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  #1  
Old 05-18-2022, 08:41 PM
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Default HES Lathe

Short for H. Ernault-Somua company, made in France
Type 550,
Numero (serial # ?) 10799
Date de sortie 28369

20” swing, 94” overall bed length about 64” between centers, if I had a center for headstock.

Lathe was wired for 440 3 phase in prior shop. I did get to hear it run before cutting power to it and loading it on my truck to haul 3 hours home.

Motor did make some bearing noise, and only other issue was the thread feed screw was not operating. Renegotiated $500 off for this reason, praying I could fix it somehow.

After looking at it one night, I figured out there was a small shear drive pin that was sheared. They had a cotter key stuck in it, which probably was nowhere near strong enough. At the moment I have an 1/8” center drill in it. Best I could come up with to test it before tearing into the feed box.

Having some difficulties figuring out the wiring of the motor for 220.

Motor is a brevets leroy/ 12 hp type NVA142 N2 no 1113,

There is a oil soaked electric blueprint in the electrical cabinet, that I found a diagram of wiring for 220/ 440, but the numbers combinations did not coincide with how the main motor was wired.

Hopefully the diagrams I drew out make some sense to someone.

What is confusing me, is there are 11 wires coming out of the motor windings. Two are going to wires labeled 1 &2 back to the electrical panel up to one of the magnetic switches. I think these are an overheating kill switch if the motor gets too hot.

The other ones are labeled V, VV, W, 4,5,6,7,8,9.

My other motors have wires labeled 1-9. So how do I assign V, VV, W? I tried to copy the diagram from a balder motor I had, substituting 1,2,3 for the V,VV, W, but the motor would not fully start. It turned, but was fighting itself it seemed, til it tripped my red neck setup breaker switches.

Part of me almost want to just buy a big VFD to run it, but I hesitate for the reworking of existing on off switches.

I did download a manual of sorts, but it is in French. I need to spend more time going thru it with my phone translator.

If anyone has any other ideas/ suggestions on where to find the info I need, I’m all ears. Click image for larger version

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Old 05-18-2022, 08:58 PM
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Does you local high school or college teach french. Maybe you know one of the students who can interpret for you.
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Old 05-18-2022, 09:46 PM
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I found some stuff on figuring out leads on the motor.

https://youtu.be/DlbB8fyCiRA here is a youtube, this is a Y connected motor, look for the delta video and see what you have. Since you have some numbers labeled this may help. The attachmet goes with the video.

https://electronics.stackexchange.co...a-9-lead-motor

https://electronics.stackexchange.co...termine-the-co

I would make sure the 2 leads are for a temperature sensor. if you have 11 wires.

I have never tried this method but I am going to.

This should get your 9 leads marked correctly then you can connect your motor properly for low voltage 220 3 phase.

Need to figure out the leads correctly, the VFD would not run it if leads are not connected properly in the motor.

Scott
Attached Files
File Type: pdf 9_lead_connection_sheet.pdf (1.06 MB, 51 views)
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  #4  
Old 05-19-2022, 09:17 AM
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Default HES Lathe

Thanks Scott. The video and PDF makes it look easy. This will help me figure it out.

Good thing I still have an analog meter or two still around.

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Old 05-20-2022, 08:37 PM
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Quote:
Originally Posted by toprecycler View Post
After looking at it one night, I figured out there was a small shear drive pin that was sheared. They had a cotter key stuck in it, which probably was nowhere near strong enough. At the moment I have an 1/8” center drill in it. Best I could come up with to test it before tearing into the feed box.
My bet is it is a taper pin.
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Old 05-20-2022, 08:53 PM
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For those with a digital multimeter and a doorbell transformer. And a 9 lead motor you need to identify the leads on.

https://youtu.be/J2GL9zfz91Q

This method uses VAC ( Volts AC) most door bell transformers are 24 or so.

Scott

This is for a Wye connected motor, if you have a delta connection check his video for that.
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  #7  
Old 05-21-2022, 11:08 AM
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Better put a shear pin back in the lead screw or you will regret it..
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Old 05-21-2022, 11:09 AM
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I watched the videos more than a few times. This does not necessarily mean I know what I am doing.

However I may be making more out of this than needs be.

you have this V, VV, W, 4,5,6,7,8,9.

Using an ohm meter, find continuity with the coils you need to find out which letter goes with which number. I would open all the connections you have and put one meter lead on #4 and see which letter has continuity, that would be #1
put the meter lead on number 5 and find continuity on the letter and this should be #2. and #6 to a letter should be #3.

Then wire to low voltage connections and it should work.

You should be good to go with this.

Scott
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  #9  
Old 05-21-2022, 02:21 PM
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In a previous post in another thread I mentioned my motor stuttering to start at times. Well I figured that out today... I will post in bold to remind myself so I will remember.

Do not use the generated leg of your rotary phase converter to feed your control transformer!!

Scott
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