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CDK350 Observatory System

Original price $25,500.00 - Original price $25,500.00
Original price
$25,500.00
$25,500.00 - $25,500.00
Current price $25,500.00
SKU 140130Q

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Description

Enjoy exceptional optical and tracking performance for astrophotography, or research, with the CDK350 package! Includes a CDK14 optical tube and L-350 mount.

The PlaneWave Instruments CDK14 is a 14 inch (0.35 m) f/7.2 Corrected Dall-Kirkham Astrograph telescope. The CDK14 has a dual carbon-fiber truss design, with 3 cooling fans ejecting air from the back of the telescope, and 4 fans blowing across the boundary layer of the mirror's surface. The CDK14 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 48 lbs (21.8 kg) and comes standard with a backplate retaining ring ready to accept the focuser of your choice.

CDK14 optical tube:

  • f/7.2 and 2563mm focal length No coma, no off-axis astigmatism, and no field curvature.

  • Pinpoint stars across a 70mm image circle.

  • Rock solid fused silica mirrors with low thermal expansion.

  • Carbon fiber optical tube assembly for rigidity and fast cooling.

  • Simple secondary mirror collimation thanks to the fixed primary mirror.

L-350 direct drive mount:

  • Zero periodic error, zero backlash, and minimal maintenance due to the lack of gears.

  • Slew speeds up to 50 degrees/sec for satellite tracking and fast target acquisition

  • Sidereal tracking accuracy of < 0.30 arcseconds RMS over 5 minutes.

  • High resolution optical encoders on both axes for precision feedback. Can be installed in either equatorial, or alt/az configuration.

  • Includes PWI4 software (ASCOM compliant) for mount control.

All CDK14 telescopes come with fused silica primary and secondary mirrors. 

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 Mount 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 modelling software

  • Enclosed electronics

  • Through the mount cabling


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.  

 

Specifications

Mount System

Type Alt-Azimuth / Equatorial Direct Drive Mount
Weight 110 lbs (50kg)
Component Weights Azimuth Base – 40 lbs, Fork Arm – 70 lbs
Max. Load Capacity 100 lbs (45 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 14 inch (355 mm)
Focal Length 2563 mm (100.9inch)
Focal ratio F/7.2
Central Obstruction 23.7% by surface area; 48.6% of the Primary Mirror Diameter
Back Focus from Mounting Surface 11.09 inch (281.6 mm)
Weight 48 lbs (48 kg)
Optimal Field of View 70mm Image Circle

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 stainless steel encoder ring with reader built into the azimuth and altitude axes. 18,880,000 counts per revolution (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. Provides HTTP and ASCOM control interfaces.

System Performance

Pointing Accuracy <10 arcsecond RMS with PointXP Model
Pointing Precision

2 arcseconds at sidereal velocity

Tracking Accuracy

< 0.3 arcseconds over a 5 minute period at sidereal velocity

System Natural Frequency 10 Hz or greater
Downloads

L-350 Pier Interface Drawing

L-350 Mount Dimensions

PlaneWave Interface 4 Software User Manual_V15 1.7.2021

L-350 Mechanical Installation Guide

Included Items
Heating elements for dew prevention The heating pads on the primary and secondary mirror require the 600195 Delta-T controller sold separately
OTA Cover To protect the primary mirror and inside of the optical tube
Flashdrive Contains software and instructions for collimation and spacing the primary to secondary mirror
Hardware Six 3/8-16 x 1/4″ socket head cap screws to bolt the mount to the pier, or wedge

 

Six 3/8-16 x 1/4″ washers

One extended length shoulder bolt for RA axis to EQ wedge alignment

One 16′ USB cable To connect the mount to the observatory control computer
One 120VAC power cable To provide power to the mount
Standard Allen Key set For tightening bolts used on the mount
Flashdrive Contains PWI4 software for mount control and instructions for installation
Gamepad Used for control of the mount tracking speeds for visual observing
Recommended Accessories

Mounting Bracket for Finderscopes (125360)

Finderscope and Mounting Bracket (200985)

Delta T Heater Part (600195)

EFA Kit Electronic Focuser (240901)

Keller EZ Saddle (600182)

Light Shroud CDK14 (140970)

Piggyback Dovetail Bar (140990)

Hendrick Focuser (200340)

IRF90 – Integrated Rotating Focuser (600180)

Counterweight Accessory for CDK14 (200150)

Portable Rolling for Pier Mounts (600128)

Equatorial Wedge, L-350 Mount (600565)