Filter
Top Products
60
Position control (Pr. 419 to Pr. 430,
Pr. 464 to Pr. 494)
(2) Operation by position command using parameters
• Acceleration/deceleration time is 0.1s minimum and 360s maximum.
• Acceleration/deceleration reference speed (Pr. 20) is clamped at a minimum of 500r/min.
• Deceleration time can be set in Pr. 464 "digital position control sudden stop deceleration time".
• At this time, the acceleration/deceleration patterns are all linear acceleration and the setting of Pr. 29
"acceleration/deceleration pattern" is invalid. (Refer to page 89 for Pr. 29.)
2.7.6 Setting the electronic gear
Adjust the ratio of the machine side gear and the motor side gear.
The position resolution (travel per pulse
Δ [mm]) is determined by the travel per motor revolution Δ s [mm] and the
feedback pulses Pf [pulse/rev] of the detector, and is represented by the following expression.
Using the parameters, the travel per command pulse can be set separately to set the travel per command pulse
without a fraction.
The relationship between the motor speed and internal command pulse frequency is as follows.
CAUTION
Information on multi-speed command (position command) is determined at rising of the forward
(reverse) command to perform position control.
Therefore, set forward (reverse) command after multi-speed command (position command).
Position feed is invalid if the multi-speed command is given after forward (reverse) command.
CAUTION
Set the electronic gear in the range of 1/50 to 20.
For products manufactured in July 2003 and thereafter, the electronic gear will function within the range
of 1/900 to 900. However, it is recommended to use the electronic gear within the range of 1/50 to 20.
Note that too small a value will decrease the speed command and too large a value will increase the
speed ripples. Check the rating plate for the month when the inverter was manufactured. (Refer to page
220.)
Servo on (LX)
Speed
RH
STF
STR
RM
Feed speed
Pr.4
Feed amount pulses
Pr.466 10000 Pr.465
Pr.5
Sudden stop
when STF turns off
Position feed is
effected by sending
run command by
contact input.
Y
36
In-position
Pr. 464
Pr.7
(Pr. 44, Pr. 110)
Pr.8
(Pr. 45, Pr. 111)
Shaded part is the travel
Pf
Pf
:Travel per motor revolution [mm]
:Travel per pulse [mm]
:Number of feedback pulses [pulse/rev]
(the number of pulses after multiplying the number of encoder pulses by 4)
Pf
Pr. 420
Pr. 421
Pr. 420
Pr. 421
= Pf
No
60
fo
No:Motor speed [r/min]
fo: Internal command pulse frequency [pps]