| Author |
Message |
Johnny (4.174.103.130)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 14, 2004 - 9:10 pm: | |
I think so. I was in Boston today, and on the new low-floor CNG-powered MBTA buses (I think Grumman/Flxibles), I heard the distinctive "whoosh-whoosh" of air wipers, in what was clerarly an intermittent setup. Nothing specific...but SOMEONE is making them. |
James Maxwell (Jmaxwell) (66.81.43.14)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 14, 2004 - 9:17 pm: | |
More than likely it was a Flyer, not a Grumman/Flx, since they both folded, separately and collectively, well before the low floor buses. I have adjustable intermittent on my '90 Neoplan Jetliner. Air wipers, electric control by solenoid of the intermittent |
Bill K. (209.86.72.248)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 14, 2004 - 9:27 pm: | |
Where could a person get a set up like that? |
Derek (Derek_L) (172.160.146.3)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 14, 2004 - 11:46 pm: | |
I've seen intermittant on MCI 102DL3's with air wipers. |
Phil Dumpster (24.16.243.37)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 12:43 am: | |
A microswitch, a variable delay circuit and an electric solenoid air valve would be all that is needed to make your own. |
RJ Long (67.181.211.253)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 1:05 am: | |
That SOMEONE who's making these intermittant air wipers is the same someone who's been making the air wipers forever: Sprague.
You can get the parts from any of the major bus parts houses, they're now quite common. Luke may even have them, too! (1-888-262-2434 is his T/F number, btw.)
HTH,
RJ
PD4106-2784
Fresno CA |
James Maxwell (Jmaxwell) (66.81.41.182)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 2:22 am: | |
Phil & RJ are both right on on this. They are the same Sprague air motors as are on my Grumman w/ the added parts that Phil mentions. |
Eagle 10 (64.14.92.197)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 11:29 am: | |
Has anyone set up the intermittent wipers using the original Eagle 10 wipers? My rebuilt wipers work fine but I would like to put intermittent on the set up. Any ideas on parts or who might have some kind of kit available? |
mel 4104 (66.119.33.135)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 10:13 pm: | |
the transit co . around here have had intermittent wipers on them they all have thesprague wiper motor. |
Phil Dumpster (24.16.243.37)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 15, 2004 - 10:43 pm: | |
You'd have to add a microswitch to your existing wiper motor assembly that switches the contacts when the wiper is in the home position. This switch is run to a solenoid valve that shuts off the air when the wiper is in the home position. Then the delay circuit is used to bypass this microswitch, causing the wipers to cycle left and right.
For those who don't know, microswitches are small boxlike switches with a small "finger" sticking out of the side. Push in the finger and the contacts switch. Most are SPDT so they can be used in either normally open or normally closed circuits. Most can switch 3A which should be enough for most solenoid valves. If not, you can add a relay.
A common application for microswitches is to read the position of a shaft through a cam; The cam lobes press in the finger in a given position. To read the position of a linkage, a lever is added to the switch; the linkage contacts the lever, which activates the switch.
There are other switching methods that could be used, some probably more durable in a dirty environment. A magnet and a reed switch is doable, as are optical sensors and hall-effect sensors. The microswitch has the advantage of being very simple. |