Scale Specifications
Standard and Customized Scales
MicroE Systems offers a wide array of chrome on glass scales for the highest accuracy and best thermal stability. Easy to install, standard
linear and rotary scales meet most application requirements. Customized linear, rotary, and rotary segment scales are available where need-
ed. All scales include an optical index. Mercury's glass scales save time by eliminating motion system calibrations or linearity corrections
required by other encoders, and provide better thermal stability than metal tape scales.
Options include:
•
Standard linear:
18mm - 2m
•
Standard rotary:
12mm - 107.95mm diameter, with or without hubs
•
Custom linear*:
special lengths, widths, thickness, index mark locations and special low CTE materials
•
Custom rotary*:
special ID's, OD's (up to 304.8mm), index mark outside the main track and special low CTE materials
•
Mounting of hubs for rotary scales:
MicroE Systems can mount and align standard, custom, or customer-supplied hubs
•
Rotary segments*:
any angle range; wide range of radius values
*Custom scales or rotary segments are available in OEM quantities. Contact your local MicroE Systems sales office.
Standard Short Linear Scales
130mm and Shorter
Key: inches[mm]
0.036 [0.9]
Scale Length
Measured Length
is always 5 mm less
then total length
0.250 [6.35]
End Index
Center Index
Model
Scale Length
Measured Length
L18
0.709 [18]
0.512 [13]
L30
1.181 [30]
0.984 [25]
L55
2.165 [55]
1.969 [50]
±3µm standard
±1µm available
Material
Soda lime glass
Typical CTE
8ppm/°C
Index
Center or End
L80
L105
L130
3.150 [80]
4.134 [105]
5.118 [130]
2.953 [75]
3.937 [100]
4.921 [125]
Specifications
Accuracy
Custom scales available
Standard Long Linear Scales
155mm and Longer
Key: inches[mm]
0.098 [2.5]
Scale Length
Measured Length
is always 5 mm less
then total length
0.787 [20.00]
Center Index
Specifications
Accuracy
Material
Typical CTE
Index
End Index
±5 µm <1m
±5 µm/m >1m
Soda lime glass
8ppm/°C
Center or End
Model
Scale length
Measured length
L155
6.102 [155]
5.906 [150]
L225
8.858 [225]
8.661 [220]
L325
12.795 [325]
12.598 [320]
L425
16.732 [425]
16.535 [420]
L525
20.669 [525]
20.472 [520]
L1025
L2025
40.354 [1025] 79.724 [2025]
40.157 [1020] 79.528 [2020]
Custom scales available
All Specifications are subject to change. All data is accurate to the best of our knowledge.
MicroE Systems is not responsible for errors.
Page 9 of 10
MICROESYS [ GSI Group, Inc. ]
