US Digital offers a wide variety of standard rotary encoder disks. They may be ordered as a stand alone disk (see below) or as a encoder disk (see the Disks page). These rotary encoder disks are made from mylar...
The standard DISK-2 transmissive encoder disk is currently produced with a 3-hole bolt pattern cut into the disk for ID
sizes greater than or equal to .472” (12mm). This bolt circle feature will no longer be incorporated on any of our
standard DISK-2 encoder disks. The purpose of this change is to create uniformity within our standard disk selection.
Please contact us if you have interest in a custom disk with features in addition to the standard ID & OD.
US Digital offers a wide variety of standard rotary encoder disks. They may be ordered as a stand alone disk (see below) or as a encoder disk (see the Disks page). These rotary encoder disks are made from mylar polyester film. This material allows for a wide temperature range.
The maximum allowed RPM of the disk is typically limited by the maximum output frequency of the encoder module. The maximum allowed RPM is calculated as follows:
Max. RPM = (60 * Fmax) / CPR
Where Fmax = maximum encoder module output frequency and CPR is the Cycles per Revolution of the disk.
Only the No Index, EM1 Compatible option (NE) is available with the 64 CPR option. Other resolutions are available with or without an index track.
Mechanical alignment drawings for optical encoder rotary disks and optical encoder modules are available (see the EM1 and EM2 page).
US Digital designs and manufactures rotary absolute and incremental optical encoders, inclinometers and other precision motion control components used in a variety of applications including industrial automation, medical, robotics, textiles, renewable energy and more. US Digital is ISO 9001:2015 certified.