|
|
|
|
|
09/02/2006
 Email to a friend
 Comment on this article
|
Tom Shelley reports on a technology that solves a whole bunch of encoder problems at the same time
Magnetic chip encoders can measure angles to fractions of a degree for only a few euros each.
Not made in China but Slovenia, under part British ownership, the latest devices from RLS in Ljubljana form a range of products that set new standards for low cost position sensing devices.
The RMB kit encoders, as they are designated, use a 4mm magnet and 64 Hall detectors contained with an integrated circuit mounted on a small PCB that may be no more than 20mm in diameter. According to sales and marketing manager Tom Mackintosh, they can be supplied as bare chips "For a few euros", as PCB units, or as sealed units suitable for use in the food industry.
Unlike conventional optical encoders that have seals that can fail over time, these encoders use a non-contact design that ensures long term reliability, as well as being much more rugged and giving an absolute readout from the basic device. Resolution is to 12 bits which translates to better than 0.08 degrees.
Standard products include the AM256 that produces industry standard absolute, incremental and sinusoidal outputs, with 8-bit resolution for absolute positioning and giving 64, 128 and 256 incremental counts per revolution. The AM512B has 9-bit resolution and 512 counts per revolution incremental while the AM8192 resolves to 13 bits, 8192 counts per revolution incremental. Depending on resolution, speeds of up to 60,000 rpm can be achieved. Applications include resolver replacement in brushless DC motors using the AM256 and pan and tilt control in security companies. RLS is part owned by Renishaw.
RLS merilna tehnika d.o.o.
|
|
| |
Author
Tom Shelley
|
| |
| |
This material is protected by Findlay Media copyright 2012.
See Terms and Conditions.
One-off usage is permitted but bulk copying is not.
For multiple copies contact the sales team.
|
| |
|
|
| |
To comment on news stories or blogs you need to complete our 60 second registration
process. Once completed this then allows you to download any and all white papers,
register for e-zines and access our detailed supplier directory for FREE.
If you are all ready a registered user then enter your e-mail address and login.
You will need to have logged in prior to entering your comments in the boxes provided.
|