it to a remote socket and a contactor so I can push the button run the machines and then switch off the rotary with the remote.
It's going in the shed next to the garage this year.
But the advantage is that its a 5 hp convertor that give me 415 3 ph I ran that into a 3ph board I got off a job and then run 3 phase sockets where I need them now when I get a new machine its plug and play.
Lee
ps
http://www.ebay.co.uk/itm/Single-ph...ial_Automation_Control_ET&hash=item3a9ebf1853
The pulley is aluminium.Is the pulley steel or aluminium? 19mm is slightly smaller than 3/4" so you would need to shim the pulley bore to get the shaft to fit, and because its a very small gap its a pain to find a shim thin enough to do it.
A better option would be to bore the pulley oversize and then use a bush to fit the shaft to the bore.
I still think your best option is to split the existing motor and separate out the star.