Difference between revisions of "Heavy Duty Pan and Tilt"

Revision as of 21:38, 11 October 2016

September 2016

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Contents 1 Introduction 1.1 Tilt Configurations 1.2 Deck Mount Configurations 1.3 Parts and Specifications 1.3.1 Parts 1.3.2 Weights and Measures 1.4 Parts Preparation 1.4.1 Servo Plate/Lower Deck Mount 1.4.2 Bearing Plate/Upper Deck Mount 1.4.3 Turret Base 1.4.4 Servo Coupler 1.5 Assembly 2 See Also 2.1 Project 3D Print Files 2.2 Some of the Vendors I used for this project 2.3 Comments? Questions?

Mounted on my big Talon

Introduction

When I decided to put together a pan set-up for my big Talon to carry a 2 axis brushless gimbal, I went looking for components that I could buy to build a stout 360+ degree pan mechanism that didn't need gears, belts or extra linkage parts and I found the components I needed in a company called Actobotics. This project then is an extension of that earlier work on my big Talon and some of the work I put into the Mini Talon.

After buying and building several Pan and Tilt set-ups I got tired of how cheaply the purchased ones were and how flimsy most were. The biggest problem has always been the pan axis is simply never robust enough. When I did find something that was strong enough (for me) it was always too heavy and too expensive or presented too much wind area.

With the Actobotics Pieces, their Futaba servo coupler and bearing plate, I was able to build a raised bearing that made the servo connection very strong. This structure keeps all the stresses off the servo shaft and its bearings and elliminates unwanted motion or wobble.

Base unit showing Coupler and Bearing plate

I've added to this a turret and tilt mechanism which I have modified many times.

Tilt Configurations

Because I always seem to need something different for every plane I've ended up with several versions of this idea. Most of my planes only require the ability to look down and around so there are three different camera mount plates.

• Standard Modius/Runcam mount
• Dual Side-by-Side Camera Mount
• Misc Camera mount
  
  

Three Standard Camera Mounts

Added to this I have made two different height turrets, one for the three mounts above and one for a tilt which looks both up (20 deg) and down (-42 deg). This one also has a over-under camera mount for a Mobius/Runcam and an HS1177 camera. The dual camera set-up should work well with head tracking but the pan speed may be a little slow.

Short and Tall Turrets

Range of Motion 0 to 70 Degrees                  Range of Motion -20(up) to 42(down) Degrees

Single and Dual Camera set-ups

Deck Mount Configurations

I designed three different ways to mount it to a deck. The first deck plate which incorporates the bearing mount puts most of the unit below the deck.

With top deck-mount plate

The second deck plate replaces the servo mount and puts the tilt mechanism up higher. This would be used when you don't have a lot of depth under the deck.

With lower deck-mount plate

The last method is to simply drill the airframes deck to fit around the standard servo or bearing plates.

With no deck-mount plate

Parts and Specifications

Parts

Bottom Unit Printed Parts

• GWS Servo Plate
• GWS Servo Deck Plate
• Bearing Plate
• Bearing Deck Plate

Top Unit Printed Parts

• Tall Turret
• Short Turret
• Std Mobius Mount
• Std Dual Camera Mount
• Std Misc Camera Mount
• Over-Under Camera Mount

Servos

Pan - GWS S125-1T (25 tooth)

Tilt - 9g/120 Degree servo

Hardware

2x M3 x 20mm Nylon PHS

4x M3 x 8mm SHCS

6x M3 Flat Washer

4x M2.5 x 8mm SHCS

4x M2.5 Flat Washer

4x M2 x 6mm SHCS

4x M2 Flat Washer

4x M3 x 15mm Aluminum Stand-offs

1x Actobotics Servo Coupler - 25 tooth

1x 0.375"ID x 0.625"OD x 0.156"L Ball Bearing

3" 0.047" Steel Wire

Weights and Measures

Total weight with all hardware and a true 9g tilt servo - 93 grams

Total weight without servos - 32 grams

Pan rotaion - 385 degrees

Tilt range, single camera - 0-70 degrees (down)

Tilt range, dual camera - -19 (up) to 45 degrees (down)

Parts Preparation

On any 3D print project, part preparation is key to a successful completion. The following images show what work needs to be done for this success.

Servo Plate/Lower Deck Mount

The servo mount needs 4 holes tapped to M3 and 4 holes tapped to M2.5:

Bearing Plate/Upper Deck Mount

The assumption is your printer (or service) will hold the tolerance designed on an inside diameter. If your printer adds too much material you will need to make adjustments to accommodate the bearing OD which should push in with a little resistance:

Turret Base

The Turret needs 2 holes tapped to M3 and 2 holes tapped to M2:

Like the bearing plate, the assumption is your printer (or service) will hold the tolerance designed on an inside diameter. If your printer adds too much material you will need to make adjustments to accommodate the coupler OD (0.375") which should push in with a little resistance:

Servo Coupler

The Servo Coupler needs 2 holes drilled and tapped to M3:

Assembly

On the Camera Mount pivot use the two Nylon M3 screws cut down so that they tighten against each other without jamming the pivot points.

Upper unit assembly

Lower unit assembly

See Also

Project 3D Print Files

The following are the 3D print ZIP files used in this specific build. For more versions and information, please see my Thingiverse postings here:
Mark_q Thingiverse Designs

• Project Layout Drawings
• Project STL Files
• Heavy Duty Pan & Tilt

Some of the Vendors I used for this project

ServoCity

Comments? Questions?

email me!