Subject:
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Re: how do I use this technic 9v motor I bought?
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Newsgroups:
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lugnet.general, lugnet.technic
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Date:
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Tue, 10 Apr 2001 08:03:17 GMT
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Viewed:
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1240 times
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In lugnet.general, Jonathan Wilson writes:
> I just picked up one of the old style 9v technic motors and I am having a
> problem.
> http://w3.one.net/~hughesj/technica/registry/9volt/2838.gif
> it works just fine when I just run it so the motor is ok.
> If I make it into a vechicle however, it works when I hold it in the air but
> not when I put it on the bench, carpet, floor, tiles, desk etc etc etc.
> I guess I am doing something wrong with the gears I am using (I tried with
> various combos, including an 8 teeth on the motor and a 24 teeth on the
> driveshaft but that didnt work), choice of wheels or something.
>
> Can someone point me to a set (or MOC) that shows how to use the old style 9v
> motor with one of the folowing wheel types?
> the 30.4x14VR (as used on the red speed slammers car)
> http://w3.one.net/~hughesj/technica/registry/wheel/2994.gif
> the 49.6x28VR (as used on the boss roborider & the millenium slizer)
> http://w3.one.net/~hughesj/technica/registry/wheel/6595.gif
> the 43.2x28S (as used on the "mud masher")
> http://w3.one.net/~hughesj/technica/registry/wheel/6580.gif
> I can also get some of the 13x24 hubs (as used in model team sets & the 8835
> forklift & also the 8255 rescue trike) but it will be time consuming to get
> hold of them so I dont want to if I dont need to.
> http://w3.one.net/~hughesj/technica/registry/wheel/2695.gif
>
> I want to know what gears etc I should be using to get this thing working with
> the wheels I have.
> In case it matters, I am using one of the small system battery boxes, does that
> make a difference?
> http://w3.one.net/~hughesj/technica/registry/9volt/4760.gif
> I am planning to use some of the old "crown gears" to connect the motor axle to
> the back rear axle.
> http://w3.one.net/~hughesj/technica/registry/gear/gear4_03.gif
>
> I also intend to use the old steering link parts such as the steering arm, 81
> to steer this vechicle, in case that makes a difference.
> http://w3.one.net/~hughesj/technica/registry/connect/4261.gif
>
> I dont want to find out that this $20 electric motor I just bought is just an
> expensive paperweight :)
>
> Or alternativly if someone has scans of the instructions that come with the old
> 9v motor, mabie that could help...
Yeah, this motor usually needs to be geared down two or three times to get a
sufficient amount of torque. Most of the official sets seem to use pulleys
and rubber belts rather than gears (probably because these are much quieter
than gears) but gears would work just as well. I tend to use 1:27 or 1:81
reduction ratios when utilizing this motor.
-Gaurav Thakur, raving madman
Can be reached at cp5670@supermail.com
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