CDK500 (.5 Meter Telescope System)

Part#: 200130

Price: $47,500.00

Based on the technology of our PW-1000 (1-meter) Observatory telescope, PlaneWave combines its revolutionary optical systems with its brand new innovative L-Series direct drive mount that sets a new standard for small observatory telescopes.

Also available with Ritchey-Chrétien (RC) optics and Fused Silica glass

 

The PlaneWave Instruments CDK20 is a 20 inch (0.51 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. The CDK20 has a dual carbon-fiber truss design, with 3 cooling fans ejecting air from the back of the telescope. The CDK20 covers a 52 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 140 lbs (64 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

  New Fused Silica mirror option available on all  CDK and RC models  - 200130Q - CDK500 Fused Silica - $52,000

 

The L-Series combines versatility, simplicity and affordability by combining all the technology of our Observatory class telescopes into a compact stand-alone mount.   In its Alt/Az configuration it is considerably more compact than its equatorial counterpart, allowing a larger telescope to fit in a smaller enclosure. The mass it takes to make a rigid alt/az mount is substantially less, leading to cost savings. Unlike German Equatorial mounts, there are no meridian flips to deal with, and no  large protruding counterweights to create a dangerous hazard in a public observatory. Alt/Az is more intuitive to use and no polar alignment is needed. Besides, it is the way the pros do it!

L-Series Mounts Features:

  • Direct-drive motors on each axis for smooth, fast, and virtually silent movement of the telescope
  • Slew speeds up to 50 degrees per second
  • High resolution encoders on each axis for precise positioning
  • Zero backlash
  • Zero periodic error
  • PointXP mount modeling software
  • Enclosed electronics
  • Through the mount cabling

Designed and Manufactured in the U.S.A

FEATURES:

Direct drive motors and encoders Direct Drive motors and on-axis encoders eliminate the need for  gears, thereby eliminating backlash and periodic error. With high-resolution encoders providing the feedback for the direct drive motors, not only will the telescope track without periodic error and backlash, the mount will also counter wind gusts with precise servo feedback.  
Incredible Slew Speed The direct drive motors can move the telescope at speeds up to 50 degrees per second for tracking satellites or just to minimize target acquisition time.  
Dual mounting bracket PlaneWave style mounting bracket to hold CDK17/20 onto inside of fork arm with additional option of mounting a scope on the outside of the fork arm. Optional dovetail clamp required.  
Azimuth dovetail balance system For precise center of gravity balance whether in Alt-Az or Equatorial configuration  
Through the mount cabling Access panels in the fork arm and azimuth axis allow for camera equipment cabling through the inside of the mount.  
Proven CDK700/PW1000 Technology The L-Series uses the same proven technology as the CDK700 and 1-Meter PW1000 which are being used in Universities round the world.  


CDK-500 Package – Save $3,000!

Item Number

Description Price

CDK500

200130 CDK-500 (CDK20 / L-500) $47,500
600180 IRF90 Rotating Focuser $  4,500
200901 EFA, Focuser Accessory Control $  800
 TOTAL   $52,800

 

 

MOUNT SYSTEM

Type Alt-Azimuth / Equatorial Direct Drive Mount
Weight 257 lbs (100 kg)
Component Weights Azimuth Base - 121 lbs, Fork Arm - 136 lbs
Max. Load Capacity 200 lbs (91 kg)
Latitude Range 0 to 90 degrees, Northern and Southern hemispheres
Cable Management Equipment cables can be wired through mount

CONTROL SYSTEM

Control Electronics PlaneWave Interface dual axis telescope control
User Interface PlaneWave Interface 4 (PWI4) Control Software with integrated PointXP mount modeling software
Homing Sensors Home position sensors are included allowing the mount can find its home position on power up.
Slew Rate 20 degrees per second (standard); 50 degrees per second (maximum), both axes
Power Requirement Accepts 120 VAC. Supplied with 12VDC 15A Regulated Power Adapter

OPTICAL SYSTEM

Aperture 20 inch (508 mm)
Focal Length 3454 mm (135.98 inch)
Focal ratio F/6.8
Central Obstruction 39% of the Primary Mirror Diameter
Back Focus from Racked in Focuser 5.8 inch (147 mm)
Weight 140 lbs (63.5 kg)

MOTION CONTROL

Motor Control Industrial grade brushless motor control system and built in electronics
Motor - Azimuth and Altitude Direct Drive 3 Phase Axial-Flux Torque Motors
Encoder - Azimuth and Altitude 152mm disk built into the azimuth and altitude axes with stainless steel encoder on the circumference with reader yields 18,880,000 counts per revolution of the telescope. This translates to about 0.069 arcsecond resolution
Motor Torque Approximately 20 ft-lbs continuous; 50 ft-lbs peak
Drive Electronics Industrial grade, off-the-shelf brushless motor drives for each axis with custom designed interface card
Telescope Control Software PlaneWave Interface (PWI4). Incorporates PointXP mount modeling software by Dave Rowe All ASCOM compatible.

SYSTEM PERFORMANCE

Pointing Accuracy <10 arcsecond RMS with PointXP Model
Pointing Precision 2 arcsecond
Tracking Accuracy < .3 arcsecond error over 5 minute period
System Natural Frequency 10 Hz or greater


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