Yaskawa SGDH Linear Sigma Series - Manual (Page 48)

2 Selections
2.6.5 Linear Scales
2-14
2.6.5 Linear Scales
Note: 1. The linear scale signal is multiplied by eight bits (256 segmentation) inside the serial converter
unit.
2. Using the zero-point signal with a linear scale made by Renishaw Inc. may cause a deviation in
the home position. If so, adjust the setting so that the zero-point is output only in one direction
by using BID/DIR signal.
3. This list does not cover all the applicable types of linear scales. And, the linear scales listed in
the table may not be applicable or available if their specifications have been modified or their
production has been stopped.
Check the most recent catalog of the linear scale manufacturer to select a linear scale that meets
the specifications described in 5.1 Serial Converter Unit Specifications.
4. Select a linear scale so that the current consumption of the linear scale is 190 mA max.
5. At parameter (Pn280), set the scale pitch of the linear scale so that it satisfies the following con-
dition. Otherwise, satisfactory control cannot be obtained.
Manufacturer Type Output Signal
Resolution
(
μm/pulse)
Scale Pitch
( μm)
Max. Value
of Encoder
Output
Resolution
(Pn281)
Max. Speed of
Applicable Linear
Servomotor
(m/s)
Renishaw Inc. RGH22B
1Vpp
Analog voltage
0.078 20
31 5
63 4
127 2
255 1
Heidenhain
Corp.
LIDA187 0.156 40
63 5
127 4
255 2
LIDA487
LIDA489
0.078 20
31 5
63 4
127 2
255 1
LIF181 0.016 4
31 1.0
63 0.8
127 0.4
255 0.2
64000
must result in an integer number
Pn280(Scale pitch ( μm))
Examples
Correct: 1,2,4,8,10,16,20,40
Incorrect: 3,12,18