1
GATE PI 2014
MCQ (Single Correct Answer)
+2
-0.6
Each axis of $$NC$$ machine is driven by a stepper motor drive with a lead screw. The pitch of lead screw is $$p$$ $$mm.$$ The step angle of stepper motor per pulse input is $$\alpha $$ degrees/pulse. The ratio of gear drive in stepper motor drive is $$g$$(number of turns of the motor for each single turn of the lead screw). The number of pulses required to achieve a linear movement of $$x$$ $$mm$$ is
A
$${{\alpha g} \over {360p}}x$$
B
$${{360g} \over p}x$$
C
$${g \over {360p}}x$$
D
$${{360g} \over {p\alpha }}x$$
2
GATE PI 2014
Numerical
+2
-0
A $$CNC$$ instruction $$G91\,\,\,G01\,\,\,X30\,\,\,Y40\,\,\,F100$$ commands the movement of tool along the path at a feed rate of $$100mm/min$$ $$(G91$$-incremental format and $$G01$$-linear interpolation). The feed rate of the tool (in $$mm/min)$$ along the $$X$$ axis will be _______________
Your input ____
3
GATE PI 2013
MCQ (Single Correct Answer)
+2
-0.6
In a $$CAD$$ package, mirror image of a $$2D$$ points $$P(5, 10)$$ is to be obtained about a line which passes through the origin and makes an angle of $${45^ \circ }$$ counterclockwise with the $$X$$-axis. The coordinates of the transformed points will be
A
$$(7.5, 5)$$
B
$$(10, 5)$$
C
$$(7.5, -5)$$
D
$$(10, -5)$$
4
GATE PI 2010
MCQ (Single Correct Answer)
+2
-0.6
For a $$3$$-axes $$CNC$$ table, the slide along the vertical axis of the table driven by a $$DC$$ servo motor via lead screw nut mechanism. The lead screw has a pitch of $$5mm.$$ This lead screw is fitted with a relative (incremental) circular encoder. The basic length unit $$(BLU)$$ of the slide along the vertical axis of the table is $$0.005mm.$$ When the table moves along the vertical axis by $$9mm.$$ The corresponding number of pulses generated by the encounter is
A
$$1400$$
B
$$1800$$
C
$$4200$$
D
$$9000$$
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