Table of Contents
Advertisement
9 MAJOR POSITIONING CONTROL
9.2.6 1-axis fixed-feed control
In "1-axis fixed-feed control" ("
used to carry out fixed-feed control in a set axis direction.
In fixed-feed control, any remainder of the movement amount designated in the
positioning data is rounded down if less than that required for control accuracy to
output the same amount of pulses. (The remainder of the movement amount with an
accuracy below the control accuracy does not affect the regular controls.)
Operation chart
In 1-axis fixed-feed control, the address (
stop position (start point address) is set to "0". Positioning is then carried out to a
position at the end of the movement amount set in "
address/movement amount".
The movement direction is determined by the movement amount sign.
0
Positioning
Designated movement
amount
start
Reverse direction
Movement direction for
a negative movement amount
Restrictions
(1) An axis error "Continuous path control not possible (error code: 516)" will
occur and the operation cannot start if "continuous path control" is set in
"
Da.1
Operation pattern". ("Continuous path control" cannot be set in fixed-
feed control.)
(2) If the movement amount for each axis exceeds "1073741824 (=2
"outside linear movement amount range error (error code: 504)" will occur at
the positioning start, and a start will not be possible. (The maximum movement
amount that can be set in "
"1073741824 (=2
(3) "Fixed-feed" cannot be set in "
when "continuous path control" has been set in "
the immediately prior positioning data. (For example, if the operation pattern of
positioning data No. 1 is "continuous path control", fixed-feed control cannot
be set in positioning data No. 2.) An axis error "Continuous path control not
possible (error code: 516)" will occur and the machine will carry out a
deceleration stop if this type of setting is carried out.
Da.2
Control system" = fixed-feed 1), one motor is
Md.20
0
0
Da.6
Positioning address/movement amount" is
30
.)".)
Da.2
Control system" in the positioning data
9 - 43
Current feed value) of the current
Da.6
Positioning
Md. 20 Current feed
value is set to "0" at
the positioning start
0
0
Stop position
Movement direction for
a positive movement amount
Da.1
Operation pattern" of
MELSEC-Q
Forward direction
30
)", an
Advertisement
Table of Contents
