Dial Indicator Mount for Ender 3S1

I wanted to improve clifforda14's mount by shifting it back towards the x-carriage to get the axis of the dial indicator in plane with the nozzle.  I opted to only use two screws to fasten the mount to the extruder.  The third (blind) hole, is only a locator, to help in installing this tiny mount.  It should fit snugly enough over one of the socket head screws to hold it in place while threading in the two mounting screws.  You will need two M3 X 6 SHCS for mounting (3mm longer than the stock screws to account for the thickness of the mount).

In addition, I made the bore exactly 8mm to fit my dial indicator, and split the bore open to allow it to expand easily.  To make it easier to release the indicator from its mount, I added “squeeze” tabs which open up the bore just enough to loosen its grip.

Next, I adjusted the height of the pad where the indicator mounts to get it a bit closer to the bed.  Lastly, I added a semi-circular pad on the left side (extruder side) that matches the O.D. of the indicator.  This helps quickly align the face of the indicator towards the front of the printer.  As a bonus, if the indicator is rotated 90 degrees clock-wise, it will lift the indicator up away from and out of range of the bed.  This is just in case you leave the indicator in the mount and begin any sort of automatic bed movements (you do not want the probe to extend below the bed while the extruder is moving about!! - I found out the hard way!).

For maximum strength, the mount should be printed as shown in the first picture (indicator axis vertical).  Use 4 or more perimeters and block supports from the mounting holes.  I printed mine with PLA-CF and so far it is holding up just fine.  If you print a lot of hi-temp materials you may want to use ABS or other filament with higher melt temperature.