APPENDICES

MELSEC-Q

FIXED-FEED

This is the feeding of a set dimension for cutting sheet and bar workpieces into the designated dimensions. Incremental system positioning is often used. The current value is not incremented, even when the feed operation is repeated.

FLASH MEMORY

This battery-less memory can be used to store parameters and positioning data for backup. Because it is battery-less, battery maintenance is not required

FLAT TYPE MOTOR (PANCAKE MOTOR)

About 100mm shorter in axial dimension than the standard motor. Used when the servomotor is installed in a small space.

FLS SIGNAL (forward limit signal)

This is the input signal that notifies the user that the limit switch (b contact configuration, normally ON) installed at the upper limit of the positioning control enabled range has been activated.

The positioning operation stops when the FLS signal turns OFF (non-continuity).

G CODE

These are standardized (coded) 2-digit numerical values (00 to 99) designating various control functions of the NC module. Also called G functions.

Example :

G01 Linear interpolation

G02 Circular interpolation CW (clockwise)

G04 Dwell

G28 OPR

G50 Max. spindle speed setting

GAIN

The changing of the ratio between two values having a proportional relation. Seen on a graph, the changing of the incline of the characteristics.

 

 

Raising

13

 

the gain

 

 

10

 

 

Output

 

Lowering

2

 

the gain

 

 

 

Input

10

 

 

For example, when 10 is output for an input of 10, the output can be changed to 12, 5, etc., by changing the gain.

GD2

The inertia moment. The sum total of the mass (dm) of each small area configuring an object multiplied by the square of the distance (r) of each of those areas from a given straight line. The relation with I = r2dmGD2 is given by 4gI, with "g" being gravitational acceleration.

Appendix - 77

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Image 719
Mitsubishi Electronics QD75D, QD75P FLS Signal forward limit signal, G50 Max. spindle speed setting, Raising, Gain