Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
3-1
Supplementary Conditions
3
3.1 3.1 Large traverse range
Notes on uniqueness of encoder position
Linear absolute encoder
The absolute value of linear position encoders, e.g., Heidenhain LC181, is always unique for
the scale lengths available.
Rotary absolute encoder
The absolute value of rotary absolute encoders is only unique within the range of the specific
maximum encoder revolutions.
For example, the EQN 1325 rotary absolute encoder by Heidenhain supplies a unique
absolute value in the range of 0 to 4,096 encoder revolutions.
Depending on how the encoder is connected that will result in:
• Rotary axis with encoder on load: 4096 load revolutions
• Rotary axis with encoder on motor: 4096 motor revolutions
• Linear axis with encoder on motor: 4096 motor revolutions
Example:
An EQN 1325 rotary absolute encoder is connected to the motor of a linear axis. For an
effective leadscrew pitch of 10 mm this will result in a unique absolute value within the travel
range -20.48 to +20.48 m.
To Next Page
Loading...
Need help?
General
