Parametric Multi-Angle Phone Stand

prusaprinters

<h3>Parametric Multi-Angle Phone Stand</h3><p>&nbsp;</p><h4><strong>Update 20211117&nbsp;</strong></h4><p>Now also allow phones to stand upright in the stand. Updated and refactored the code.</p><p>&nbsp;</p><h4>Update 20211102</h4><p><strong>NOTE:</strong> the web site does not support the upload of Excel files. I had to rename the upload file:<br>designdata-rename-to-xlsx.txt<br>After download, please rename the file to:<br>designdata.xlsx<br>for the code to work.</p><p>Added examples with a smooth tower, no ridges.</p><h4><strong>Summary</strong></h4><p>Multi-angle (20-75 deg) phone stand matched to your phone dimensions.</p><p>The design is fully parametric, providing for different phone sizes. The top and bottom of the phone fall into place in matching recesses in the frame. &nbsp;The phone can be tilted at angles from 20 degrees to 75 degrees.</p><p>The stand can be made with two vertical parts connected by short beams (sticks) or as a single, wider vertical part that must be printed wide enough to be stable.</p><p>CadQuery supports parametric design using Python. Parametric design proved to be invaluable for this design, allowing easy adjustment of the design. &nbsp;The CadQuery code is in the file `stand.py` and some of the adjustable variables are shown in `standconcept.pdf`.</p><h4>&nbsp;<strong>The Design</strong></h4><p>The design is coded in Python in CadQuery with data captured in an Excel file. The datafile has a number of design cases. Not all the designs were tested in printed form. The Note9 and S21Ultra designs were tested.</p><p>A side view with key dimensions is shown in `standconcept.pdf`. Most of the important variables are in the Excel data file. &nbsp;</p><p>All dimensions in millimetres, and all angles in degrees. These variables are:</p><ol><li>Phone (string): configuration and STL filename.</li><li>phonewidth (double): outer portrait width of phone plus case. &nbsp;This dimension must be accurate because it determines the tower position, relative to the base positions. &nbsp;If this dimension is wrong the design will not work.</li><li>phonethick (double): outer thickness of phone plus case. &nbsp;This dimension is NOT critical, make it bigger than the actual phone width in order to avoid funny shapes on the tower.</li><li>phonelong (double): outer portrait length of phone plus case. &nbsp;This is also the length of the beams/sticks, in order to place the vertical sides on the outer edge. &nbsp;This dimension is NOT critical.</li><li>basewide (double): width of the base of the side, this is eventually the width of the vertical parts. Make wider if only one part is used (without sticks).</li><li>basedepth (double): depth or length of the base. Must be deep enough to support the rear of the stand.</li><li>baseheight (double): &nbsp;height of the central base section. The front is higher by 6 mm, see `basefront`, to provide adequate vertical support for low tilt anges.</li><li>basedrop (double): how much the base is dropped relative to initial position.</li><li>firstYoffset (double): Distance from the front to the first dip.</li><li>dosticks (boolean): 0 or 1. If 0 no sticks or holes are used. If 1, make holes and sticks.</li><li>stickdepth (double): stick width.</li><li>stickshorten (double): If the stick is not the same length than `phonelong`, this distance is substracted to make shorter sticks.</li><li>stickthick (double): stick thickness. The stick is quite thin, so print with higher infill.</li><li>stickpositionAngles ([double]): list of stick hole angle(s) in degrees.</li><li>stickpositionY ([double]): list of stick y (depth) coordinates of lower left corner.</li><li>stickpositionZ ([double)]: list of stick z (height) coordinates of lower left corner.</li><li>towerrear (double): thickness from the line connecting the top phone edges to the back of the tower.</li><li>towerfront (double): &nbsp;thickness from the line connecting the top phone edges to the front of the tower.</li><li>numpositions (int): how many angles, must be odd in order to support three-point arcs.</li><li>towerlimitsYpos ([double]): list of two values for y range for parametric variation of the phone bottom corner variation. &nbsp;For increasing angles, the bottom corner moves along the line defined by `towerlimitsYpos` and `towerlimitsZpos`</li><li>towerlimitsZpos ([double]): &nbsp;list of two values for &nbsp;z range for parametric variation of the phone bottom corner variation. For increasing angles, the bottom corner moves along the line defined by `towerlimitsYpos` and `towerlimitsZpos`</li><li>towerlimitsAngles ([double]): &nbsp;list of two values for angle parametric range (degrees).</li><li>towerrearfootslope (double): If zero the back of the tower is connected to the base by a straight line. If non-zero (must be negative) this slope helps determine a three-point arch connecting the base to the bottom of the tower. &nbsp;This variable is very fickle and requires careful adjustment (between -0.1 and -3 seems to work sometimes). If you have difficuly, just make this a zero for a straight line.</li><li>filletrad (double): fillet radius. Sometimes sharp edges will not render the design if the fillet is non-zero. Set the fillet to zero while debugging.</li><li>clearance (double): clearance between hole in the side and the stick.</li></ol><p>The design is done in [CadQuery](https://cadquery.readthedocs.io/en/latest/). Thanks to the CadQuery development team and for the support on the [CadQuery Group](https://groups.google.com/g/cadquery/c/qyUJNKCnPu4). &nbsp;The code-based development is supported by a convenient GUI [CQ-editor](https://github.com/CadQuery/CQ-editor).</p><h4>&nbsp;<strong>Print</strong></h4><p>PLA or better.</p><p>Vertical parts printed with 15% infill and sticks with 30% infill. Glue the parts together.</p><p>Turn the vertical part(s) on the side on the build plate.</p><p>&nbsp;</p>