Belt pulley tooth count, What does it effect?

[Seshan]

I'm a little confused with what the tooth count/size effects? Like slower/faster, more torque/less torque. Can anyone help? Thanks.

[bdring]

The belt pitch (teeth per inch) is used to calculate your resolution (steps/in). In reality the belt pitch and pulley pitch sort of null each other out and it comes down to diameter. A pulley with half the pitch can still get the same steps/in if it has the same pitch diameter. Some belts have higher strength. Some belts have higher accuracy. Stock drive (www.sdp-si.com) has some good reference material.

http://www.sdp-si.com/D265/HTML/D265T010.html

I wrote a little tool to help on simple setups.

http://www.buildlog.net/cnc_laser/belt_calcs.htm