Schaublin 70

[steamer]

The dividing line between residential and commercial around here can sometimes be a little blurred.....and if you pay to run the line you can get it.....but it's very pricey....not impossible, but unlikely.

I use a 110 1PH to 220 3Ph VFD on my 9" SB and its great!....and my F1, which is 380 3Ph, has its own rotary phase converter.

Dave

[steam guy willy]

Hi Also wondering about the mains frequency in The USA is it  50 or 60 Hertz   Cycles /second. ?? I thought that the US mains was 120 Volts  still wondering .....!!!


Willy

[steamer]

Hi Also wondering about the mains frequency in The USA is it  50 or 60 Hertz   Cycles /second. ?? I thought that the US mains was 120 Volts  still wondering .....!!!


Willy

120V 60Hz  1 Ph    AND   220V 60Hz 1 Ph is the standard in 99+% of the homes here   ( and then there's the weirdo's with home shops...... )

[crueby]

Back at w*rk about 15 years ago one of the electricians somewhere in the building did something wrong, and we suddenly had (near as we can tell) 220v coming out the 120v wall sockets in our office area (this was in a giant manufacturing complex). Set the power supply on my computer on fire, guy next to me had a desk lamp that could have been used to spot airplanes (briefly).    Whoops!  We had temporary cables run in from down the hall the rest of the week while they rewired things...

[GWRdriver]

The story behind this is fairly complex (and possibly boring), but I've owned a Harrison lathe for some time, which I was able to acquire only because it was 50Hz rather than 60.  It's been running very happily on 60Hz for quite a few years.  The difference in Hz is supposed to affect the spindle speed, making it run faster, or slower, I can't remember which.

[gadabout]

Thanks for all the advice! Can it be run from a VFD ? I don’t have 3 phase at home. Certainly wouldn’t want to change the motor out to one that can run from a VFD.
Thanks
Mark

[steamer]

VFD's do a very good job of creating 3PH.   It should be fine provided you size the VFD appropriately.  Even if you just use the VFD as a 3PH generator and never change the frequency!

Dave

[internal_fire]

Thanks for all the advice! Can it be run from a VFD ? I don’t have 3 phase at home. Certainly wouldn’t want to change the motor out to one that can run from a VFD.
Thanks
Mark

There are lots of considerations if you are looking for maximum power and maximum efficiency. If you can deal with less than perfect then most motors will run on different frequencies, such as the range of frequencies produced by a VFD, or a simple conversion between 50 Hz and 60 Hz. It is important avoid overloading, of course.

I would guess that this lathe does not have a huge motor. A possibility is simply replacing the motor with one that matches your existing power feed. Considering the value of this lathe a couple hundred for a new motor is almost in the noise. Probably less expensive than a new VFD.

Gene

[steamer]

Thanks for all the advice! Can it be run from a VFD ? I don’t have 3 phase at home. Certainly wouldn’t want to change the motor out to one that can run from a VFD.
Thanks
Mark

There are lots of considerations if you are looking for maximum power and maximum efficiency. If you can deal with less than perfect then most motors will run on different frequencies, such as the range of frequencies produced by a VFD, or a simple conversion between 50 Hz and 60 Hz. It is important avoid overloading, of course.

I would guess that this lathe does not have a huge motor. A possibility is simply replacing the motor with one that matches your existing power feed. Considering the value of this lathe a couple hundred for a new motor is almost in the noise. Probably less expensive than a new VFD.

Gene

That will depend.  Some of the Schaublin's had specialty motor frames that housed a belt tensioner.    If so it would not be so easy.    but....the short answer is a VFD works wonders on a lathe if it's sized correctly   I have a 3/4 HP motor with a 1.5 HP VFD  (if memory serves me right) and it's more than up to the task for my 9" Southbend...even when I push it...

Dave

[steamer]

Some don't come with a motor, and others  ( later I presume)_ came with one of these

http://www.lathes.co.uk/schaublin65&70/

Dave

[gadabout]

Thanks , I was thinking more along the star delta line as some need this changing to run a VFD ??

[Jo]

Have you got it home yet.

Worry about getting it running after you have secured it.

Jo

[Jo]

Schaublin motors: These are glorious wonderfully balanced jewels. It is a two speed motor = two windings. 750 rpm/3000 rpm = 0.4 and 0.9 HP. If I didn't have a rotary transformer converter I would keep the original motor and swop it for a VFD  compatible single speed motor. 

The motor mounts on a platform with 4 bolts and all you will need to do is bush the spindle to match the pully. Then you can use the VFD to drive the belt/clutch assembly but please use the foot controls not the VFD

Jo

[gadabout]

No, I haven’t bought it, still weighing up if I really need it 😁 am away for another week so can’t do anything now anyway
Mark

[Jo]

In which case it sounds like you should let someone else have it who would really appreciate it and its capabilities 

Jo