Paper feed speed versus voltage, Aper feed speed versus voltage, Advanced printing systems – KERN & SOHN VFS 2T1 Addendum User Manual
Page 14
EPM205
- Technical reference -
Rev. A
Page 14
Advanced Printing Systems
4.2. Paper feed speed versus voltage
The following table gives the maximum paper feed speed versus the stepper motor voltage and duty cycle
for the stepper motor driving.
EPM205-LV/HS
Motor voltage
(V)
Paper feed speed
(mm/s)
Duty cycle
(%)
2.7
23
100
3
35
100
3.3
37
100
3.6
40
100
4
47
100
4.5
50
80
5
56
60
5.5
59
50
6
62
40
6.5
68
35
7
72
30
7.5
80
25
8
85
20
8.5
90
15
Notes:
· To avoid overheating the stepper motor, it is strongly advised to respect the on/off duty cycle as
indicated above (when performing continuos printing and/or paper feeding).
· The maximum period for the
ON
time is 30 seconds (when the duty cycle is not 100%).
· The Duty cycle depends only on motor voltage, so, for instance: at 6V, the paper feed speed can be less
than 62mm/s, but the duty cycle remains 40%.
To compute the off Time, apply the following formula:
onTime
DutyCycle
onTime
offTime
-
=
Example : supposing an on Time of 15s, at 6 V, from the table we obtain a duty cycle value of 40%, so:
s
offTime
5
.
22
15
100
40
15
=
-
ч
ш
ц
з
и
ж
=
On the above example, if the EPM205 works consecutively for 15 seconds, it must rest for 22.5s to allow
the motor to cool down.