APS SS205-V4+ LV - Paper Feed Speed in Voltage Control Driving Method

Advanced Printing Systems
SS205-V4+ LV - Technical Manual - Rev B Page 14
4.1. Paper Feed Speed in Voltage Control Driving Method
The following chart gives the maximum paper feed speed versus the voltage at stepper motor phases
(voltage drop in driver circuit not included)
Voltage
Paper feed
Duty cycle (%)
3
15
100
3.3
20
100
3.6
28
100
4
46
100
4.5
65
80
5
73
60
5.5
85
55
6
91
45
6.5
96
40
7*
100
35
7.5
104
30
8
110
25
8.5
113
20
In order to avoid stepper motor overheat, it is strongly advised to respect the maximum ON/OFF duty
cycle s indicated above. This is given for ambient room temperature (25°C) and may have to be
confirmed by test depending customer integration and application conditions (motor overheating is
affecting its power and torque performances). Note that the maximum period for the ON time is 30
seconds (when the duty cycle is ot 100%).
Example: since Toff = Ton*100 / Duty Cycle – Ton and maximum permissible Ton is 30s, at a
voltage f 7V, we obtain from the table a duty cycle of 35%.
Inserting these values into the formula we obtain: Toff = 30*100/35 – 30 = ~56s.
So the maximum ticket length at maximum speed is: 100*30 =3m. Then the printer must rest for 56
seconds.
There is no duty cycle limitation when using the current control (250mA).
With current control, the max speed is ~100mm/s when the current is 300mA and acceleration curve
as below.