ETEL Doc. - Operation & Software Manual # DSC2P 903 / Ver. F / 3/6/05
Chapter E: Appendixes
Operation & Software Manual
Direct Drives & Systems
357
20.
Units conversion
The controller does not accept ISO unit values system (meter, kilogram, amp, second) but those from a system
with
increment
. In this chapter, the conversion formulae are given to calculate an increment value from an ISO
one and inversely. First, the
cinematic
quantities such as distance, speed, acceleration and jerk will be looked
at and then
time
quantities units.
20.1 Cinematic quantities units
There are always two cinematic quantities systems side by side in the controller. The first is the user increment
[ui], and the second is the drive increment [di]. Some values have to be given in user increment and others in
drive increment. All internal calculations done by the controller are in drive increment because the resolution is
better.
In the next part of the manual, the different cinematic quantities are abbreviated like described in the following
table, otherwise the complete conversion formula will be given from case to case.
Remark:
Read also §13.3.10 about parameter
K50
for units scales definition.
Offset between [dpi] and [upi]: [upi] = ([dpi] + M4) / 2
K50
Notation
Signification
Equivalent in the ISO system
Lin
ear mo
tors
[upi]
User Position Increment
[m]
[usi]
User Speed Increment
[m/s]
[uai]
User Acceleration Increment
[m/s
2
]
[dpi]
Drive Position Increment
[m]
[dsi]
Drive Speed Increment
[m/s]
[dai]
Drive Acceleration Increment
[m/s
2
]
R
o
ta
ry motors
[rupi]
Rotary User Position Increment
[turn]
[rusi]
Rotary User Speed Increment
[turn/s]
[ruai]
Rotary User Acceleration Increment
[turn/s
2
]
[rdpi]
Rotary Drive Position Increment
[turn]
[rdsi]
Rotary Drive Speed Increment
[turn/s]
[rdai]
Rotary Drive Acceleration Increment
[turn/s
2
]
Содержание DSC Series
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