Smart Avionics PB-4 Manuale utente

PB-4 Propeller & Rotor Balancer

User Interface Manual

Smart Avionics Ltd.

17/07/2019www.smartavionics.comRevision: 2.4

PB-4 Propeller & Rotor Balancer: User Interface Manual

Revision: 2.4

Publication date 17/07/2019

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Table of Contents

1. Introduction ................................................................................................... 1

1.1. Accessing the PB-4 user interface .................................................... 1

1.1.1. Accessing the PB-4 user interface (AP mode) ...................... 1

1.1.2. Accessing the PB-4 user interface (STA mode) .................... 1

1.2. Initial screen ....................................................................................... 2

1.3. Jobs .................................................................................................... 3

1.4. Menu button ....................................................................................... 4

1.5. Connect button .................................................................................. 4

2. Polar Tab - Propeller Balancing ................................................................... 7

2.1. Polar chart .......................................................................................... 7

2.1.1. Capture button ......................................................................... 9

2.2. Points list ............................................................................................ 9

2.3. Option buttons ................................................................................. 10

2.3.1. Print Polar Chart menu ......................................................... 10

2.3.2. What Next? button ................................................................ 10

2.3.3. Show Waveform button ........................................................ 11

2.3.4. Polar Options button ............................................................. 11

2.4. Point details dialog .......................................................................... 11

3. Polar Tab - Rotor Balancing ....................................................................... 15

3.1. Polar chart ........................................................................................ 15

3.1.1. Capture button ...................................................................... 16

3.2. Points list .......................................................................................... 17

3.3. Option buttons ................................................................................. 18

3.3.1. Print Polar Chart menu ......................................................... 18

3.3.2. What Next? button ................................................................ 18

3.3.3. Show Waveform button ........................................................ 19

3.3.4. Polar Options button ............................................................. 19

3.4. Rotor mode profiles ......................................................................... 20

3.5. Point details dialog .......................................................................... 21

3.6. Rotor balance solution dialog ......................................................... 23

3.7. Edit move line dialog ....................................................................... 24

3.7.1. Defining move line nodes ..................................................... 25

3.8. Changing adjustment settings ........................................................ 26

4. Spectrum Tab ............................................................................................. 29

4.1. Spectrum display ............................................................................. 29

4.1.1. Capture button ...................................................................... 31

4.2. Lines and spectra lists ..................................................................... 31

4.3. Option buttons ................................................................................. 32

4.3.1. Print Spectrum button .......................................................... 32

4.3.2. Spectrum Options button ..................................................... 32

5. Data Tab ...................................................................................................... 35

5.1. Data Options button ........................................................................ 35

6. Options Page .............................................................................................. 37

6.1. Change to another job ..................................................................... 37

6.2. Create a new job .............................................................................. 37

6.3. Rename the current job ................................................................... 38

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6.4. Delete jobs ........................................................................................ 38

6.5. Save / restore PB-4 data ................................................................. 38

6.6. PB-4 configuration ........................................................................... 39

6.6.1. Set access point details ....................................................... 39

6.6.2. PB-4 hardware configuration ............................................... 39

6.6.3. Get / set configuration values .............................................. 40

6.6.4. Firmware upload ................................................................... 41

6.7. Upload UI files .................................................................................. 41

6.8. Set PB-4 IP address ......................................................................... 42

7. Propeller Balancing .................................................................................... 43

7.1. Minimising other sources of vibration ............................................ 43

7.2. Propeller mass imbalance .............................................................. 43

7.3. Static propeller balancing ............................................................... 43

7.4. Dynamic propeller balancing .......................................................... 44

7.5. Taking a vibration reading ............................................................... 45

7.6. Balancing procedure ........................................................................ 46

7.7. After balancing ................................................................................. 48

7.8. Troubleshooting ............................................................................... 48

7.8.1. The displayed RPM is erratic or wrong ................................ 48

7.8.2. The current polar point position varies widely .................... 48

7.8.3. Adding weight does not reduce the vibration level ............. 49

8. Rotor Balancing .......................................................................................... 51

8.1. Causes of rotor vibration ................................................................. 51

8.2. Rotor adjustments ........................................................................... 52

8.3. Balancing procedure ........................................................................ 53

8.3.1. Measuring the effect of adjustments .................................. 54

8.3.2. Creating move lines .............................................................. 55

8.3.3. Obtaining the balance solution ............................................ 55

9. Two Plane Balancing .................................................................................. 57

9.1. Two plane balancing method .......................................................... 57

9.1.1. Measurement and correction planes ................................... 57

9.2. Two plane balancing dialog ............................................................ 58

9.3. Balancing procedures ...................................................................... 59

9.3.1. Single accelerometer procedure .......................................... 60

9.3.2. Dual accelerometer procedure ............................................. 60

A. PB-4 Configuration Values ........................................................................ 63

B. User Interface Configuration ..................................................................... 65

B.1. Editing rotor profiles ........................................................................ 66

B.2. Editing other values ......................................................................... 67

Index ................................................................................................................ 69

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PB-4 Propeller & Rotor Balancer

List of Figures

1.1. Initial screen ............................................................................................... 3

2.1. Polar tab - propeller balancing (with options visible) .............................. 7

2.2. Polar chart - propeller balancing .............................................................. 8

2.3. Points List Header - Propeller Mode ........................................................ 9

2.4. Set Weight Amounts And Positions Dialog ........................................... 10

2.5. Point details dialog - propeller mode ..................................................... 12

3.1. Polar tab - rotor balancing (with options visible) .................................. 15

3.2. Polar chart - rotor balancing ................................................................... 16

3.3. Points List Header - Rotor Mode ............................................................ 17

3.4. Span Adjustment Dialog ......................................................................... 18

3.5. Add Move Line Menu .............................................................................. 19

3.6. Standard accelerometer orientation (top view) ..................................... 21

3.7. Point details dialog - rotor mode ............................................................ 22

3.8. Rotor balance solution dialog ................................................................. 23

3.9. Edit move line dialog ............................................................................... 24

3.10. Span Adjustment Settings .................................................................... 26

4.1. Spectrum tab (with options visible) ....................................................... 29

4.2. Rotor spectrum with line info box .......................................................... 30

5.1. Data tab (with options visible) ................................................................ 35

6.1. Options page (when connected to PB-4) ............................................... 37

6.2. Accelerometer orientation during calibration ........................................ 40

7.1. Sine wave ................................................................................................. 44

8.1. Rotor spectrum with large × 2 peak ....................................................... 51

8.2. Rotor Adjustments .................................................................................. 53

9.1. Two plane balancing an object supported at both ends ....................... 58

9.2. Two plane balancing an overhung object .............................................. 58

9.3. Two plane balancing dialog .................................................................... 59

B.1. UI configuration dialog ........................................................................... 65

B.2. Example profile configuration ................................................................ 66

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Chapter 1. Introduction

This manual describes the PB-4's browser based user interface and how to

use it to balance a propeller or rotor. Please refer to the PB-4 Hardware Manual

(pb4_hw_manual.pdf) for information regarding the PB-4 hardware and how

it is installed prior to carrying out a balancing job.

For simplicity, this manual refers to the user interface as a tablet but it could

be any device that supports a modern web browser and it talks about “clicking”

buttons. Obviously, if the device has a touch screen then you will be “touching”

or “tapping” rather than clicking.

This manual describes the PB-4 user interface software version 2 upwards.

Note

In depth tutorials that cover propeller and rotor balancing using the

PB-4 are available on the Smart Avionics website.

1.1. Accessing the PB-4 user interface

Safari users please note that the PB-4 is not compatible with Safari's “Private

Mode”.

Accessing the PB-4 user interface from your tablet's browser requires the

PB-4 and the tablet to be using the same Wi-Fi network.

1.1.1. Accessing the PB-4 user interface (AP mode)

When the PB-4 is in AP mode, the Wi-Fi network name (SSID) will be PB4-XX

where XX are two letters/digits. You will need to tell your tablet to use that

Wi-Fi network (via its Wi-Fi configuration). At the airfield, the tablet will probably

use the PB-4 Wi-Fi automatically because your normal Wi-Fi is not available.

If not, you will have to tell the tablet to use the PB-4 Wi-Fi manually.

Once the tablet is using the PB-4 network, you can load the user interface

page into the browser. If your tablet supports MDNS, you can simply use

pb4.local as the host name in the browser. Apple devices (mac/ipad/iphone)

and most Linux systems have MDNS, most Windows systems do not. If not,

use the IP address 172.21.21.1. Having accessed the PB-4 user interface

page, just add a bookmark for that page in your browser called something like

"PB-4 AP Mode (at the airfield)".

1.1.2. Accessing the PB-4 user interface (STA mode)

When the PB-4 is in STA mode, the Wi-Fi network name (SSID) will be whatever

you normally use at the current location. The PB-4 will need to be taught that

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SSID and the associated password. The PB-4 supports WPS for automatically

obtaining the SSID and password from the access point which is quick and

easy if the access point also supports this feature. Alternatively, you can

manually enter the credentials by starting the PB-4 in AP mode, loading the

user interface into your browser (as described above), connecting to the PB-4

(click on red button) and then going to Menu / Options / PB-4 Configuration

/ Set Access Point Details.

Once the PB-4 is able to connect to the local network, you can load the user

interface page into the tablet's browser. Again, if MDNS is supported by the

tablet, the host name pb4.local can be used. Otherwise, you need to find out

the IP address that has been assigned to the PB-4 by the access point. Follow

these steps:

1. Turn on the PB-4 in STA mode (press the on/off switch until LED 2 goes

green). When you release the switch, LED 2 will go off and then after a few

seconds will flash green slowly if the PB-4 has successfully managed to

log into the access point.

2. Turn the PB-4 off (press switch until the LEDs go out).

3. Turn the PB-4 on again but this time start it in AP mode (press on/off only

until LED 1 comes on).

4. Access the PB-4 user interface page with your browser as described in the

previous section, connect to the PB-4 (click on red button) and then go to

Menu / About. The about box will contain a line that says STA Mode IP

Address: XX.XX.XX.XX. The address that is shown is the IP address that

has been assigned to the PB-4 by the access point, note it down.

Having found out the PB-4's IP address when in STA mode, you can use that

address to access the user interface page and then add a bookmark for that

page in your browser called something like "PB-4 STA Mode (at home)".

1.2. Initial screen

When you load the PB-4 user interface into your browser, after showing the

splash screen for a few seconds it will show an initial screen, like Fig 1.1

This shows a polar chart and a list of captured points (both empty as no points

have been captured yet). At the top of the screen, are the Menu and Connect

buttons and the name of the current job.

Most of the screen is used to display the PB-4 data. At the top of the region

are three tabs (Polar,Spectrum &Data) which you use to select the data you

wish to see.

The polar tab shows a polar chart, a list of captured points and

some buttons. For a detailed description of using the polar tab

Polar

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Initial screen

see Chapter 2 (propeller balancing) and Chapter 3 (rotor

balancing).

The spectrum tab shows a spectral display, a list of captured

spectra, a list of spectral lines and some buttons. See Chapter 4

for a detailed description of the spectrum tab.

Spectrum

The data tab shows an area that displays the current vibration

data (RPM, IPS, DEG) as text and some buttons. See Chapter 5

for a detailed description of the data tab.

Data

Fig 1.1. Initial screen

The PB-4 user interface is "responsive" - the layout changes depending on the

resolution and orientation of the user interface's screen. It should be usable

on many different user interface devices. For in-cockpit use, a 7" form factor

tablet is ideal. For lower resolution devices, you may find that changing the

orientation to landscape is beneficial.

1.3. Jobs

The PB-4 supports the notion of a "job".

• A job is simply a named collection of data (points and spectra) associated

with a single balancing job.

• There is always a

current job

. The name of the current job is displayed

alongside the connect button. When data is captured, it will be stored in the

current job.

• Each job is named and may be loaded into the user interface to become

the current job. The points and spectra captured for that job can then be

viewed.

• When new, the PB-4 contains a single job, called "default".

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Jobs

• Jobs can be created, deleted and renamed.

• The default job is always available. If you delete it, it is recreated.

• All of the job data is stored on an SD card in the PB-4.

• Jobs can be exported and imported so you can share job data with other

PB-4 operators and also view the job using the PB-4 online viewer.

1.4. Menu button

Clicking the menu button pops up a menu with these items:

Options Clicking this will toggle the visibility of the options

page. When the options page is being displayed,

to return to the tabs page you can either click

Menu / Options again or press the browser's back

button.

Two Plane Balancing Opens the two plane balancing dialog.

Fullscreen If your browser supports displaying a web page

fullscreen, clicking this will toggle fullscreen

mode. To exit fullscreen mode, either click Menu

/ Fullscreen again or press the Esc key (if your

device has a keyboard!)

Help Clicking this will display a simple web page with

links to the PB-4 documentation.

About Clicking this will display the About dialog. Some

of the information in the dialog is only available

when the PB-4 is connected.

1.5. Connect button

The connect button toggles the user interface - PB-4 connection state. The

current state is indicated by the colour of the button:

When the button is red, the user interface is not connected to the

PB-4. The browser can display the data for the current job that has

red

already been captured but no new data can be displayed or another

job viewed until the connection has been made to the PB-4.

When the button is green, the user interface is connected to the

PB-4 and the text on the button is updated with the PB-4's battery

green

capacity remaininga. New data can be displayed and other jobs

can be accessed via the options page.

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Menu button

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