updates

README.md

@@ -12,6 +12,9 @@ _Machine temporarily installed in the Haystack Metal Shop:_
 _"Too Many Potatoes" engraved on a gold-coated slide, with 1/64" end mill for scale:_
 ![too-many-potatoes_gold](img/too-many-potatoes_gold.jpg)
 
+_Stylus end showing base plate, work in vise, servo for stylus actuation, stylus control PCB, and modular superelastic flexure linkages:_
+![micropanto_detail](img/micropanto_detail.jpg)
+
 This work may be reproduced, modified, distributed, performed, and displayed for any purpose, but must acknowledge the orginal project. Copyright is retained and must be preserved. The work is provided as is; no warranty is provided, and users accept all liability.
 
 © zach fredin, massachusetts institute of technology, 2021
@@ -52,6 +55,9 @@ _... and again in inked stone:_
 _A Haystack welcome message (and another CBA "logo") in inked stone:_
 ![welcome_stone](img/welcome_stone.jpg)
 
+_Lauren Fensterstock's black hole drawing, later micro-engraved on a number of substrates (pictures incoming, when available...):_
+![blackhole_drawing](img/blackhole_drawing.jpg)
+
 ## machine design
 More information forthcoming... for now, [ecad](ecad) for the stylus control PCB, [firmware](firmware) for the stylus control firmware, and [mcad](mcad) for the mechanical design files. Parts are fabricated as follows:
 
@@ -67,6 +73,17 @@ More information forthcoming... for now, [ecad](ecad) for the stylus control PCB
 |pulltruded CFRP tubes|purchased|
 |final machine assembly|taper ream, ball-peen hammer, epoxy|
 
+The machine is built from modular superelastic flexures, a concept I developed as part of a class last semester. You can read a lot more about them [here](https://fab.cba.mit.edu/classes/865.21/people/zach/index.html). 
+
+_Stylus detail, showing diamond in down position:_
+![stylus_detail](img/stylus_detail.jpg)
+
+_Final assembly starts with taper-reaming the waterjetted aluminum parts to match the nitinol flexures:_
+![taper_reaming](img/taper_reaming.jpg)
+
+_Once prepared, the joints are assembled by tapping in 7/0 taper pins with a ball peen hammer:_
+![assembly_taps](img/assembly-taps.jpg)
+
 MicroPanto roughly consists of:
 
 |item|qty|