Toggle previous flow rate test visibility

Plus tweak heading and order

calibration.html

@@ -18,10 +18,10 @@
         <li><a href="#steppers">Stepper Motor Driver Current</a></li>
         <li><a href="#temp">Temperature Tuning</a></li>
         <li><a href="#retraction">Retraction Tuning</a></li>
+        <li><a href="#speed">Speed & Max Flow Tuning</a></li>        
         <li><a href="#accel">Acceleration Tuning</a></li>
         <li><a href="#linadv">Linear Advance</a></li>
         <li><a href="#xyzsteps">XYZ steps Calibration</a></li>
-        <li><a href="#speed">Speed & Max Flow Tuning</a></li>
     </ul>
 
     <div id="intro">
@@ -848,6 +848,8 @@ M84 ; disable motors
             <p>Lower acceleration and jerk will result in a slower print time, as the printer reaches top speed more gradually and corners at a lower velocity. This is easier on the printer, with potentially increased component lifespan and less need for regular maintenance. It reduces surface artefacts such as ringing/ghosting, unless it is far too conservative, in which case it may introduce bulging in corners.</p>
         </div>
         <h2>Calculating maximum feedrate - optional but strongly recommended</h2>
+        <p>This is simplified test that will not be as accurate as using the gcode generator on the <a href="calibration.html#speed" target="_blank">Speed/Max flow tab</a>. If you would like to see it, you can toggle visibility <span style="cursor:pointer;" onclick="$('#oldFlowTest').toggle();"><b>here</b></span>.</p>
+        <div id="oldFlowTest" style="display:none;">
             <p>One strategy is to calculate the fastest your 3D printer can move while extruding cleanly, set this feedrate in the slicer, and then tune acceleration to meet this speed. If you are not interested in printing as fast as possible, skip to the next section.</p>
             <p><i>This part of the guide and calculator is adapted from <a href="https://grabcad.com/tutorials/dialing-in-a-filament-and-specifying-the-max-volumetric-e-xtrusion-value" target="_blank">Martin Pirringer's tutorial</a>. Please consider supporting him and his robotics team through <a href="paypal.me/DudeWithaPulse" target="_blank">paypal</a> or you can also donate to team 1989 through their <a href="https://www.vernonrobotics.com" target="_blank">Team 1989 Web Site</a></i></p>
             <p>The following calculator will assist you in determining the maximum feedrate your printer/extruder/hot end is capable of.</p>
@@ -905,6 +907,7 @@ M84 ; disable motors
                 <p class="result">Your maximum reliable XY feedrate is <b><span id="maxFee">90</span> mm</b> per second.</p>
                 <p class="warning">Warning: This value is dependent on a number of variables such as filament type, brand, colour, ambient temperature, etc. Be conservative to ensure success.</p>						
             </ol>
+        </div>        
         <h2>Acceleration Tuning</h2>
         <p>We will now produce an acceleration tower to conveniently test back to back settings in a single print. If you would like to slice the model yourself, here is the STL: <a href="files/accelerationtower.stl">accelerationtower.stl</a>. It should be sliced with a normal base, but hollow, no top layers and only 2 perimeters.</p>
         <p>The only thing you need to know before this test is whether your firmware is set up for jerk (older) or junction deviation (newer). Entering <b>M503</b> via terminal will give a list of printer variables:</p>
@@ -1116,7 +1119,7 @@ M84 ; disable motors
     
     <div id="speed">
         <div class="exp">
-            <h2>Speed/Feedrate/Max Flow Tuning</h2>
+            <h2>Speed & Max Flow Tuning</h2>
             <h5>Aim:</h5>
             <p>To find the maximum feedrate suitable for the outer walls, in terms of surface artefacts, flow rate and reliable extrusion.</p>
             <h5>When required:</h5>