CNC Router Accuracy

This is a great topic because everybody wants to know how accurate of a machine that they are buying or building. Here is some helpful information to consider.

• Accuracy in any simple CNC machine boils down to one thing. The accuracy of your lead screw or ball screw. There are of course other factors but in the end this is the big one.
• There is also some softwares that allows you to "map" your ball screw so that you can adjust your machine to be more accurate. This is done by almost all CNC manufacturers out there.
• Servo driven machines are no different because they work with a rotary encoder that trusts the accuracy of the ballscrew.
• The other factors that aafect the accuracy of your machine are heat, moisture, wear, tightness of srive components, and backlash in the drive system.
• Here at Modular CNC we handle backlash using a double nut system and a little preload.

I hope this helps explain accuraccy during your machine build.

Thanks, Andy