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6 POSITIONING CONTROL
6.13 Speed Control ( )
(1) Speed control for the specified axis is executed.
(2) Control includes positioning loops for control of servo amplifiers.
(3) Speed control (
) uses the VF (Forward) and VR (Reverse) servo instructions.
Items set using MT Developer
Common Arc Parameter block Others
Servo
instruction
Positioning
method
Number of
control axes
Parameter block No.
Axis
Address/travel value
Command s
eed
Dwell time
M-code
Tor
ue limit value
Auxiliar
oint
Radius
Central
oint
Control unit
S
eed limit value
Acceleration time
Deceleration time
Ra
id sto
deceleration time
Tor
ue limit value
Deceleration
rocessin
on sto
in
ut
Allowable error ran
e for circular inter
olation
S-curve ratio
Cancel
WAIT-ON/OFF
Speed change
VF
VR
1
Valid
: Must be set
: Set if required
[Control details]
(1) Controls the axis at the specified speed until the input of the stop command after
starting of the servomotors.
• VF ......... Forward direction start
• VR ........ Reverse direction start
(2) Current value does not change at "0".
Stop
Stop command accept
Setting
speed
V
Speed
control
start
Operation speed
t
Fig.6.26 Speed control ( )
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