Serge NOEL
139 lines
7.6 KiB
Plaintext
139 lines
7.6 KiB
Plaintext
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<meta name="generator" content="HTML Tidy for HTML5 for Apple macOS version 5.8.0">
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<title>JMRI: Edit Turntable Help</title>
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<meta name="author" content="Dave Duchamp">
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<meta name="keywords" content="JMRI help Layout Editor turntable">
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<h1>Edit Turntable</h1>
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<p>A Layout Editor turntable is a schematic representation of a turntable on the layout. A
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turntable is drawn as a circle with a variable number of track connections, called <em>ray
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tracks</em>. Each <em>ray track</em> is drawn as a short stub track radiating from the
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turntable circle. A track segment should connect to each ray track. Most of these track
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segments will connect a ray track to an end bumper. The distance of each ray track connection
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point from the turntable circle is fixed, but the direction of each ray track may be varied
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by dragging its connection point around the turntable circle. Any number of turntables may be
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added to a panel, and each turntable may have any number of ray tracks.</p>
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<p>A turntable is added to a panel by selecting <strong>Add Turntable</strong> in the panel's
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<strong>Options ⇒ Add</strong> menu. New turntables are placed at the center of the panel, and should be moved to the
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desired location by dragging its center point with the meta key pressed (right button drag
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on Windows). A turntable can also be added to a panel by selecting the <strong>Turntable</strong>
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option in the toolbar and doing a shift-click at the desired location on the panel.</p>
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<p>When a turntable is added, it has four ray tracks located in up, down, left, and
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right directions. The turntable's popup menu has two items. Selecting
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<strong>Edit…</strong> brings up an Edit Turntable dialog, and selecting
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<strong>Delete</strong> deletes the turntable. Before a turntable is actually deleted, the
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program asks for verification of that action.</p>
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<p><img src="images/EditTurntable.png" class="floatRight" alt="turnout dialog"> The Edit
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Turntable dialog allows the following:</p>
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<ul>
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<li>Changing the Radius of the turntable circle</li>
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<li>Add New Rays</li>
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<li>Change Ray Angles</li>
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<li>Remove Rays</li>
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<li>Configure Automation</li>
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<li>Configure Signal masts<span class="since">since 5.15.1</span></li>
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<li>Configure Bridge track<span class="since">since 5.15.6</span></li>
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</ul>
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<p>Ray track angles are measured from the vertical in a clockwise direction. So, thinking of
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an analog clock, an angle of 0 degrees is exactly vertical (the 12 o'clock position).
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Similarly an angle of 90 degrees corresponds to the 3 o'clock position, 180 degrees to 6
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o'clock, 270 degrees to 9 o'clock, and so on. Angles are always entered in degrees.</p>
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<p>To add a ray track, enter the angle corresponding to it's desired position in <strong>Ray
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Track Angle</strong>, and click <strong>New Ray Track</strong>. The turntable shows the new
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ray track immediately. To delete a ray track, find it in the connection list and press
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<strong>Delete</strong>. The ray track, and any connected track segment are immediately
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deleted from the panel. <strong>Caution: There is no undo for these operations.</strong></p>
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<p><strong>Note:</strong> An easy procedure is possible for accurately aligning ray track
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connection points and end bumpers so that each track segment extends through the center of
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the turntable. After positioning the center of the turntable, and after adding ray tracks
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where needed, expand the radius of the turntable by a factor of three to four. Then add end
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bumpers adjacent to (or on top of) each ray track connection point. After shrinking the
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radius back to its final radius, add track segments. Track segments will be aligned fairly
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precisely to the turntable center.</p>
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<p><span class="since">since 5.15.1</span>The bridge track can drawn as either <em>Side Track</em>
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or <em>Mainline Track</em>.</p>
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<h3>DCC Controlled Turntable</h3>
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<p>When this is selected it allows for control of turntables (and drivers) that use DCC turnout
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addresses to set the turntable to various positions. Such examples are the LDT TT-DEC or
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Heljan DCC Turntable. For each Ray, select the DCC turnout address and the position
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required to set it.<br>
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To set the turntable to the desired position, simply click on the ray that you wish the
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turntable to be aligned with.</p>
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<p>Note: There is no support for selecting the <strong>Head</strong> or <strong>Tail</strong>
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of the turntable bridge.</p>
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<h3><span class="since">since 5.15.6</span>Use Dispatcher with Signal Masts</h3>
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<p><img src="images/EditTurntableSignals.png" class="floatRight" alt="turntable signals dialog"></p>
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<p>When the <strong>Use Dispatcher with Signal Masts</strong> option is enabled, the edit
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dialog is expanded.</p>
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<p>While designed for use by Dispatcher, the signal masts can be used by any logic tool. </p>
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<p>Each ray has an approach signal mast. The destination mast for the signal mast logic (SML)
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is a <strong>Buffer</strong> mast. When the turntable is aligned to the ray and the bridge is
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not occupied, the approach mast will display an aspect indicating it is safe to move onto the
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turntable bridge. The SML is not automatically created. Use <strong>Auto Generate Signaling Pairs</strong>
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to create the SML.</p>
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<p>The move from the bridge to a ray track is controlled by the <strong>Exit</strong>
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mast. The Exit mast has SML for each ray track that contains a signal mast at the end
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bumper or at an anchor point. When the turntable is aligned to the ray and the ray is
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not occupied, the Exit mast will display an aspect indicating that is
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is safe to move from the bridge to the ray. The signal masts for the end bumpers or anchor
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points have to be manually <em>attached</em> using <strong>Set Signal Masts</strong>. After
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attaching the masts, use <strong>Auto Generate Signaling Pairs</strong> to create the SML.</p>
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<p>The <strong>Buffer</strong> and <strong>Exit</strong> signal masts are not automatically
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added to the panel. For reference it is handy to manually add these to the panel.</p>
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<p>This is an example of a three ray turntable with a single layout connection.</p>
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<p><img src="images/EditTurntableExample.png" alt="turntable signals example"></p>
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<h5><span class="since">since 5.15.7</span>Removing Manual Changes</h5>
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<p>The changes that implement <strong>Use Dispatcher with Signal Masts</strong> need to be
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removed when the option is disabled, a ray is deleted or the turntable is deleted. Removing
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the changes prevents JMRI errors and Java exceptions.</p>
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<p>If a change is not allowed, a dialog will display a list of the items to be removed.
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This image shows the items to be removed before deleting a turntable ray.</p>
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<p><img src="images/delete_turntable_ray.png" alt="delete turntable ray"></p>
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<p>Use the <strong>Signal Mast Logic</strong> table to remove the SML items.</p>
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