RMS Technologies R208 DRIVER - Manual (Page 2)

RMS Technologies Page 2 Version 1.22
R208 Microstepping Driver Manual 8/31/2007
Thank you for purchasing the R208 driver. This product is warranted to be free of
manufacturing defects for one year from the date of purchase.
Technical Support for Lin Enigneering, a distributor for RMS Technologies
By Telephone: 408-919-0200
(Mon.-Fri., 8:00 a.m.-5:00 p.m.)
On the Web: www.linengineering.com
Our technical support group is glad to work with you in answering your questions. If
you cannot find the solution to your particular application, or, if for any reason you
need additional technical assistance, please call technical support at 408-919-0200.
PLEASE READ BEFORE USING
Before you start, ensure that there is a suitable DC power supply and step motor. In
addition, a suitable STEP and DIRECTION pulse source is also required.
DISCLAIMER
The information provided in this document is believed to be reliable. However, no
responsibility is assumed for any possible inaccuracies or omissions. Specifications
are subject to change without notice.
RMS Technologies reserves the right to make changes without further notice to any
products herein to improve reliability, function, or design. RMS Technologies does
not assume any liability arising out of the application or use of any product or circuit
described herein; neither does it convey any license under its patent rights, nor the
rights of others.
CHANGES TO THE R208 DRIVER BOARD
Prior to OCTOBER 1, 2005 the R208 driver board used slower opto-couplers,
limiting the step pulse timing. The old driver board also read step pulses on the
rising edge. A revision change was made on October 1, 2005, using more advanced
opto-couplers. These new opto-couplers can read faster data, yet they are also
more sensitive to older PLC step pulses. If your step pulse signal is not clear, the
R208 will pick this up and the motor will rotate “rough” and irratic. The new boards
read step pulses on the falling edge. If the falling edge of your step pulse is not a
clear signal, the motor will rotate “rough” and irratic.
So far, only a small handful of customers have been affected by the change. Mostly
those that use PLC’s from the early 90’s and older. Customers can still request the
old R208 boards in quantities of 100 per order (blanket releases are OK). The old
boards are under part number: R208-05.
New RoHS style boards: All boards sold after September 31, 2007 are RoHS
compliant. In addition to the RoHS change, the R208 has new features: to be able
to change holding current from 23% or 100% of the run current, and to change
which step pulse edge to read the pulses from: rising edge or falling edge.
Special Symbols
Indicates a WARNING and that this information could prevent
injury, loss of property, or even death (in extreme cases).