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How do I troubleshoot a Walthers 130' turntable?

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  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Thursday, March 9, 2023 7:35 AM

It is a point on the turntable that is used to reference the exact location of the stop settings chosen by the user for roundhouse tracks, storage tracks, etc.

On the older, non-DCC model, it is referred to as the "zero point".

Rich

Alton Junction

  • Member since
    July 2009
  • From: lavale, md
  • 4,678 posts
Posted by gregc on Thursday, March 9, 2023 7:27 AM

what is "To Home Sensor" referring to in the 2859 instructions?

greg - Philadelphia & Reading / Reading

  • Member since
    September 2004
  • From: Dearborn Station
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Posted by richhotrain on Thursday, March 9, 2023 7:13 AM

Ok, so you have the newer DCC model. Mine is 933-2829, the original non-DCC model. 

Both models rely on resetting a "home" position as the starting point for programming the stop positions.

I have experienced from time to time a failure to find the home position, yet I could program stop positions. But, if you have to reprogram the stop positions after powering down and then powering up again, something is amiss with the control box.

Let us know what Walthers has to say. They may or may not be helpful. 

Rich

Alton Junction

  • Member since
    April 2002
  • From: Frankfort, Indiana
  • 424 posts
Posted by Morpar on Thursday, March 9, 2023 6:24 AM

The part number on my turntable is 933-2859. The only plug I have seen on the whole unit is on the bottom to input control power for the turntable and track control power and it is a polarized 4-pin plug. The input voltage is supposed to be 16 to 24 volts DC, so I am powering from my PLC system 24 volt power supply. 

Good Luck, Morpar

  • Member since
    September 2004
  • From: Dearborn Station
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Posted by richhotrain on Thursday, March 9, 2023 5:29 AM

gregc
Morpar
After going through the manual and trying the procedure to set home position twice it still won't find home.

 

On the original Walthers turntable (933-2829), the turntable was programmed by first finding the "zero point" and setting that point as the starting point for selecting stops around the turntable.

Rich

Alton Junction

  • Member since
    July 2009
  • From: lavale, md
  • 4,678 posts
Posted by gregc on Thursday, March 9, 2023 5:03 AM

Morpar
After going through the manual and trying the procedure to set home position twice it still won't find home.

am i reading the instruction correct, that there is a separate connector to the "Home sensor"?   could that be plugged in backwards?

greg - Philadelphia & Reading / Reading

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Wednesday, March 8, 2023 9:09 PM

Which turntable is it?

What is the Walthers Item Number?

It begins with a 9.

Rich

Alton Junction

  • Member since
    April 2002
  • From: Frankfort, Indiana
  • 424 posts
How do I troubleshoot a Walthers 130' turntable?
Posted by Morpar on Wednesday, March 8, 2023 8:23 PM

I had a pretty good day working on the layout, but ran into a problem. I finally got the Walthers 130' turntable pit installed and the control wiring hooked up. I put the turntable in the pit, pressed buttons, and it moved! I started off with the error for the turntable home position needing set which wasn't surprising. After going through the manual and trying the procedure to set home position twice it still won't find home. I am guessing the emitter is on the table and the receiver is on the pit, but how do I check which side (or sides) aren't working right? Neither the emitter or receiver are covered, and the pit and table have both been in the box unless test fitting on the layout. Since it's after business hours I thought I would ask here before trying to call Walthers in the morning. Other than the fact the table doesn't know where it is in relation to the pit, everything else seems to work fine. I set up a couple of stop points using pencil marks and the table came back each time. Obviously that won't happen tomorrow since the table is back in the box, but the new stop points should be in the same relationship to the factory set points as they were today.

Good Luck, Morpar

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