| Author | Message | ||
| CoryDaneRTS Rating: N/A |
Sometimes I think I should have been an engineer, at least when I am working on this BUS! I am wanting to install a cruise control, and I have the kind that uses magnets on the drive shaft. The servo gets attached to the throttle or foot pedal to increase/decrease fuel (gas pedal). FIRST QUESTION, how many drive shaft turns to ONE WHEEL ROTATION???? (BACKGROUND) The RTS has an electronic pulse counting type unit. Input pulses are provided to the speedometer from a sensor mounted next to the left front wheel brake drum. NOW, it says that "Metal Bosses" on the brake drum cause the sensor to pulse which is in turn transmitted to the speedometer. As the wheel speed increases, the pulse frequency increases, causing the speed indication shown on the speedometer to increase. (MY THOUGHTS) At first I thought the metal Bosses were magnetic, but now I assume that the mass of metal from the bosses cause some type of surge which is counted as a pulse for the speedo meter. I am interested to see if the cruise control sensor can be attached in a simalar manner, to the left front brake drum. My original thought was to use the bosses, if they were magnetic, however, If the bosses are not magnetic, which the cruise cont requires, perhaps I may be able to attach some magnets for the cruise sensor to pick up. I read somewhere that an enterprising person used an electronic bicycle odometer and attached the magnet on the wheel and it worked fine, the odometer just didn't know how BIG the vehicle it was REALLY attached to. This seems to make a lot more sense than to run the wires back to the rear to a usually inaccessable spot. SECOND QUESTION What Say Ye? cd | ||
| TWODOGS (Twodogs)
Rating: N/A |
HAHAHAHAHA | ||
| Brian (Bigbusguy)
Rating: N/A |
FIRST QUESTION, how many drive shaft turns to ONE WHEEL ROTATION???? What is you axle ratio? it will be the same. I think it may be easer to run some wires if the kit you have is for mounting to the drive shaft. I would stay away from drilling any holes in the brake drum to do any of this. And I dont think the the spedo uses any magnets. Brian 4905 Klamath Falls Oregon | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Rating: N/A |
Cory The drive shaft turns what every your rear end ratio is - number of times per tire rev - if you have a 4.10 - then the sahft turns 4 and 1/10 revs per tire revolution. But Use the RTS pulses from the front left hub - the signal is induced by the metal bosses passing by the magnet core of the pickup coil - The signal is available at the #1-(+) and the #4(ground) terminal on the back of the speedometer. The #1 terminal should have 2 wires going to it - light green and dark green The #2 terminal should have 2 wires going to it - white and black P.S. I will soon be offering the Rostra style 250-1223 - (now owned by Audiovox and marketed under there own name) for $195 Because it is no langer available from -> http://www.airbagit-store.com/product.asp?returnURL=default.asp&ID=84697 I will soon be a distrubuter - only difference will be the unit will carry the AutoVox Name Plate. Any questions / orders call 386***672***o571 or email me | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Rating: N/A |
OOOOPS - Prior message had wrong URL - sorry Cory The drive shaft turns what every your rear end ratio is - number of times per tire rev - if you have a 4.10 - then the sahft turns 4 and 1/10 revs per tire revolution. But Use the RTS pulses from the front left hub - the signal is induced by the metal bosses passing by the magnet core of the pickup coil - The signal is available at the #1-(+) and the #4(ground) terminal on the back of the speedometer. The #1 terminal should have 2 wires going to it - light green and dark green The #2 terminal should have 2 wires going to it - white and black P.S. I will soon be offering the Rostra style 250-1223 - (now owned by Audiovox and marketed under there own name) for $195 Because it is no langer available from -> Cory The drive shaft turns what every your rear end ratio is - number of times per tire rev - if you have a 4.10 - then the sahft turns 4 and 1/10 revs per tire revolution. But Use the RTS pulses from the front left hub - the signal is induced by the metal bosses passing by the magnet core of the pickup coil - The signal is available at the #1-(+) and the #4(ground) terminal on the back of the speedometer. The #1 terminal should have 2 wires going to it - light green and dark green The #2 terminal should have 2 wires going to it - white and black P.S. I will soon be offering the Rostra style 250-1223 - (now owned by Audiovox and marketed under there own name) for $195 Because it is no langer available from -> http://www.gowheels.com/cruise/ I will soon be a distrubuter - only difference will be the unit will carry the AutoVox Name Plate. Any questions / orders call 386***672***0571 or email me I will soon be a distrubuter - only difference will be the unit will carry the AutoVox Name Plate. Any questions / orders call 386***672***o571 or email me | ||
| Craig (Ceieio)
Rating: N/A |
Somehow my cheeks tighten up when I think about 15 tons on cruise control... Craig MCI 7 | ||
| Brian (Bigbusguy)
Rating: N/A |
Then Craig you would suck the seat cover off your seat when I tell you 99% of big truck have cruise control and thats 40 tons or more in some states. Brian 4905 Klamath Falls Oregon | ||
| Johnny Rating: N/A |
50+ tons in some cases--and even more with tandem trailers. The 1996 VanHool coach at work has cruise control. | ||
| Derek (Derek_l)
Rating: N/A |
I've seen 63 tons on cruise in the rockies, and it's unusual to see a tour bus without up here. | ||
| TWODOGS (Twodogs)
Rating: N/A |
and , most of the big trucks...ya' push on footfeed & it sends a signal to the computer & the computer tells the engine how fast to go... | ||
| Geoff (Geoff)
Rating: N/A |
I have the Rostra cruise control unit in my RTS with the driveline magnet sensor and it works great. I don't know why anyone would be worried about having cruise in a large vehicle-- I use mine to keep me from speeding so it actually is a safety benefit. --Geoff '82 RTS CA | ||
| James Maxwell (Jmaxwell)
Rating: N/A |
Pete: Do the pulses from the front hub match those of a magnetic sensor as used with an electronic cruise unit. I would think that they need to be of the same electrical characteristics. Put the drive shaft pick-ups on an Eagle a couple of yrs. ago and it was not that big of a job to go under there and set up the magnets and pick up unit. | ||
| CoryDaneRTS Rating: N/A |
OK, MY TURN! (" HAHAHAHAHA ") 2Dawgs, there are no stupid questions.... that said, Are you thinking of LOLA again??? Seems to me there was a song in the 70's about a guy named LOLA! Did you just happen to recall the CONTENT of that song? Besides, My job was in electrical distribution, I did not build cars! Place the expertise where it may lie. (" I would stay away from drilling any holes in the brake drum to do any of this ") Brian, the magnets get glued on, no holes drilled. I would not want to lessen the strength of the drum in any way. AS I HAD SAID, this was a thought that I had mulled over the other night. If it would work, it sure would make running the wiring easier. I don't have any hatches and its a pain to get under the bus by the drive shaft. I was just dreaming of a easy way out, of which, in this hobby, there are very few. thanks for the replies. cd | ||
| TWODOGS (Twodogs)
Rating: N/A |
was just laughing about you should have been an engineer... | ||
| Stan Rating: N/A |
Cory: The sender for front wheel drive speedos is usually one or two T shaped pieces fastened to the edge of the brake drum with 1/4 X 20 cap screws into tapped holes. It doesn't seem to hurt the brake drum as everyone does it. | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Rating: N/A |
Hi James Maxwell asked ...Pete: Do the pulses from the front hub match those of a magnetic sensor as used with an electronic cruise unit. I would think that they need to be of the same electrical characteristics.... James - The circuits tend to look for just what is called "leading edge transitions" - or the begining of the pulse shot - it's then amplified or clipped - smoothed out to remove bouces and processed - almost any pulse will do | ||
| Shelrands5302 Rating: N/A |
SORRY CD NOT THE SAME LOLA TWODOGS HAS SPENT ENOUGH TIME WITH ME TO KNOW THE DIFFERENCE..... GRANTED I MAY TASTE LIKE CHERRY COLA BUT THATS WHERE THE RESEMBALANCE ENDS TWODOGS I WARNED YOU SWEETIE THEY'D BE JEALOUS  LOLA | ||
| CoryDaneRTS Rating: N/A |
(" was just laughing about you should have been an engineer... ") And you are saying?????? The advantage of a board like this, is everyone, no matter who, has something to contribute. What was that saying "Some people please others with their charm and wit, Others by leaving the room!"? I try to base most of my comments on actual experience. Of the times where I must depend on theory, I do try to offer information that I can back-up. I am sure everyone does this. This thread had worked my mind for awhile and actually sounded do-able. So I threw it out to the others who have a bit more knowledge. You never know what you may come up with here on BNO. Yeah 2Dawgs, I should'a been an engineer. I love trains. cd | ||
| CoryDaneRTS Rating: N/A |
(" SORRY CD NOT THE SAME LOLA ") I knew this could get stinky.... I was just jabbing 2D's. I felt he was giving me a tease... Nothing toward you dear...Lola cd | ||
| TWODOGS (Twodogs)
Rating: N/A |
questions are GOOD....'should have been an engineer'...when you don't understand what a gear ratio is.....is funny..... OHHHHH LOLA....(same time next year ??) | ||
| http://autos.groups.yahoo.com/group/RTS-bus-nuts/ Rating: N/A |
Cory, had you asked your question on the RTS Yahoo Group, you would have gotten the same answer with a great deal less background noise. http://autos.groups.yahoo.com/group/RTS-bus-nuts/ | ||
| Shel rands5302 Rating: N/A |
CD less noise maybe but not nearly as much fun!! Lola | ||
| CoryDaneRTS Rating: N/A |
I tried to get on the board some time back but for some reason had a lot of trouble getting it to work. Never found the problem, then again, I guess I didn't spend all that much time to find a fix. I seem to find answers here, and 2Dogs provides the Comedy entertainment... cd | ||
| TWODOGS (Twodogs)
Rating: N/A |
........... | ||
| David Hartley
Rating: N/A |
Most electronic cruise control units don't actually care what the axle ratio is or how many pulses are sent from the sender. You can tywrap a single magnet to the driveshaft or 4 magnets. As long as units like the Rostra are used, They only look for pulses, More pulses means more resolution and faster cruise control response at lower speeds. The catch is that most cruise units are 12 volts, So be careful if your coach is 24 volts, I don't know if they apply a voltage to the mangetic circuit. On transits like the RTS,FLX and others the Turnstile/Ticket/Radio system is tapped into the stock sensor. Good Luck... DrDave | ||
| Jim Bob Rating: N/A |
Something I discovered the hard way about the Rostra (& maybe others) is that if the bus speed falls 5 MPH below the set speed & remains there for more than about 20 seconds, the unit will release. Usually this means you have to switch it off, and back on & reset at the correct speed. This used to happen to me on just about every overpass in flat Florida (before I replaced my N55 injectors with N60s). It still happens in bigger hills because the unit thinks you've been in an accident when the throttle can't get the vehicle up to speed in a set time. The result is that I have to anticipate the hills & give 'er full throttle about 1/3 mile before the hill to get up steam. Rostra was not able to remove this feature, saying it was designed in for safety. Most they did was have me back off the gain settings which helped less than going to bigger injectors. I wonder if the other units (like King) do this too? Jim-Bob | ||
| Geoff (Geoff)
Rating: N/A |
Jim Bob-- My driving habit it to tap the brake pedal (without activating the brake) when coming to a grade where I know the bus is not going to maintain the set cruise control speed. When I get over the top I hit the resume switch. There is no reason to go up a hill with the throttle pegged to the floor with the cruise control, all this does is overfuel your engine. When driving a diesel up a hill you only need to apply enough throttle to keep the bus going, any more than that is just wasted fuel which is overheating your cylinders. I think the built-in 20 second "falling out" of the Rostra unit on a hill is a good idea! --Geoff '82 RTS CA | ||
| Dwight Rating: N/A |
I have a rosta, getting pulses from the speedometer, if you hook it with the magnet set up on the drive shaft you will need the magnetic pick up (this set up is different than the pulses from the speedometer). I think (if I remeber right) pulses from the front wheel is ac and pulses from the magnetic pick up is dc?? The front hub has 60 bumps, tire turns (about) 486 turns per mile thats 29160 pulses per mile. The rosa I have has settings for the amount of pulses per mile, settings for the size of engine in the vehicle, gain settings and setting for what type of pulse it is getting, magnets on driveshaft or pulses from the speedometer. A word from experience, I had the magnetic pick up on the drive shaft, it did not work well (wires may have been too long, lost voltage) I now have the pules coming from the front wheel with the modulator under the dash, works a lot better. O' my cruise does not kick out when climing a hill, even though it drops down to first gear.... Dwight | ||
| Jim Bob Rating: N/A |
Geoff: My 4104 loses 5-8 mph on every one of the (seems like) thousands of I-95 overpasses here. If it would allow 8mph drop it wouldn't trip out. The bus does not smoke at any throttle setting except a small grey puff from a dead start. New N60s, std timing, valves, rack & governor settings double checked. Whether the cruise is on or not, you have to go up the hills with the throttle pegged. (4104 stock 6-71 + 170hp) Anyting taller than an overpass & you are downshifting. A 6% grade = 2nd gear. Dwight: I have 2 Rostra magnets on my driveshaft. Calculated pulses right in the middle of Rostra's desired range. Magnetic pulses are AC from either source. My speedo runs from 4 bolt heads on the front brake drum. No bumps on my (aluminum!) bearing hubs. Mine is stck shift & drops out before the speed at which you can downshift. (50mph from 4th to 3rd) Looks like Rostra works O.K. more hp or with auto trans. (Heck, it was designed for cars!) Jim-Bob |