12GS - VSS or tapping ABS?

Discussion in 'GS Boxers' started by bonox, Oct 23, 2006.

  1. AntonLargiader

    AntonLargiader Long timer

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    The GS sensor is probably around 80k per mile. Not even close!!
    #61
  2. daGeeeze

    daGeeeze Geeezed lightning

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    What about the possibility of just eliminating the BMW throttle grip assembly and buy something designed for a "pure" dirt bike and butting it up against the switchgear on the right grip? I've seen some pretty compact ones but never looked really closely. Definitely though they were double cable.

    As a side note there are some cables made for push/pull work but they're heavy thick and expensive. Doubt they'd make for a good solution. I've never had a return ability in my cars and trucks so I wouldn't worry too much about that part.
    #62
  3. Crilly

    Crilly Been here awhile

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    :norton The reason I asked about it turning off going down hill is because some of the new bikes turn off the ignition when the throttle is closed. But by the poping of the GS i guess they do not. My Buell and V-rod would shut the cruse control off. Thats is why I went with the proxcimity switch.
    #63
  4. rprade

    rprade Adventurer

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    I know I am late on this thread, but I m working on a cruise control for my K1200S and will be on my soon delivered R1200GSA. I chose the Rostra electronic cruise control to avoid the need for a vacuum accumulator for a vacuum actuator. The K1200S and the R1200GS have a connector near the front of the bike for connection to the GPS accessory. This connector has three wires:

    Brown = ground (pin 1)
    Blue/Green = TAA (pin 2)
    Red/White = switched power (pin 3)

    I will be hanging a scope off of the TAA lead next weekend, but I am fairly sure it is a conditioned speed pulse from the ZFE (chassis control module). This would be used by a GPS employing dead reckoning, not currently used by BMW. The Rostra unit also looks at an engine tach pulse and disengages the cruise control in the event of throttle runaway.

    The Rostra has all of the electronics and a throttle servo in one module and can be purchased for about $200. Here is a link to Rostra controls website.
    #64
  5. johnjen

    johnjen I've Been Resigned

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    This thread has HoW written all over it...

    JJ
    #65
  6. AntonLargiader

    AntonLargiader Long timer

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    Yes indeed, TAA is a conditioned speed signal. I hadn't realized it was there on the earlier Hexheads but it is. The GS should have it as well.
    #66
  7. daGeeeze

    daGeeeze Geeezed lightning

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    Great news. Plus I also have that unit already; just no time to install it or expiriment with it. Any plans on cable handling?

    Thanks and keep us posted please!
    #67
  8. rprade

    rprade Adventurer

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    My GS won't be here until the end of the month, but I am starting on the K1200S this weekend. That will allow me to resolve some of the issues such as interfacing the brake (and clutch, if possible), power, tach pulse, and control switching. Hopefully resolving those issues will make the install on the GS a little easier.

    For cable handling, I am going to look at parts data tomorrow and see what can be done to turn the GS throttle cable splitter into one like the RT uses. I am hopeful that the parts can be ordered to convert the GS splitter. I will not try to add the second cable back up to the throttle grip, but would like to interface the cruise servo to the cable splitter in the same fashion as on the RT.
    #68
  9. bonox

    bonox Tryin Hard

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    :deal
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  10. lemonhart

    lemonhart Adventurer

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    I am in the middle of installing a AudioVox ccs 100 and and was wondering.
    Did anyone ever come up with a definitive answer as to whether this does in fact work as a VSS signal for the cruise control?
    Also if it works does that mean you don't need to tap into the coil and if you still do where is the best place to do it?
    TIA

    #70
  11. Poolside

    Poolside Syndicated

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    <BR>
    ...

    It looks like the VR sensor is too 'fast' for the Audiovox. Go for seeing about using the TAA signal.

    <BR>
    #71
  12. kpavey

    kpavey K12Sman

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    So did you manage to get the VSS to work with the cruise kit? Has anyone measured the VSS signal, and can characterise it? Square wave, 5V, analogue, with variable pulse width wrt speed?
    #72
  13. Poolside

    Poolside Syndicated

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    <BR>
    This is a guess, but it isn't a wild guess. The TAA signal is probably a digital signal, with a variable frequency wrt speed.

    In the case of the BMW motos, it is a 'manufactured' signal based on a the sinusoidal signal from Variable Reluctance wheel speed sensor.

    Some automobiles use the term VSS to describe the signal from the pickup on the transmission output shaft.


    With a couple of different checks with a good digital meter you can probably get a good enough 'picture' of the signal to know if it will work with the cruise control.

    <BR>
    #73
  14. dede

    dede Lefty

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    With a couple of different checks with a good digital meter you can probably get a good enough 'picture' of the signal to know if it will work with the cruise control.

    <BR>[/QUOTE]

    Poolside; Please describe in layman's terms the tests you refure to here, I have the unit hooked up and passing the testing cycle but don't know how to check the pulse count. I am using the three prong plug under the beak on a 2009 GS as described in a nearlier post with a Rostra CC. I need the pulse count to set the dip switches to the proper range. The only reading I get with a digital meter set to VDC is 12V.
    #74
  15. Poolside

    Poolside Syndicated

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    We'll give it a try.

    First, I have no idea what "passing the testing cycle" might mean.

    What does the meter read on VAC with the wheel spinning?

    Most digital meters have a frequency counter, does your meter have one?

    <BR>
    #75
  16. dede

    dede Lefty

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    thanks for responding

    Passing the test cycle for a Rostra unit means putting it into test mode and when you push the resume/acc button a diode lights in the unit as does the coast/decel button, then when you spin the wheel by hand the light will begin to flash to indicate it is picking up the signal from the VSS but it only flashes and does not change with wheel speed.


    My meter is a Triplett 9010 and I asume you mean set to Volts AC (on mine it is ACV), again I'm no electrical engineer. When hooked to the bike it reads .017 volts in first gear just above idle.

    I don't know what a frequency counter is.

    Oh ya, I had the red lead on the meter hooked to the ZEF speed out put and the black to the battery ground terminal.
    #76
  17. Poolside

    Poolside Syndicated

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    <BR>What's the ZEF?


    <BR>
    #77
  18. dede

    dede Lefty

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    #78
  19. Poolside

    Poolside Syndicated

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    I wasn't able to find "Triplett 9010" data. Not to beg off but if you don't know what a frequency counter is, and if there isn't an AC content to the speed signal, or the signal isn't measurable by the means in use, then it looks like it's a bridge too far to do this over the internet. Sorry. Good luck getting it sorted with some local help.

    <BR>
    #79
  20. Crilly

    Crilly Been here awhile

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    I use one of these.

    SCHNEIDER ELECTRIC Prox Sensor, 8mm, NPN, NO, Rge 1.5mm, M12
    Electrical > Switches > Proximity Sensors and Switches
    Proximity Sensor, Cylindrical, Inductive, Dia 8 mm, Length 2.4 In, Width 0.31 In, Depth 0.31 In, Volts Type DC, Voltage Range 12-24, Circuit Type NPN, Detecting Distance 1.5 mm, Shielded, Temp Range -13 to 158 F, Max Load 50 mA, Case Nickel Plated Brass, NEMA Type 4X, Connector Type M12, Standards UL, CE, RoHS, CSA
    Grainger Item # 1EVJ4
    Price (ea.) $86.30
    Brand SCHNEIDER ELECTRIC

    It is a proximity sensor from WW Grainger. 12 VDC NPN 3 wire.

    I mount it so it senses the bolts on the rear brake rotor. Works great. I use 6000 pulses per mile.

    I just order the other wheel, cover and spring from the RT Splitter box. I also drill out the splitter box for the curse cable.

    Good luck
    #80