RTP (Rotating Top Platform)

1. No Center Shaft to top platform. Four axis of motion.

(a) Signal cables don't wrap around a shaft even on units without slip rings.

(b) 540 degrees of azimuth rotation (PT Housing) without the use of slip rings.

(c) More room inside the unit for larger slip ring housings if continuous rotation is

required. (Optional Slip Ring)

(d) Top platform can remain locked to pedestal base or can rotate up to

360 deg/sec . Continuous rotation or sector scan can be used for radar applications. RTP can be commanded to any position without regard to PT housing position.

2. Independent control of two elevation platforms. Platforms can be locked/unlocked via host commands. If RTP is locked to PT housing it will track movements of the PT housing. If locked to the pedestal base it will remain stationery. All modes are controlled from the host controller.

The RTP unit is designed to keep the center top platform aligned with the base when needed or move to any position. Continuous rotation or sector scan for the top platform is all under host command. This is useful for radar and similar type payloads. Unlike other manufactures the Burchfield RTP unit has no center shaft through the unit. This eliminates the wrapping of the signal cables around the center shaft on units without slip rings. This design allows for 540 degrees of rotation in azimuth without the use of slip rings. It also allows room inside the unit for larger slip ring housings on units designed for continuous rotation of the PT housing.

General Specifications

Max Payload Elevation                       85lbs on each elevation arm.

Max Payload RTP (center)                 100 lbs

Azimuth Angular Range                      540 deg without slip rings

Azimuth Angular Range  (option)      Continuous rotation with slip rings

Elevation Angular Range                   360 deg

RTP Angular Range                           360 deg continuous rotation

Independent Elevations                     Separate control or Locked together thru host

Max Velocity Azimuth                        60 deg/second

Max Velocity Elevations                    45 deg/second

Max Velocity RTP                              360 deg/second

Encoder Resolution Elevation          .000254 degrees

Encoder Resolution Azimuth            .000318 degrees

Encoder Resolution RTP                  .000254 degrees

Continuous Torque Elevation           135 ft-lbs

Continuous Torque Azimuth             102 ft-lbs

Continuous Torque RTP                   102 ft-lbs

Backlash                                            Zero Backlash Harmonic Drives^TM

Angular Accuracy                              Better than .01 deg

Angular Repeatability                       Better than .005 deg

Weight                                                65 lbs

IP Rating                                            IP67

Material                                              Aluminum Housing with Stainless Steel Fasteners

Temperature Range                         -40 to +85 deg C

Motors                                                Brushless Servo Motors

Communications

RS-232, RS-485, CAN, Ethernet,  Device Net

Power Requirements

24 to 48 VDC @ 5 amps

Payload Control inside Pan/Tilt

All internal electronics can be controlled and interrogated from host thru main communication channel. No need to pull separate communication lines for payloads.

4 RS-232 ports

3 RS-485 ports

24 I/O points can be assigned as Digital IN digital OUT or Analog IN

4 External Encoder inputs

Options

Stabilization (see Stabilization Module Specs.)

Add on Elevation axis for RTP. (See Elevation Module specs)

Click here to download specifications...