Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: vidam on May 31, 2009, 12:24:30 PM

Title: Drive Belt Question
Post by: vidam on May 31, 2009, 12:24:30 PM

Would it be a bad idea to have one drive belt for each motor. There are 4 motors on a ground vehicle.
These are the motors with sprocket already attached --> http://www.monsterscooterparts.com/24v20mowisp.html (http://www.monsterscooterparts.com/24v20mowisp.html)
The wheels also have sprockets attached. The wheel sprockets has approx. around 4 inches in circumference and has around 5 teeth per inch.

Those motors sprockets and the wheel sprockets need a compatible belt.

My guess is around 8 inches in total circumference length that also has 15 mm/.59 inches width and about 5 teeth per inch.

I was wondering if this belt would work? I can't read the specs real well.
https://sdp-si.com/eStore/PartDetail.asp?Opener=Group&PartID=2891&GroupID=213 (https://sdp-si.com/eStore/PartDetail.asp?Opener=Group&PartID=2891&GroupID=213)

If someone can help me read the specs to figure out if they would work with my motor sprockets and my wheel sprockets.

I just think one belt per motor would work out best with the chassis size limitations.
The motors look small on the website, but when I got them in the mail they were much bigger than I estimated. So now I need one motor and one belt. Like four wheel drive.

Title: Re: Drive Belt Question
Post by: DAGUROBOT on May 31, 2009, 12:51:55 PM

Try this

http://letsmakerobots.com/node/5954 (http://letsmakerobots.com/node/5954)

Title: Re: Drive Belt Question
Post by: vidam on May 31, 2009, 01:04:32 PM

That won't work for us. The belt is not wrapped around the wheels like in the link you sent.
The belt is actually wrapped around the motor and the wheel sprocket on the inside of the chassis.

Title: Re: Drive Belt Question
Post by: vidam on July 03, 2009, 03:53:17 PM

The drive belt was interfaced with the old ActivMedia Pioneer robot chassis. Here is a picture of it.
Revised Pioneer Drive Belt (http://picasaweb.google.com/Melanie.Vida/Pioneer#5354355070997865090)

(http://lh3.ggpht.com/_rNsKmWUa7nU/Sk59kYgjooI/AAAAAAAAAHU/yLTn3FM_Ix4/s576/DSCF2832cropped.jpg)

Title: Re: Drive Belt Question
Post by: antom on July 04, 2009, 06:59:20 PM

You have 2 different belt pitches. The motors have 5mm (metric) pitch x 15mm wide.The 5mm has a rounded tooth form. The wheels have a .200 (inch) XL pitch which has a trapezoidal tooth form. Even if the teeth had the same geometry, the pitch is not the same either. I would look for new posi-drive pulley(sprocket) for motors.

Title: Re: Drive Belt Question
Post by: Metal Slug 2 on July 04, 2009, 11:41:47 PM

This may be a little off topic, but you can get a belt and motor with sprocket easily from any old printer.  The belt is rather thin, but is very rigid and durable.

Title: Re: Drive Belt Question
Post by: vidam on July 05, 2009, 05:54:51 PM

Quote from: antom on July 04, 2009, 06:59:20 PM

You have 2 different belt pitches. The motors have 5mm (metric) pitch x 15mm wide.The 5mm has a rounded tooth form. The wheels have a .200 (inch) XL pitch which has a trapezoidal tooth form. Even if the teeth had the same geometry, the pitch is not the same either. I would look for new posi-drive pulley(sprocket) for motors.

We have tested the motors and there is enough tension on it that the motors turn reliably. If we have any issues at all, I would know what to do in the future- a) get a new belt or b) posi-drive pulley(sprocket) for motors.