IAI SCON-CB-F, Instruction Manual

Page: 257 / 450

3. Operation
241
3.3.4 Setting of Basic Parameters Required for Operation
It is a mandatory parameter to perform an operation.
(The parameters listed in the table below may only be set if the actuator performs only
positioning operation.)
Parameter No. Parameter Name Details
65 Electronic Gear Numerator
66 Electronic Gear Denominator
This parameter determines the unit travel distance of
the actuator per command pulse train input 1 pulse.
63 Command Pulse Mode Specifies the command pulse train input mode.
64
Command Pulse Mode Input
Polarity
Sets the type of active high/low of the specified pulse
train
[1] Electrical Gear Setting
This parameter determines the unit travel distance of the actuator per command pulse train
input 1 pulse.
User Parameter No.65/No.66 Electronic Gear Numerator/Denominator
No. Name Symbol Unit Input Range
Initial Value
(For reference)
65 Electronic Gear Numerator CNUM – 1 to 99999999 2048
66 Electronic Gear Denominator CDEN – 1 to 99999999 125
The input range is from 1 to 4096 if the controller version is earlier than V0005.
Determine the movement amount and calculate value for the electric gear setting by following
the formula below:
Line Axis Unit Travel Distance: Min. Travel Distance Unit (1, 0.1, 0.01mm etc.)/pulse
Rotary Axis Unit Travel Distance: Min. Travel Distance Unit (1, 0.1, 0.01deg. etc.)/pulse
„
Electronic Gear Formula:
In the case of Line Axis
In the case of Rotary Axis
Note 1 : Number of encoder pulse of each actuator, refer to catalog of each actuator or
instruction manual.
„
Formula for velocity:
The velocity of the actuator can be figured out with the following formula.
Velocity = Unit Travel Distance × Input Pulse Frequency [Hz]
Caution: When the controller version is earlier than V0005
For those models with 131072 pulse/rev for the number of encoder pulse such
as ISB, the electric gear ratio setting may exceed the upper limit of the internal
arithmetic. In such a case, adjust the unit movement amount to appropriate.
Also, contact IAI if the usage condition of wish cannot be satisfied.
Electronic Gear
Numerator (CNUM)
Electronic Gear
Denominator (CDEN)
= No. of Encoder Pulses
(Note 1)
[pulse/rev]
Actuator Lead Length [mm/rev]
×
Unit Travel Distance [mm/pulse]
= No. of Encoder Pules
(Note 1)
[pulse/rev]
360 [deg/rev] × Rotary Axis Reduction Ratio
×
Unit Travel Distance [deg/pulse]
Electronic Gear
Numerator (CNUM)
Electronic Gear
Denominator (CDEN)