Project ForgeManufacturing Engineering
Machining Processes
GATE 2023
Medium
A CNC machine's linear positioning axis has a motor rotating a lead screw that moves a nut (and mounted table) horizontally. 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?
- A5000
- B2
- 1000
- D200
Explanation
Each motor step moves the table by (screw pitch)/(steps per rev)=5/50=0.1 mm. Over the total traverse of 100 mm, the number of controllable positions=100/0.1=1000.
Source: GATE ME 2023 Official Paper (2023)
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