Mitsubishi MELSEC-Q Series User Manual page 67

4
DATA USED FOR POSITIONING CONTROL
Bias speed at start
Pr.5
[Setting contents]
[Precautions]
POINT
• Set the minimum starting speed for positioning control and JOG operation.
• In case of using a motor such as a stepping motor, set this item to start the motor
smoothly. (A stepping motor does not start smoothly if the motor speed is low at
start.)
• The minimum starting speed during
• Set a value equal to or less than "
If setting a value greater than "
start setting range" error (error code: 906) occurs.
• Setting unit (pulse unit) changes according to the value set to "
value" as the table below.
Setting value of
1 to 8000
" Speed limit
Pr.4
value" (pulse/s)
Pulse unit 1-pulse unit
When setting " Speed limit value" to 100000 (pulse/s) (when pulse unit is
Pr.4
25-pulse unit), set a value which is "multiples of 25" to "
start".
If setting a value that does not satisfy the condition, the value is dropped so that it
can be multiples of 25. Note if setting a value under 25, corresponding to pulse
unit, "Out of bias speed at start setting range" error (error code: 906) occurs.
If the workpiece is dragged at start, the value set to Bias speed at start may be
small. In this case, set Bias speed at start using the following formula as a
reference.
Bias speed at start
Pr.5
Speed limit value".
Pr.4
Speed limit value", "Out of bias speed at
Pr.4
8001 to 32000 32001 to 64000
4-pulse unit 8-pulse unit
Acceleration 125 Pulse unit
4.2 Parameter List
Speed limit
Pr.4
64001 to 100000
25-pulse unit
Bias speed at
Pr.5
4
- 10
1
2
3
4
5
6
7
8