Specifications

3 - 5
3.2.2 QD75 main functions
The outline of the main functions for positioning control with the QD75 is described
below.
(Refer to QD75 User's Manual for details on each function.)
Main functions Details
Machine OPR control
Mechanically establishes the positioning start point
using a zeroing dog or stopper.
(Positioning start No. 9001)
OPR control
Fast OPR control
Positions a target to the OP address (Machine feed
value) stored in the QD75 using machine OPR.
(Positioning start No. 9002)
Linear control
(1-axis linear control)
(2-axis linear interpolation control)
(3-axis linear interpolation control)
(4-axis linear interpolation control)
Positions a target using a linear path to the address
set in the positioning data or to the position
designated with the movement amount.
Fixed-feed control
(1-axis fixed-feed control)
(2-axis fixed-feed control)
(3-axis fixed-feed control)
(4-axis fixed-feed control)
Positions a target by the movement amount
designated with the amount set in the positioning
data.
(With fixed-feed control, the current feed value is set
to "0" when the control is started. With 2-, 3-, or 4-axis
fixed-feed control, the fixed-feed is fed along a linear
path obtained by interpolation.)
Position
control
2-axis circular interpolation control
Positions a target using an arc path to the address set
in the positioning data, or to the position designated
with the movement amount, sub point or center point.
Speed
control
Linear control
(1-axis linear control)
(2-axis linear interpolation control)
(3-axis linear interpolation control)
(4-axis linear interpolation control)
Continuously outputs the pulses corresponding to the
command speed set in the positioning data.
Speed-position switching control:
First, carries out speed control, and then carries out
position control (positioning with designated
movement amount) by turning the "speed-position
switching signal" ON.
Position-speed switching control:
First, carries out position control, and then carries out
speed control (continuous output of the pulses
corresponding to the designated command speed) by
turning the "position-speed switching signal" ON.
Current value changing
Changes the current feed value to the address set in
the positioning data.
The following two methods can be used.
(The machine feed value cannot be changed.)
• Current value changing using the control system
• Current value changing using the current value
changing start No. (No.9003)
NOP instruction
Non execution control system. When NOP instruction
is set, this instruction is not executed and the
operation of the next data is started.
JUMP instruction
Unconditionally or conditionally jumps to designated
positioning data No.
LOOP
Carries out loop control with repeated LOOP to
LEND.
Positioning control
Other
control
LEND
Returns to the beginning of the loop control with
repeated LOOP to LEND.