Posts Tagged 'spring scale'

Weighing Your Options – Spring and Digital Scales

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The previous post demonstrated animated “balances” as presentation metaphors. Other forms of weighing devices use an indicator of some kind rather than a direct comparison of two weights. Mechanical scales using springs and electronic scales with digital displays are examples.

The simplest kind of spring scale is a “slider;” here’s an example:

The animation suggests that outdated legacy technology puts the organization in the red danger zone. The bouncing effect adds some life to the animation.

Here’s how the scale is constructed:

  • There are 4 parts (groups): the static body (blue outline), the load (black), the pointer (red), and the “hanger” (green). Each is made of standard PowerPoint shapes.
  • The load is labeled using an OCR style font to suggest obsolescence.

Here are the animation details:

The load appears with a Fade; the load, hanger and  pointer are animated by a Down motion path with a Bounce End option (I added a red rectangle to the animation pane to show the bounce timing). These parts move together but are separate groups; after you apply the motion path to one part, use the Animation Painter to apply the motion to the other parts.

NOTE: The Bounce End option is available for motion paths and some other effects; the option is set in the Effect Options pane:

The option is set by using the slider to the time you want the bounce to start relative to the start of the effect; in this case the duration of the motion path is 0.8 sec so the bounce occurs in the last 0.2 seconds of the motion.

The motion path actually moves beyond the end point temporarily to implement the bounce.

The next example of a spring scale is the type you might see in a grocery store; it uses a pointer on a round dial to register the weight in the suspended pan:

 

Here’s the construction:

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There are three parts: the body/dial (blue), the pointer (red) and the pan assembly (green). The pointer (a Diamond, an Oval and an Isosceles Triangle) includes a dashed circle to establish the center. The pan assembly is a Pentagon (rotated) and a Chord.

I used the techniques discussed in my seminal post on clocks to build the dial. Briefly, create a group containing opposing tic marks and digits, duplicate and rotate around a common center. Editing the digits completes the dial:

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TIP: You can rotate an object precisely using the Size options (Format Shape/Size & Properties/Size/Rotation).  Changing the Rotation value (degrees) rotates the object relative to its initial position. You can use negative numbers for counterclockwise rotations. When a rotated object is duplicated, it retains the edited value.

Here are the animation details for the spring scale:

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  • I used a Fly-in for the entrance of the load; it’s easier than a motion path. The duration is 0.6 seconds.
  • I used the Bounce End option for the Fly-in; I set the timing at 0.3 seconds. This means that the load will reach its lowest point at 0.3 seconds and the bounce effect will start at this point, lasting until the end of the Fly-in – 0.6 seconds.
  • As in the motion path, the object will temporarily move slightly beyond its expected endpoint.
  • The Teeter effect on the pan starts when the load reaches it (0.3 sec).
  • The Spin of the hand also starts at this point.
  • The Spin also has a Bounce End option. In this example. the Spin has a duration of 0.7 seconds with the bounce timing at 0.5 seconds. This means that the hand reaches a point slightly beyond its endpoint at 0.5 seconds and bounces until 0.7 seconds.

TIP: Teeter is an “emphasis” effect (not associated with Entry or Exit). It causes the object to rotate slightly, return and repeat (4 times). With short durations, it is useful for simulating vibrations or shudders. You can see the details of the effect by creating an example with a long duration. The center of rotation can be altered by grouping the object with a properly sized and positioned circle.

You can use red-yellow-green segments on the dial to show a change in status or add indicative text.

A variation can show a negative effect; maybe too much workload:

 

Another “last straw” load has been added with the same animation of the load and the pan as before. However, the hand has a motion path with a simultaneous Spin and the dial falls. A dashed circle has been added to the dial so that a Spin makes it fall to the side. You can invent additional chaos if you want;  see the explosions post, for example.

Close observers will note that the pan doesn’t actually drop when the weights are added in this example. This slide has enough going on. If you disagree, you can add motion paths as in the previous examples.

Removing negative things like debts or distractions can improve the situation. Here’s an example demonstrating this using another kind of spring scale:

 

The construction of the scale is straightforward using standard shapes.

Here is the construction of the red-yellow-green indicator:

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TIP: The 5-pointed Star (and several other standard shapes) are not symmetric when their height and width are equal. Use a circle as a guide to manually adjust width and height to get a radially symmetric shape.

RANT: I have had trouble using Artistic Effects like Blur; the effect may work once but then becomes unavailable or inoperable. Some others have reported these problems. I suspect that it’s because I use a $400 Chinese laptop and the software is badly designed. I have no problems using other software (e.g., Corel Paintshop) to create blurs and other effects.

The objects disappear via a Dissolve and a simultaneous motion path. Here’s the animation:

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Digital scales don’t create a lot of action, except for the display – and we can take advantage of that. Here’s a personal “bathroom” scale:

 

I used a font that mimics a 7-segment LCD display (from dafont.com ), common for these devices. There are 5 text boxes that appear, one after the other – an Appear animation, followed 0.2 sec later by a Disappear and an simultaneous Appear for the the next text box.

Here’s an animation  about relieving burdens that uses a digital scale:

 

Here are notes on this animation:

  • For simplicity, I created all the text boxes spread out on a separate slide.
  • The first text box (HELP) uses a Start After Previous/Blink animation with the Repeat Until Next Click option. The HELP text will blink when the slide appears and will continue until the first click.
  • I applied After Previous/Appear to all remaining text boxes. Then I added Disappear after 0.2 sec  to  each box. You can do this in two steps by selecting the boxes in order (Cntrl/Click) and then applying the two animations.
  • I modified three animations to Start on Click.
  • Here’s part of the Animation Pane:

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  • Next, I selected all of the text boxes and aligned them Center and Middle; this stacks the text boxes. Then, I copied and pasted the text boxes on the indicator window on the scale.
  • To complete the project, I animated the loads.

If you want to see more details, use the link below and click on the PowerPoint icon to download a free “source” PowerPoint file containing these projects:

Powerpointy blog – spring and digital scales

See this page for more on downloading files.

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