Namco Pots - replacement cross reference

[rmwilson]

Looking for any hep and advice I can get, I need to replace my Namco Potentiometers. (One failed before I could actually test it or know what it is) - its for steering - ( It came out of a Namco Gp 500 (motorcycle arcade)

1. Can any one identify this or a replacement for it? (stamped on the back E1K (OHM symbol) 60 (then next line) 8L - Note the E1 -= might be EI or EL - its just a straight line)
2. If it is a 60 degree pot what happens if i don't replace with a 60degree? 3
3. I was always under the impression they were 5k (is it possible to be a 1k, Can I stick a 5k or 10k into it?
4. blob:https://web.whatsapp.com/122cc473-9b3f-403f-8503-95b21cb9340e 
5. Original manual part number was X008-023, X00800-023

Thanks,

Ryan

[buttersoft]

I don't know precisely which pot it is, but to answer:

It's probably 1k 60 degrees. i would also presume it's linear, but not sure about the marking there.

Whether you can use a 5k or 10k pot might depend on the calibration options within the game service menu. If there is a complete recalibration that starts from zero, with the pot and the wheel centered, then you would simply calibrate as far as the wheel turns in each direction.

That said, matching the original might be easiest.

[PL1]

Not sure if this is an exact match, but it is a 1kOhm 60 degree pot used in Namco machines.   

https://arcadefixit.com/product/namco/ridge-racer-2/1k-ohm-pot-part-vg75-03824-00/


Scott

[rmwilson]

Thanks guys for the help and thoughts...
my only concern of switching the 1k to a 5k or 10 is if it will affect any voltage or other circuitry in the game ...

I get what we are saying that it will configure to the max range used I'll have to play with it ...

Thanks guys

Ryan

[PL1]

my only concern of switching the 1k to a 5k or 10 is if it will affect any voltage or other circuitry in the game ...

If the pot is a typical 3-wire setup, it is acting as a voltage divider.
- Operating voltage (usually 5v) and ground will be on the outer tabs 1 and 3.
- The pot output voltage will be on the center tab 2.

The difference between 1/5/10k pots is how much current they will draw.
- You can calculate this using Ohm's Law -- Voltage = Current * Resistance
- Equation rearranged to solve for current -- Voltage / Resistance = Current
- 1k draws 5mA -- 5v / 1kohm = 5mA
- 5k draws 1mA -- 5v / 5kohm = 1mA
- 10k draws 0.5mA -- 5v / 10kohm = 0.5mA

That's not a huge difference for typical electronic circuits, so as long as the Analog to Digital Converter circuit can operate with the lower current level, a 5k or 10k pot will be OK.   

The greater concern when swapping pots is the difference in the range of voltages from a linear 60 degree pot compared to a linear 270 degree pot, for example.
- 60 degrees of motion on a 60 degree pot gives a full 5v range.
- 60 degrees of motion on a 270 degree pot gives a much more limited 1.11v range.  60/270 * 5v = 1.11v


Scott