First steel diy CNC router build

[ivars211]

Yes, having some pictures would help. What do you mean by 2:1 ratio, does that mean that pulley diameter(or circumference) that's attached to motor is 2 times the ones attached to x axis?

[JAZZCNC]

Yes, having some pictures would help. What do you mean by 2:1 ratio, does that mean that pulley diameter(or circumference) that's attached to motor is 2 times the ones attached to x axis?

Ok I'll take pic for you tomorrow.

The ratio works other way around. The driver is always expressed before the driven. So in this case the motor turns 2 revolutions while the screw turns 1 revolution.
Or put another way the motor moves twice the distance the screw does. So with a 10mm pitch screw 1 revolution of the motor will equal only 5mm movement not 10mm or put another way only half turn of the screw. This gives the same resolution as 5mm pitch at 1:1 ratio but with the added affect of increasing torque but at the cost of speed. Now because the Pitch is higher the same speed is achieved as 5mm pitch at 1:1.

This won't affect you because your not using long screws but the other benifit of using higher pitch screw with a ratio applied is that screw speed is reduced for the same speed as lower pitch screw at 1:1 ratio so reduces chance of whip on long screws. But again at the cost of speed compared to same screw at 1:1 ratio.

Look here for a simple explination of ratios etc. Gears Index Page