rec.autos.simulators

by **Ed Whit** » Fri, 29 Nov 2002 08:06:36

Well, it was only a matter of time, but I need to replace the throttle pot
on my MOMO, it started acting up, so it got
pulled/opened/cleaned/lubed/re-assembled/-re-installed, and it seems to be
working fine now, but there was evidence of wear at the points that the
metal fingers sweep on the surface that the wires are connected to. The pots
say 10-30K on the case, have 3 wires attached, and the shaft is half cutaway
where it enters the pedal itself. Has anyone had any success finding a
replacement yet? It appears that the throttle and brake are the same pot, I
asked over on the Wingman board if they were available from Logitech, I was
told that they are not, and was also told that the new optical pots from the
new version MOMO would not be a direct replacement either. Wheel is working
fine for now, but the clock is ticking.....Any ideas out there?
Ed

by **Tom Osbo** » Fri, 29 Nov 2002 09:51:47

Look on the cover and see if there is a part number or Mfg listed, do a
search on net. Try Digi-key

by **Ed Whit** » Fri, 29 Nov 2002 10:05:17

Thanks for the tip, Tom........
Ed

by **Tom Osbo** » Fri, 29 Nov 2002 10:40:51

If you have a number you can't find, shoot me an email and i will try and
help, I have lots of electronics catalogs.

> > Look on the cover and see if there is a part number or Mfg listed, do a
> > search on net. Try Digi-key
> Thanks for the tip, Tom........
> Ed

by **Marc Collin** » Fri, 29 Nov 2002 12:53:38

As far as I know, only the steering "pot" is optical on the new MOMO. Don't
know if the pedal pots are interchangeable, though. What does Logi suggest
you do--throw out the wheel?

Marc

by **GTX_SlotCa** » Fri, 29 Nov 2002 14:52:23

No. If the wheel is out of warranty they suggest you pack it up and ship it
to them. Then for about $150 they'll send you another one (refurbished?).
They know that nobody in his right mind would ever do this, so I guess they
expect you to throw it out. But, they never actually suggest that you do
that.
They don't carry parts (it's a sales center and the parts are in China, I
think). The customer service rep I talked to said that consumers don't have
the training to be able to replace parts and could damage the wheel. Of
course, it's already broken, but I guess he meant they'd break it more.

--
Slot

Tweaks & Reviews
www.slottweak.com

"Marc Collins" wrote

by **Jone Tytlandsvi** » Fri, 29 Nov 2002 20:15:32

10-30K seems a strange way to mark the potmeter but I guess they are 30k. I
measured mine to be 20k I think (or was that my MS pedals?). The pots
resistance is however not important as it acts as a voltage divider, but it
has to be a linear pot not a logarithmic. Besides it looks like these pots
has a rotation of something like 90 degrees, not 300 like normal pots. I
browsed through two electronics catalogs but was unable to find any pots
with rotation below 250 degrees. If you have the pedals opened, could you
take out one of the pot's to see how far it rotates?

I've read some of the other answers to your post, and if you have no success
finding pot's, you have a good excuse to get some high end pedals like BRD
or Redline. If you want a cheap solution that is actually better then the
momo pedals, get a non FF Microsoft Wheel, throw away the wheel and connect
the pedals to your momo with this adapter: http://tytlandsvik.no/momo/

Jone.

by **spar** » Fri, 29 Nov 2002 21:09:57

I'm not sure that the actual pot value is all that critical to Logitech
pedals. The old LWFF pedals used pots marked 10-30k (measured as 30k on
ohmeter). I used stock CH pedals with that wheel by just swapping the wiring
harness (used the LWFF harness on the CH pedals). The CH pedals use a 100k
pot and they worked fine. Next I made my own pedals using 100k pots from
radio shack. These also worked fine but I did have to fine tune the rotation
(by gearing/ geometry) to get a full linear response. Next I got a Momo
wheel. I never even tried it with the stock pedals. I swapped the Momo
harness with the LWFF harness on my pedals and it was good to go.

I think the calibration compensates for the differences in the pedals which
are low tech (no circuit board). The real question is where to get
replacements for the wheel pot. This tiny pot is made by CTS. there is a
good picture of what it looks like here:

http://www.tomshardware.com/consumer/02q2/020524/wheel-10.html

It has some numbers on it and measures 50k. Any info on this would be great.
With all the Momo wheels out there we'll be needing these someday.

Spark

by **Dave Coo** » Fri, 29 Nov 2002 21:37:25

I replaced my entire pedal setup with TSW2 pedals and used the wiring from the
Momo wheel to go to the TSW2 POT's. It works fine. They are 250k ohm.

- Dave

by **Ed Whit** » Fri, 29 Nov 2002 22:08:34

Jone, one of the things I noticed while I had the pedals apart, was that
Logi was only using a small part of the pots actual rotation.....they may
well have been 300 degree rotation, but as the shaft of the pot is inserted
directly into the pivot portion of the pedal, they're only using maybe 15-20
degrees worth of the available rotation. In replies below it's been
mentioned to replace the pedals, I've never really had a problem with the
pedals, compared to my old Thrustmasters the MOMO's are great.....and I'm
just cheap and persistent enough to fix these eventually, they're working
fine now......for a while.....then I'll be browsing the electronics catalogs
to find my replacement. Failing all that, if I HAVE to buy better pedals,
you're right, I have a good excuse!
Thanks, Ed

by **Jone Tytlandsvi** » Fri, 29 Nov 2002 22:35:31

http://www.ctscorp.com/electro/ffpots.htm

It looks like a Series 251 with a custom made housing. It may very well be
impossible to get with this housing, but it may be possible to remove the
cover with the "arm" from the old pot and glue it onto the new pot.
Do you have the numbers on it?

Jone.

by **spar** » Fri, 29 Nov 2002 23:19:38

There are 3 numbers on this pot plus the CTS marking.

The number in the upper left is 10, upper right 3A, lower left 18. The shaft
diam is 5mm, the housing is 10mm wide.

That's it for markings. The little bracket mount would be easy to rig.
Getting the actual pot is the challenge.

Thanks,
Spark

by **Jone Tytlandsvi** » Fri, 29 Nov 2002 23:34:07

Could it be this pot?

http://www.ctscorp.com/electro/295pot.htm

"Angle of Rotation
Total Rotation: 300 5
*Effective Rotation: 50 approximate
(typical joystick control use). Special are
available at extra cost."

Jone.

by **Schoone** » Sat, 30 Nov 2002 00:07:05

Looks very close to me other that the keyed shaft.

by **Schoone** » Sat, 30 Nov 2002 00:11:08

Actually now that I look at the datasheet that one is available with the
keyed shaft so it might be close.

> Looks very close to me other that the keyed shaft.

> > Could it be this pot?

> > http://www.ctscorp.com/electro/295pot.htm

> > "Angle of Rotation
> > Total Rotation: 300 5
> > *Effective Rotation: 50 approximate
> > (typical joystick control use). Special are
> > available at extra cost."

> > Jone.

rec.autos.simulators

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots

MOMO pots