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L-Series direct drive mount system is offered in Alt-Az or Equatorial configuration. The L-Series comes in three models; the L-350 capable of holding 100 lbs;  the L-500 designed for the CDK17/20 that can hold payload of over 200 lbs. The L-600 is ideal for the CDK24 and can hold up to 300 lbs. All mounts are designed and manufactured by PlaneWave Instruments with zero backlash and zero periodic error, virtually silent motion and slew speeds of up to 50 degrees per second!


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. Unlike traditional 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! For added flexibility, the L-Series mounts can be installed in either Alt/Az, or equatorial mode with the optional wedge accessory.



  • Load capacity of 100 lbs (45 kg)
  • 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

PlaneWave L-350 Direct Drive Mount

Sales Tax Included
  • Mount System

    Type Alt-Azimuth / Equatorial Direct Drive Mount
    Weight 110 lbs (50 kg)
    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
    Swing-Through Length (From Altitude Axis) 22.5″

    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 to 240 VAC. Supplied with 120 VAC 15A IEC Type B Regulated Power Adapter.

    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 All ASCOM compatible.

    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
  • 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
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