SkyWalker1's specifications |
|
| Size
(excluding connectors): |
|
| • | 5.08"
x 3.29" x 1.15" (129.0mm x 83.5mm x 29.2mm) |
| Control
switches: |
|
| • | Power |
| • | System/SkyWalker-mode
select |
| Indicators: |
|
| • | Power |
| • | Programmable Mechanical Error Correction (PMEC) |
| • | Battery status |
| • | Operational
status (System/SkyWalker-mode and "Celestial Sync") |
| Internal
Time-base Accuracy: |
|
| • | +/-30ppm
from -20C to 50C ambient |
| Power
Supply (2.5mm connector): |
|
| • | 10.8VDC to 14.2VDC* |
| • | 100mA with handpaddle only and no accessories attached to the HighDrive or TCS Ports. |
| • | 2.75Amps
with HighDrive & TCS ports all at maximum load. |
| Environmental
Requirements: |
||
| • | -20C to 50C ambient | |
| • | 5%
- 95% relative humidity, non-condensing |
|
| Motor
Ports (two MJ-12): |
||
| • | Motors | |
| - | Step and Dir control signaling via 20mA current loops to external motor drivers. | |
| - | 160,000 steps/second maximum. | |
| • | Limit switches | |
| - | Normally closed contacts which open to disable motors when mount/scope move beyond safe limits. | |
| • | Index inputs for Periodic Error Correction for each axis | |
| - | Optional normally open contacts to indicate one complete rotation of worm gear. | |
| - | Required
for Periodic Error Correction programming to be available at power-up
of SkyWalker1 without retraining. |
|
| HighDrive
Port (8 pin MiniDIN): |
||
| • | 2 BiDrive outputs each capable of sourcing or sinking 250mA from each other in a push-pull configuration. | |
| - | Powered by 12VDC input power supply voltage or internal 9VDC** regulator (ideal for motorized focusers). | |
| • | 4 UniDrive outputs each capable of sinking 500mA. The 4 UniDrive outputs are limited to a total draw of 1.0Amp. | |
| - | Powered
by 12VDC input power supply voltage or internal 9VDC** regulator.
|
|
| Telescope
Control System (TCS) Port (6 pin MiniDIN): |
||
| • | Expansion
port for future Astrometric Instruments' accessories. |
|
| Autoguider
inputs (MJ-12): |
||
| • | Connects to an autoguider such as the SBIG ST-4. | |
| • | The
autoguider corrects at the currently selected SkyWalker1 pan/correction
rate. |
|
| Axial
Encoder inputs (MJ-45, used in System mode): |
||
| • | Connects optional optical encoders for closed loop operation. | |
| - | Supports standard quadrature-output encoders. | |
| - | Supports Tangent Instruments™ pin-out and Astrometric Instrument's enhanced encoder pin-out (i.e. provides axial index input for alignment from indices). | |
| • | Detects
up to 20,000 encoder quadrature transitions per second. |
|
| Handpaddle
port: |
||
| • | MJ45
(8 wire) HP1 and SkyGuide "smart handpaddle" compatible. |
|
| PC
Comm port (MJ-11, used in System Mode): |
||
| • | Three wire RS-232 interface (Txd, Rxd and GND) | |
| • | 9600 Baud, 1 Stop bit, No Parity | |
| • | 50
ft. (15m) maximum |
|
| HP1
handpaddle: |
||
| • | Included with SkyWalker1 purchase | |
| • | 14 ft (3m) coiled cord | |
| • | Powered from SkyWalker1 | |
| • | 3.60" x 5.75" x 1.20" (92mm x 146mm x 31mm) excluding cord | |
* When BiDrive outputs are powered at 12VDC, the input voltage specification changes to 12VDC +/-10%. ** Total current from the internal 9V regulator can not exceed 500mA. Back to SkyWalker1 Overview |
||
