Question

In a point to point control NC machine, the slides positioned by an integrally mounted motor drive. If the specification of the motor is 1 deg/ pulse, and the pitch of the lead screw is 3.6 mm. What is the expected positioning accuracy?

• A. 100 micron
• B. 1 micron
• C. 10 micron
• D. 50 micron

Answer 1

The correct option is C 10 micron

For 1 rev. of lead screw slide will move by 3.6 mm
1 rev. $={360}^{\circ }=360$ pulses
360 pulses will cause motion of 3.6 mm
1 pulse will result in $\frac{3.6}{360}mm$of motion
i.e.. $0.01mmor10\mu m$