Fixed-Feed Control - Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual

Fixed-feed control

In Fixed-feed control ([Da.2] control method = Fixed-feed 1, fixed-feed 2), motors for the number of specified axes are used to
perform the fixed-feed control in the set axis direction.
In the fixed-feed control, any reminder of the movement amount specified in the positioning data is rounded down to output
the same amount of pulses if it is less than that required for control accuracy.
Operation chart
In the fixed-feed control, the address ([Md.20] Current feed value) of the current stop position (start point address) is set to 0,
and the positioning for the movement amount set in [Da.6] Positioning address/movement amount is implemented. The
movement direction is determined by the sign of the movement amount.
• Example of the 1-axis fixed-feed control
0
Specified
movement
Positioning
amount
start
Reverse
direction
Movement direction if travel amount is negative
• Example of the 2-axis fixed-feed control
Y
Specified
movement
amount
Restrictions
• If "11: Continuous path control" is set in [Da.1] Operation pattern, Continuous path control not possible (Error code: 1A1FH)
occurs and the control will not start. (In the fixed-feed control, "11: Continuous path control" cannot be set.)
• Fixed-feed cannot be set in [Da.2] Control method in the positioning data when "11: Continuous path control" is set in [Da.1]
Operation pattern of the immediately previous positioning data. For example, if the operation pattern of the positioning data
No.1 is "11: Continuous path control", the fixed-feed control cannot be set to the positioning data No.2. If this setting is
configured, Continuous path control not possible (Error code: 1A1FH) occurs and the deceleration stop is implemented.
• With 2-axis control, if the movement amount of each axis exceeds 1073741824 (= 2
[Pr.20] Interpolation speed specification method, Outside linear movement amount range (Error code: 1A15H) occurs at the
start of the positioning and the positioning will not start. (The maximum movement amount that can be set in [Da.6]
Positioning address/movement amount is 1073741824 (= 2
9 MAJOR POSITIONING CONTROL
120
9.2 Positioning Data Settings
0 0
Stop position
Set "[Md.20] Current feed
value" to 0 for each axis
during positioning start
(0, 0)
(0, 0)
Specified movement
amount
Set "[Md.20] Current
feed value" to 0 during
positioning start
0 0
Forward direction
Movement direction if travel amount is positive
(0, 0)
30
).)
X
30
) when 0: Composite speed is set in