Specifications

3-12
(2) Acceleration Control
When driving the motor, acceleration control is needed to start paper feeding. When the motor is to be
driven at the motor drive frequency that is calculated using equation (1), the motor may come out of step
under heavy load.
Drive the motor to the maximum driving speed that is calculated using equation (1), according to the linear
acceleration table in Table 3-5.
The method for accelerating the motor is as follows:
1. Output start step (5780 (µs)).
2. Output first step for the first acceleration step time
3. Output second step for the second acceleration step time
4. Output n
th
step for the n
th
step acceleration time
5. After outputting the time calculated using equation (1), the motor is driven at a constant speed.
The printer can print during acceleration.
Set the maximum drive speed to 300 pps (3333 µs) for printing at lower than -5°C.
When accelerating it again after decreasing the speed, follow the method shown below.
When the step time is Tm (the reciprocal number of the frequency calculated using equation (1)),
compare Tm with the time that was taken in the previous step.
(1) In case Tm > time that was taken in the previous step (i.e. decreasing speed)
the closest acceleration step time to Tm and the acceleration step time that is larger thanTm, are
output.
(2) In case Tm < time that was taken in the previous step (i.e. reacceleration time)
the next closest acceleration step time to the previous step time or Tm, which is longer, is output.