Question
A CNC machine has one of its linear positioning axes as shown in the figure, consisting of a motor rotating a lead screw, which in turn moves a nut horizontally on which a table is mounted. The motor moves in discrete rotational steps of 50 steps per revolution. The pitch of the screw is 5 mm and the total horizontal traverse length of the table is 100 mm. What is the total number of controllable locations at which the table can be positioned on this axis?
Options :
5000
2
1000
200
Answer :
1000
Solution :
Given,
Steps per revolution = 50
Total table movement = 100 mm
Pitch of lead screw = 5 mm
So, In 50 steps lead screw moves 5 mm
50 steps = 5 mm,
hence 10 steps are required to move 1 mm.
So, number of steps required are = 100 x 10 = 1000
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