Instruction manual

8. OUTPUT MODULES
8 − 19
8.4.1 Cam operation
The operation of cams is described below.
(1) Procedure for switching from the REAL mode to the VIRTUAL mode
On switching from the REAL mode to the VIRTUAL mode, perform device
setting in accordance with the following procedure using the sequence
program.
(a) Set a cam number and stroke in the "cam No. setting device" and "stroke
setting device" set for each axis in the cam shaft parameters.
Switch the cam reference position setting signal (M3214+20n) ON/OFF as
required.
(See Section 8.5.1(2) (q))
(b) Issue a REAL mode→VIRTUAL mode switching request
(M2043: OFF→ON)
(c) Start operation based on the cam pattern, stroke and cam reference setting
signal, set for each cam shaft.
(2) Processing on switching from the REAL mode to the VIRTUAL mode
When a switch is made from the REAL mode to the VIRTUAL mode, the cam
shaft current value in one revolution is indexed based on the cam reference
position setting signal (M3214+20n), the feed current value, the stroke lower
limit value, the stroke and cam No. (cam pattern), at that time.
(3) Operation
A value based on the cam shaft current value in one revolution and calculated
using the stroke ratio in the cam data table is output.
[(Feed current value) = (stroke lower limit value) + (stroke) × (stroke ratio)]
The cam shaft current value in one revolution is determined by the travel value
calculated by multiplying the drive module travel value by the transmission
module gear ratio or other applicable value.
The number of PULSES per stroke is controlled based on the travel value per
PULSE set in the fixed parameters in the REAL mode.