Mitsubishi Electronics QD75D, QD75P user manual NC Language Numerical Control Language, Rate

APPENDICES

MELSEC-Q

MOVEMENT AMOUNT PER PULSE

When using mm, inch, or degree units, the movement amount is calculated and output from the machine side showing how much the motor shaft moves per pulse. Positioning accuracy in smaller units is not possible.

On the motor side, the movement amount per axis rotation is normally designed as a reference, so it is calculated as follows.

Movement amount per pulse =

P rate		Movement amount
No. of pulses per	⋅
		per rotation
encoder rotation

Amount the motor moves (travel) per pulse.

MULTI-PHASE PULSE

A combination of pulses in which 2 or more phases differ.

2-phase pulses, etc.

A phase

B phase

Phase difference

Zphase (ZERO signal)

MULTIPLYING RATE SETTING

The P rate. Refer to the term "P RATE".

NC LANGUAGE (Numerical Control Language)

NEAR-POINT DOG

This is a switch placed before the OP. When this switch turns ON, the feedrate is changed to the creep speed. Because of that, the time that this switch is ON must be long enough to allow for the time required for deceleration from the feedrate to the creep speed.

Feedrate

		Creep speed
Time	ON	OFF
	Near-point dog

NEW CURRENT VALUE (CURRENT VALUE CHANGING)

The QD75 has no way of knowing the current value when the machine is assembled and the positioning module is connected, so this function is used to teach it a temporary approximate value as the current value. This function can also be used to write a temporary current value when the current value has been lost due to accidents, etc. If an OPR is carried out after that, the positioning module will recognize the zero point.

To prevent the accumulated value from exceeding the stroke limit in fixed-feed, etc., rewrite the current value to 0 after the fixed- feed. The current value can be changed during a positioning stop.

This is the language punched into the paper tape that instructs the machining to the NC module.

The NC language consists of EIA codes (EIA language), ISO codes (ISO standards), and JIS codes (JIS standards).

Appendix - 81