User`s manual

9 - 8
9
[2] Restriction 2 when setting up the electronic gear
All speed system data shown below is subject to the restriction in the following equations according
to the setting of electronic gear 1 (M1/D1) as the pulse speed that can be output from this module is
a maximum of 500 kpps (differential driver) or 250 kpps (open collector output).
• Differential driver output
500kpps M1/D1×speed system data
• Open collector output
250kpps M1/D1×speed system data
Speed system data items
• Reference speed (parameter 1 address A+0010 to 0013)
• Maximum speed (parameter 1 address A+0014 to 0017)
• Target speed (instruction speed at direct operation, speed data at program operation)
[Example]
Assuming that the M value is 400 and the D value is 40, the speed system data becomes as
follows in the case of pulse differential output:
500kpps 400/40×speed system data
50kpps speed system data
The speed system data must be set within this setting range.
[3] Details of electronic gear
(1) Electronic gear 1 (instruction value)
The "electronic gear" is a determined travel distance per single pulse among the pulses that are
output from this module.
M1 value (instruction value)
The value is the number of pulses that are required to turn the shaft that drives the table, for
example, one rotation. This value is set to parameter 2 address B+0030 to 0033.
(Note) When a gear is attached to the motor and shaft, set the value taking the gear ratio into
consideration.
D value (instruction value)
This value sets the travel distance when the shaft that drive the table, for example, turns one
rotation. This value is set to parameter 2 address B+0034 to 0037. Determine any unit (µm, mm,
cm, m, degree, inch, etc.) as desired.
Normally, this setting value is calculated from the pitch of the shaft. Actual measured values are
also acceptable.
Speed system data items
The instruction value M1 value becomes 200 when 100 pulses are required to operate the motor
by one turn, and the gear ratio between the motor and shaft is 2:1 (shaft rotates one turn for every
two motor rotations).
M=100×2/1=200
Also, the instruction value D1 value becomes 30 when the minimum unit to be managed is set to
0.1 mm assuming that a single rotation of the shaft causes 3 mm of travel. (unit: mm×10
-1
)
Accordingly, the relationship becomes 200/30<=100a, and no problems are posed within the
restrictions of electronic gear 1.
• The speed limit value is as follows:
500 kpps M1/D1×speed system data
75 kpps speed system data