Difference between revisions of "Geared Aerodynamic Pan and Tilt"

Revision as of 11:49, 1 March 2018

February 2018

Contents 1 Introduction 1.1 Configurations 1.1.1 Notes on Standard Configuration 2 The Build 2.1 Parts and Specifications 3 The Build 3.1 3D Parts 3.1.1 Base Plate 3.1.2 Bearing Support Plate 3.1.3 Turret Base 3.1.4 Tilt Plate 3.1.5 Slide Covers 3.2 Mechanical Parts 3.3 Assembly 3.4 A Video Sample 4 See Also 4.1 Project 3D Print Files 4.2 Where to buy the parts 4.3 Comments? Questions?
	Aerodynamic and Accurate!

Introduction

Having designed and released a pile of different Pan and Tilt units I decided to try and make something a little different. I came up with a list of simple design goals that were based on requests and experiences with other PnT's. The list then, in order of my importance is:

• Lighter and Faster than my HD Pan and tilt which is around 100g

- New weight is ~80g with the components shown here

• Is smooth and precise with excellent centering

- With a new fully programmable digital Hitec HS-5245MG servo, it is extremely smooth and centers beautifully

• Is more aerodynamic

- Now with both servos mounted below the deck, it is very aerodynamic

• Can be made from off-the-shelf components

- All but one component is made from standard off-the-shelf parts (see text)

• Rotates 360° or more

- Rotation can be programmed from 236° to 398°

• Tilts down 50 degrees or more

- Tilts down 42° (see text)

NOTE Apologies to all followers in Europe and Australia! The components selected started with a new (awesome) drive gear from ServoCity.com which I know can be very hard to find outside the US. This new drive gear comes with the Hitec C1 spline already molded in which made the design and subsequent build much easier. Of course this also means the gear shaft and bearings are also imperial dimensions.

The new unit has a lower profile than the HD unit and needs a smaller through-deck hole:

HD and Aerodynamic Pan and Tilts

Configurations

For this project I decided to keep it simple so there is only one pan-only setup and one tilt setup. I will likely add a custom RunCam Split deck like I have done on my Offset Pan and Tilt in the future.

Pan-only and Tilt decks

Notes on Standard Configuration

• TBA

The Build

TBA

Parts and Specifications

The parts shown here are what was used on the unit when released. This list can change over time as i look for ways to improve it.

Print Parts

• Base Plate
• Bearing Support Plate
• Tilt Servo Mount Bracket
• Tilt Turret
• Tilt Deck
• Tilt Deck Slide Covers
• Pan Deck

Off the Shelf Parts

• 2x Dubro #107 1/2A Control Horns (one pair)
• 1x Dubro #109 2-56 Spring Steel Kwik-Link Clevis
• 1x Dubro #172 2-56 Threaded Rod
• 1x Pushrod Linkage Stopper D2.1mm
• 1x ServoCity #RSA32-2HS-26 32 pitch/26 tooth Acetyl Servo Gear - C1 Spline
• 1x ServoCity #SPBD32-34-16 32 pitch/16 tooth Acetyl Plain Bore Gear
• 2x ServoCity #535018 .250"ID x .375"OD x .125"L Non-Flanged Ball Bearing w/Dual Shield

Hardware

• 4x M2.5x6mm Machine screws, Stainless Steel
• 4x M2.5 Flat Washers, Stainless Steel
• 8x M3 x 6mm Machine Screw, Aluminum
• 3x M3 x 10mm Stand-off, Aluminum
• 1x M3 x 30mm Machine Screw, Stainless Steel
• 1x M3 Nylok Nut, Stainless Steel
• 2x M2 x 8mm Machine Screw, Stainless Steel
• 2X M2 Hex Nut, Stainless Steel
• 2x M2 x 4mm Machine Screw, Stainless Steel
• 6x M2 x 5mm Flat Head Machine Screw, Steel
• 1x M2 Flat Washer, Stainless Steel

Servos

• Pan - Hitec HS-5245MG digital programmable Mini Servo (32g)

• Also needed - Hitec HPP-21 PC Digital Servo Programmer

• Tilt - Corona DS929MG digital micro servo (14.1g)

NOTE: This project was designed specifically around the two servos shown

Mechanical Specifications

• Total weight with all hardware shown - 89 grams
• Pan rotaion - 236 - 398 degrees
• Tilt range - 0-42 degrees (down)

The Build

On any project such as this, understanding the work scope and finding the resources needed is a key to success. For the full tilt version there are 6 3D print parts that require some detail work and one aluminum gear shaft that will require some machining.

3D Parts

It is important here to makes sure your printer is calibrated for the filament you have selected as there is a critical dimension to interface the two gears. If you don't know whether your printer is calibrated, create or download a 20mm test cube, print it, and measure the results. If the test cube is within 0.25% (19.95mm to 20.05mm))or better of 20mm, then you are OK. If not, go through the calibration process on your printer or scale the print to fit.

Base Plate

The base plate and bearing support plate are designed so the ball bearing just pushes in. If the bearing is to tight, a dremmel sanding tube can be used to open it up. If the bearing hole is too loose, small strips of cellophane tape can be used to tighten it up.

The base plate needs the 4 servo mount holes tapped to M2.5 and the 3 bearing support holes tapped to M3. An alternative to the M2.5 is to use four M2 x 8mm machine screws and large flat washers.

Bearing Support Plate

The support plate needs the three 3mm holes cleaned up with a 3mm drill bit and the bearing bore checked for fit.

Turret Base

The Turret needs 4 holes cleaned up to 3mm and the bottom interface hole cleaned up to .250" (6.35mm)

Tilt Plate

The Tilt plate needs 6 holes cleaned up for the M2 x 5mm flat head screws and the pivot holes cleaned up to 3mm.

Slide Covers

The slide covers need their 3 holes tapped to M2. Alternatively you could glue these plates on.

Mechanical Parts

xxx

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

A Video Sample

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
• New Servo Coupler STL file
• Thingiverse - Heavy Duty Pan & Tilt

Where to buy the parts

• For the bearing and servo coupler -

In the US - ServoCity

In Europe - StepLab

• For the GWS S125-1t 25t servo -

Global - GWS S125-1t Servo

Comments? Questions?

• email me!