28823 Parallax Inc, 28823 Datasheet

28823

Manufacturer Part Number

28823

Description

BOARD PARALLAX SERVO CTRLR USB

Manufacturer

Parallax Inc

Type

Motor / Motion Controllers & Driversr

Datasheet

1.28823.pdf (11 pages)

Specifications of 28823

Motor Type

Servo

Number Of Motors

Termination Style

Screw Terminal

Input Voltage

5 V

Board Size

45.7 mm x 57.3 mm

Interface Type

USB

Product

Power Management Modules

Dimensions

45.7 mm x 57.3 mm

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

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Parallax Servo Controller – USB (#28823) Rev B

16-Channel Servo Control with a USB Interface

Introduction

With the proliferation of servos used in technology today comes the obligation to manage multiple servos

each executing complex motions.

remove the burden of driving the servo pulses from the controller and thereby expand the number of

servos that one controller could be expected to handle.

successful, but for some of the more complex applications writing a textual program to control many

servos executing compounded motions and actions can be tedious to say the least.

One way to make the whole application development process easier is to change the primary interface

from a keyboard (text-based code) to that of a mouse (visual based program). By adding a USB port to

the servo controller and providing the user with a free graphical user interface, a direct link between

mouse and servo is made. Move the mouse, the servo moves in real-time. Now the task of developing a

program to control intricate servo sequences becomes a palatable, fun process.

The concept of the frame is introduced to help keep movements and sequences organized and

manageable. Sixteen servo positions and time delays make up a frame; two or more frames constitute a

sequence. Sequences may be stored as files on your PC’s hard drive to be retrieved for later use. Like a

movie, a sequence may be played, paused, stopped, or edited repeatedly until you get it just the way you

want it.

With animatronics customers in mind, the current PSCI software supports up to 128 frames. (Most

animal walking sequences require fewer than 8 frames.)

Features

Before You Begin

The processor used on the PSC-USB requires 5 VDC which is supplied by the USB port.

Servos require far more power than the USB port can supply. Therefore you must use a

separate power supply for your servos. In general, servos require 4-7.5 VDC. Be sure that

the servo power source can supply ample current at the proper voltage and will not damage

the servos.

•

Each Servo is individually controllable: Position, rate, offset, and post delay

Speed Control: Each servo may have any of 63 run-time changeable rates

128 Frames: supported though most sequences require far fewer frames

Parallax Servo Controller USB (#28823)

The original Parallax Servo Controller (#28023) was designed to

599 Menlo Drive

Rocklin, CA 95765, USA

Office: (916) 624-8333

Fax: (916) 624-8003

Web Site: www.parallax.com

Forums: forums.parallax.com

Sales: (888) 512-1024; sales@parallax.com

Tech Support: (888) 997-8267; support@parallax.com

To that end the original PSC was quite

v1.2 6/20/2008 Page 1 of 11

Related parts for 28823

28823 Summary of contents

Page 1

... Parallax Servo Controller – USB (#28823) Rev B 16-Channel Servo Control with a USB Interface Introduction With the proliferation of servos used in technology today comes the obligation to manage multiple servos each executing complex motions. remove the burden of driving the servo pulses from the controller and thereby expand the number of servos that one controller could be expected to handle ...

Page 2

... S Ch15 Ch13 Ch11 Ch9 Ch7 Ch5 Ch3 Ch1 Copyright © Parallax, Inc. PCB bottom are observing proper here, the standard servo www.parallax.com B © 2005 Ch14 Ch12 Ch10 Ch8 Ch6 Ch4 Ch2 Ch0 Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 3

... Installing the PSCI software Go to www.parallax.com and search for 28823. On the 28823 product page under Downloads, find the link for the PSC Software for PC. Once the program is downloaded, double-click on it and follow the installation instructions. Using the PSCI software Once installed, launch the PSCI software. It should start immediately and the following screen will be ...

Page 4

... To control the servos in real-time mode, connect your servos to the PSC-USB and simply slide the power switch on the PSC-USB to the ON position. Now, moving the corresponding servo position slide bar in the PSCI software positions the servo. Copyright © Parallax, Inc. If you are so inclined to witness this Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 5

... Controls are provided to facilitate the creation, controlling, and editing of animation sequences. By hovering the mouse over each control button (without clicking) a hint will pop up to help clarify the purpose of the button. Copyright © Parallax, Inc. Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 6

... To save your sequence, simply click on Sequence->Save and specify a file name retrieve your saved sequence, simply click on Sequence->Open and specify the filename. Copyright © Parallax, Inc. Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 7

... Rev B 1.4 (Initial release) No known issues with this version of firmware. Though the PSC – Serial was released with earlier versions of firmware, the PSC-USB was only released with v1.4 firmware. -------------------------------------------------------------------------------------------------------------------------------- Copyright © Parallax, Inc. Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 8

... After the preamble is sent, the command and associated parameters are sent. The eighth and final character sent is a $0D, (CR), used to terminate the string. If the command causes the PSC to reply, a three-byte reply is sent after a 1.5 ms delay. Copyright © Parallax, Inc. Parallax Servo Controller USB (#28823) v1.2 6/20/2008 Page ...

Page 9

... Constant for 2400 baud ' temporary variable ' Find and get the version ' number of the PSC. If the PSC fails to respond, you may ' Serial Data I/O pin ' Constant for 2400 baud ' temporary variable Parallax Servo Controller USB (#28823) The version number v1.2 6/20/2008 Page ...

Page 10

... CON 396 1250 SEROUT Sdat, Baud+$8000,["!SC", ch, ra, pw.LOWBYTE, pw.HIGHBYTE, CR] PAUSE 1000 pw = 250 SEROUT Sdat, Baud+$8000,["!SC", ch, ra, pw.LOWBYTE, pw.HIGHBYTE, CR] PAUSE 1000 LOOP Copyright © Parallax, Inc. Parallax Servo Controller USB (#28823) The servo v1.2 6/20/2008 Page ...

Page 11

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