CNC MACHINIST KNOWLEDGE ASSESSMENT.
G01
G02
G03
G17
G90 G01 X_Y_R_F_;
G17 G02 X_Y_R_F_;
G90 G01 X_Y_Z_F_;
G17 G03 X_Y_I_J_F_;
G01
G02
G03
G17
On
Emergency
Off
Ultimate
56.0
44.8
5.6
0.7
Blind hole drilling.
Spot drilling.
Center drilling.
Counter sinking.
Electric servo motor.
Hydraulic drive.
Manual crank.
Manual/hydraulic system.
Tap Drilling Speed
Total Diameter Size
Tap Drill Size
Tap Down Speed
Extended tool life.
A longer time to machine the workpiece.
Rapid tool wear.
A decreased use of coolant.
;
G
G00
%
They can handle heavy workpieces.
Chips accumulate on top of the workpiece.
Some of the spindles have vertical motion.
The crosslide can move transversally.
An arc hole pattern.
A bolt hole circle.
A linear hole pattern.
An angular hole pattern.
Low pressure
Medium pressure
High pressure
Gravity
It is the program feed rate.
It is the incremental dimensions from park location to cutting start and end points.
It is the absolute dimensions of the cutting start and end points.
It is the facing canned cycle command.
It is not possible to program tool nose radius compensation when using repetitive cycles G70-72.
When programming TNR inside the cycle, you must cancel the compensation inside the cycle.
It is not possible to program and cancel TNR outside the repetitive cycle
For pattern repeating cycle G 73 the operator programs the number of rough cuts and the DOC workpiece.
The ratio of cut from the far to near surface.
The depth of cut for the roughing pass.
It is a block number immediately following the G71.
It tells the CPU how the X value must be adjusted.
N020 T0101
N 030 G50 X8.500 Z7.500 S3000
N040 M04 S500 G96
N200 M05
4
3
2
1
For programs longer than 27 lines
Outside the work area.
For canned programs
With projects using 4 quarter addressing.
The coordinate along the X axis.
The coordinate along the Z axis.
The program feed code.
The linear interpolation code.
Reference point of the machine.
Face of the chuck.
X0 point.
Base of the tool turret.
For boring or internal facing the tool must be located above the cored diameter.
Only absolute values may be used for co-ordinate positions.
The starting point should be as far away from the workpiece as possible to assist with tool movement.
For external turning and facing the tool must be located above and in front of the workpiece.
G94
G76
G72
G68
The lead of the thread to four decimal places.
The length of the thread including the deceleration distance.
The minor diameter of the thread for external threads.
The depth of cut for the threading pass.
The block number of the first tool motion from tool park location for machining the finish profile.
The block number of the last tool motion completing the part profile and closing the repetitive cycle loop.
The amount of material left on the diameter for the finish cut.
The amount of material that is left on the Z faces for the finish cut.
Wait!
Here's an interesting quiz for you.