Mitsubishi Electronics QD75D, QD75P Set the post-compensation, No. of pulses per rotation Ap

12 CONTROL SUB FUNCTIONS

MELSEC-Q

Calculation example
(Conditions)
Movement amount per pulse	∝
No. of pulses per rotation	: 500 ( m/rev)
	: 12000 (pulse/rev)
Unit magnification	: 1
(Positioning results)
Command movement amount	: 100mm
Actual movement amount	: 101mm
(Compensation amount)

	AL'		5⋅ 103	⋅	101⋅ 103	5050		101
		=				=		=
					101⋅ 103
	AP'		12000			12000		240
Movement amount per pulse						: 101	∝
No. of pulses per rotation							( m/rev)		[Set in
						: 240	(pulse/rev)
Unit magnification						: 1			[Set in

[Set in

Pr.3

Pr.2

Pr.4

]

]

]

(e) Set the post-compensation "

Pr.2

No. of pulses per rotation (Ap')",

"

Pr.3

Movement amount per rotation (Al')", and "

Pr.4

Unit

			magnification (Am')" in the parameters, and write them to the QD75.
			The set details are validated at the rising edge (OFF		ON) of the
			PLC READY signal (Y0).
	Setting item		Setting	Setting details	Pre-compensation
			value		value
		No. of pulses per
Pr.2			Ap'	Set the post-compensation value.	Ap
		rotation
		Movement amount
Pr.3			Al'	Set the post-compensation value.	Al
		per rotation
Pr.4		Unit magnification	Am'	Set the post-compensation value.	Am

Refer to Section 5.2 "List of parameters" for setting details.

12 - 15