Van Door Motor Problem
 

OK so heres what happened....we designed and built our arm going by the specs FIRST gave us on the Taigene Van door motor and it was supposed to run at a free speed of 75 RPMs but once we hooked the arm up and tested it for the first time it was going really slow. so we made a mark on the motor shaft and timed it and it only was running at 50 RPMs under no load....has anyone else had this problem? or if anyone has a comment on this? we are kind of stumped

p.s. we tested one of the previous years van door motors and it ran at almost 80 RPMs.

Re: Van Door Motor Problem
 

how confident are you about your electrical connections? resistance will affect a bit. and how full were your batteries?

Re: Van Door Motor Problem
 

the batteries were fully charged...12.7 under load...and it was connected right to the battery soo there wasn't any resistance

Re: Van Door Motor Problem
 

If you have it hooked up into a drivetrain of some sort, there is no way it should be running at free speed even if there is no load on the arm, slider, winch, whatever. Chains, gears, shafts create friction that will slow it down when you think its under "no load"

Re: Van Door Motor Problem
 

no the tranny on the arm doesnt cause enough friction to slow it down at all...#1 your talking a 33% decrease in speed from 3 gears and chain....and #2 we tested it alone w/o anything also and it ran the same speed of 50 RPMs

Re: Van Door Motor Problem
 

Can someone just duplicate this test on a new Taigene and post your results here?
OR
Is there a known fault in the no load speed on the Taigene spec sheet??

Re: Van Door Motor Problem
 

K,
Since it is a new motor, the lubricant hasn't really had a chance to distribute itself inside the case. Run it for a while and I think you will find it will speed up. Due to the odd shape of this motor, they are often dropped or set down hard on the shaft (threaded end) which causes a bent shaft or a crack on the back side of the gearbox, this could cause misalignment of the gears and results in slow free speed. If you find a small crack, there is no coming back from this failure and it will only get worse with time.

Re: Van Door Motor Problem
 

188 tested the van door's free speed, and also got around 50 rpm. We didn't run it long enough for any significant wear on the worm gear or lubricant redistribution to take place. Older van door motors did indeed perform differently, but like Al said, it might be due to being a brand new motor, not yet broken in.

Maybe someone could lightly load a motor (known to run at 50 rpm) for a half-hour, and then re-measure the free speed, to see if any change took place.

Re: Van Door Motor Problem
 

its worth a try i guess

Re: Van Door Motor Problem
 

ya we ran the motor for over 30 min and it didnt really do much for speed....if anyone else has had the slow motor problem please post....

Re: Van Door Motor Problem
 

Our 2005 Van Door motor also runs ~50rpm free speed.

[edit]
I looked up the history of the Taigene spec.
See this thread http://www.chiefdelphi.com/forums/sh...hlight=taigene
In particular Joe Johnson's posts on the revised Taigene specs.

Re: Van Door Motor Problem
 

Ok, lets say that the speed of the motors doesn't get better, what would this mean? Are the specs wrong? or is there a problem with the motor? would they be less reliable?

Re: Van Door Motor Problem
 

Specs would be wrong. The results have been duplicated (or I suppose, the whole batch donated to FIRST could be defective, but that seems unlikely).

Re: Van Door Motor Problem
 

okie... some work was required in finding this out (not really) but its ok. its all for you guys.

The old motors are 75 rpm. The new ones look the same. And have a free rpm of 50. Life sucks. But.. the good part is that they have the same power. Torque is greater in the new motor, they equal out to roughly the same power. So... all it does is force all you people using it to redesign. Great...

Re: Van Door Motor Problem
 

so they didnt edit the spec then is what your saying? thats great... :ahh: