Forward/off/reverse switching of older YL-motor

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  #1  
Old 07-16-19, 01:44 AM
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Forward/off/reverse switching of older YL-motor

Hi there.

I purchased and older metal lathe/mill which I would like to wire to a switch so that the switch controls Forward/Off/Reverse on the motor.. This should be the default looking at the manual, but when looking at the cabling it's obvious that the original cabling has been changed at some previous time. But I believe the motor and the switch is the original.

The motor is an ac 220V 1 phase motor, YL-8014. The lathe is called hq400 and is of chines origin made on license of german company Güde.

I've attached pictures of the motor plate, motor cable mount, the switch and the electrical diagram from the instruction manual.

When looking at the motor plate it seem to me that the two diagrams there shows wiring for forward and backward in a no switch scenario. But the manual seems to show a wiring where the switch changes the direction.

I'm not sure how I should wire the motor at the motor cable mount and at the switch.

Do you guys have any ideas on how i should move on?

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Last edited by PJmax; 07-16-19 at 08:23 PM. Reason: cropped/resized pictures
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  #2  
Old 07-16-19, 01:48 AM
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by the way, i'v read this thread already but without completely understanding how should wire my stuff up: https://www.doityourself.com/forum/e...se-switch.html
 
  #3  
Old 07-16-19, 04:52 AM
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That switch is an on/off switch. You need a drum switch to get forward and reverse.
Here is one example. There are many brands.

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  #4  
Old 07-16-19, 07:12 AM
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Note that that is a 50Hz motor. You did not specify your location, but if you're in the US, that motor will not work properly.
Andy
 
  #5  
Old 07-16-19, 07:31 AM
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I'm in Europe so all is fine with the 50hz, thank you.

So, you are saying I cant use that switch for this? :-/
 
  #6  
Old 07-16-19, 07:38 AM
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So, you are saying I cant use that switch for this? :-/
Correct. That is a simple on off switch. It won't work for changing direction.
 
  #7  
Old 07-16-19, 07:41 AM
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ok, but I'm not sure if I confused you all, but the switchI want to wire up is the white lower one with markings I 0 II, three positions and six terminals. It's separate from the red and green buttons. that cant be used?
 
  #8  
Old 07-16-19, 03:56 PM
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Welcome to the forums.

That switch..... with the six terminals.... is it a standard double pole double throw center off and the center terminals are the commons ?

You cannot fully disconnect power to the motor with that switch.
You need at least three poles to completely remove power from the motor.
 
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Old 07-16-19, 08:27 PM
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I had time to redo the pictures and look over the thread again.

That switch will not work for this application. If you look at the wiring diagram..... you'll see winding V1/V2. This is the start winding. It gets powered in one direction for forward and the opposite for reverse. U1/U2 is the main winding that just gets powered up in either direction. So like Joed pointed out in post #3..... you will need a four pole drum switch to make that motor reversible.
 
  #10  
Old 07-22-19, 06:10 AM
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Thank alot PJmax. I understand that my switch is not usable, but I'm unsure of some other things now...

The diagram shows a 6 terminal switch, yet post #3 by Joel suggest a 8 terminal switch. Shouldn't be a 6 terminal switch?
You suggest a 4-pole switch.Other places I'v read that a 3pole will work. Can you explain the difference?

Should this 3-terminal one work: https://ebay.us/7oYzgT
 
  #11  
Old 07-22-19, 07:26 AM
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Actually upon further review I think your switch could work. The bottom switch switches between for/rev. The upper switch turns on off. The drawing is right there in your second image.
Bottom switch is the X with the L and R. to change direction.

U1 and U2 on 1 and 4
V1 and V2 on 3 and 6
cross connect 2 and6
cross connect 5 and 3
 
  #12  
Old 07-22-19, 11:35 PM
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The problem is you can't just change the direction switch. You have to shut down all the windings and then restart the motor. There looks to be a contactor shown in that diagram.

Yes..... that drum switch will work.
I was thinking 230/240v with two hot wires like our wiring here but you have one high voltage wire and neutral so you only need three poles.
 
  #13  
Old 07-23-19, 02:57 PM
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No matter if I take the approaches suggested in #12 and #13 - what will the wiring be in the motor itself? The diagrams for forward and reverse on image #1 surely shows the short between z1 and v2 should be permanent as it is used for both forward and reverse. the v1, v2, u1 and u2 goes to switch. But what to do with z2?
 
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