Drag Chain 46x20 outside. (aka Dragchain)

prusaprinters

<p><strong>Physical</strong><br>All dimensions are mm.<br>Link: External 46W 20D.&nbsp; Internal 40W&nbsp; 16D.&nbsp;Pitch 32.5<br>Bend PCD Ø125&nbsp; &nbsp; OD&nbsp; Ø145&nbsp;ID Ø105&nbsp; &nbsp; 6 links make 180°<br>Ends 52W&nbsp; 50L&nbsp;</p><p><strong>Extrude</strong><br>PETG (it flexes best; good for snap fits)<br>Nozzle 0.4&nbsp; Layer height 0.2<br>3 perimeters ( Makers Muse settings:&nbsp;<a href="https://www.youtube.com/watch?v=mE521Q4H6aY">https://www.youtube.com/watch?v=mE521Q4H6aY</a>)<br>Time: (1 Link + 1 Lid + 1 Fence) = 1h3m.&nbsp; &nbsp; End= 1h18 m<br><br><strong>Electrical</strong><br>I am designing a CNC machining centre which will use a 1.5kW spindle. It will use IGUS CF6.10.4 cable with 4 wires @ 1mm2 size.&nbsp; Diameter is 9.<br>IGUS state minimum dynamic bend radius to be 6.8*d = 6.8*9=Ø61.2.&nbsp;<br>Cable will be against the outside of the bend.&nbsp;OD is Ø145 but that is outside of link.&nbsp;Inside of link is Ø141 (floor 2 thick).&nbsp;So PCD of cable 141-9=Ø132 = R66 so that is safely more than the minimum<br><br><strong>Use</strong><br>The terms refer to a bend so Outside means outside of bend.<br>Usual chain is Outside Link + Inside Lid.<br>Inside Link + Outside Lid is provided as it may make it easier to access the cables &amp; tubes at the last bit after the bend.<br>Fence 77 means the compartments are 7 high.&nbsp;Inside depth is 16 but fence uses 2 so the 14 available are split evenly into 7 each.<br>There are Fence77&nbsp; Fence86&nbsp; Fence 95 &amp; Fence 104<br>I will use Ø9 cable so I will use Fence 95 to position the cable on the outside of the bend.<br>The inner 5 compartments can be used for the signal wires.&nbsp; However I will be using two drag chains so that the power cables can be separated from the signal wires so there will be no electrical interference on the signal wires.<br>To fit &amp; remove the lid use a sharp knife to lever it in &amp; out (Leatherman).<br>Ends.&nbsp; Inside &amp; Outside ends are provided.&nbsp; Use the one that fits in best. Side holes are M3 at 13 centers.&nbsp; Floor holes are M3 at 30 centers.<br>The rows of slots are for cable tying the wires &amp; tubes so they don’t slide within the Drag Chain.<br><br><strong>Photos</strong><br><i>Chain.</i>&nbsp;<br>&nbsp;Shows the bend with 2 ends.&nbsp; The black dots are my sequence markings as I refined the model.<br>Both ends are Outside.<br>All the links are Outside except for the last one at the bottom.&nbsp; Note that the lid is on the outside.<br><br><i>Links.&nbsp;</i><br>&nbsp;Left is Outside.&nbsp; Right is Inside.<br>The lids are purposely not interchangeable.<br>Both fences are 77.&nbsp; There is a groove in the link which they fit into.<br>To fit or remove the lid slip a knife in &amp; lever the side away.&nbsp; The dovetail has a chamfer to guide it in.<br><br><i>Ends&nbsp;&nbsp;</i><br>Left is Inside.&nbsp; Right is Outside</p><p><br><br>&nbsp;</p>