Originally Posted by
Andreiir
I will make my point of view , u cant compare some belts with a rack and pinion , for ur need belts are ok , if u dont seek good tolerances , for hobbie work and how much they cost is fine , but for industrial work , millling machines , or other high power milling , they are not suitable for work , because belts cant achive tolerances u have with a ballscrew or a rack and pinion systems , because belts are stretching under high load and u will have high vibration in endmill .
Printers , lasers , etc low inertia systems are using belts sometime with encoders , because there is low forces to encounter on moves , just the inertia of head .
All the systems have they places , the best is for when u achive ur tolerances , see some people need 1mm tolerances , someone need 0.1mm others need under micron .
See the people who had 1 mm tolerances is w happy with his chain , other who get under 1 mm is w happy with belts , others who need tight tolerances are happy with ballscrews.