update for hotplate

README.md

@@ -4,24 +4,16 @@ This is a simple spindle for simple milling machines, that we can make with a 3D
 
 It uses a 'collet holder' (which can be found on ebay) with two simple roller bearings on either end. To drive the spindle, we use a hobby brushless motor and a GT2 Pulley.
 
-![spindle](images/ee-spindle-bldc.jpg)
+![spindle](images/spindle-in-blue.jpg)
 
-At the moment, the CAD in this repo is for a spinldle that will easly mount to a faceplate of one ['rct' gantry](https://gitlab.cba.mit.edu/jakeread/rctgantries) but it can easily be remodeled to suit another machine.
+## CAD
 
-## To Build
+A .f3d Fusion 360 File is located in the cad/ directory.
 
-To put this thing together, get the parts listed below together, and a 3D Printer. Go to the ```cam``` folder in this repository, and download either the .step or .stl files (the .stl files do not include bits required for an encoder mount - but that's outside of the project scope for the time being).
-
-Print the ```simplespindle-body.stl``` file, and if you can't source a 40T / 12mm Bore Collet Holder, also print ```gt2-40t-12mmbore.stl```. I print these things pretty much solid with infill. 
-
-I'm hoping assembly is straightforward: push the bearings into the obvious holes. They should press in with only a bit of force, if you need to use an arbor press that's OK, but **don't** hammer them in unless you like noisy machines. The collet holder should slide into the bearings without much resistance: just take care to line it up. 
+## Notes
 
 The belleville washers (disk springs) included in the BOM should be mounted between the collet-holder collet-holding end and the inner race of the bottom bearing. The 40T pulley w/ respective set-screws holds the collet holder into the bearing / body assembly - as you tighten those screws, try to compress those belleville washers. This way the bearings are a little bit preloaded, which helps them run smooth / for a long time / quitely. S/O to [Ilan Moyer](http://web.mit.edu/imoyer/www/index.html) for this tip.
 
-From there, I zip-tie the ESC somewhere handy, and mount the BreadBoardBoard nearby. Here's what that looks like:
-
-![img](images/ss-bbhack.png)
-
 ## Runout
 
 I measured a runout at the collet holder of ~ 1 thousandths, and at the tip of a 1/8" tool around ~ 3 thousandths. That's OK for $150 in parts, and a plastic housing.
@@ -30,39 +22,22 @@ I measured a runout at the collet holder of ~ 1 thousandths, and at the tip of a
 
 ## Controlling the Spindle
 
-This thing dreams of [atkbldcdrivers](https://gitlab.cba.mit.edu/jakeread/atkbldcdriver) but in the meantime, we use a [breadboard board](https://gitlab.cba.mit.edu/jakeread/atkbreadboardboard) to send a servo signal to an off-the-shelf ESC. 
+I'm (eternally) working on a brushless motor driver for this, and other brushless motor driver things. Until then, I am using off-the-shelf brushless ESCs (from quadcopter domain) to turn this around.
 
-## BOM V0.1
+# BOM
 
 What | Spec | QTY | Where Used | Link
 --- | --- | --- | --- | ---
-ESC | 40A 6S | 1 | Driving Motor | [Hobbyking](https://hobbyking.com/en_us/yep-40a-2-6s-sbec-brushless-speed-controller.html)
+ESC | 40A 6S | 1 | Driving Motor | [Hobbyking](https://hobbyking.com/en_us/yep-40a-2-6s-sbec-brushless-speed-controller.html) or your pick;
 Motor | 35-36 1800kV | 1 | Motor | [Hobbyking](https://hobbyking.com/en_us/propdrive-v2-3536a-1800kv-brushless-outrunner-motor.html)
 Collet Set | ER16 | 1 | Tool Holding | [Amazon](https://www.amazon.com/Engraving-Machine-Milling-Beauty-Star/dp/B0749FW9D5)
 Collet Holder | ER16x100L | 1 | Bedrock | [Amazon](https://www.amazon.com/a15060800ux0208-C12-ER11A-100L-Straight-Milling-Extension/dp/B012T6DQGM/) or [Ebay](https://www.ebay.com/itm/US-Stock-C12-ER16A-100L-Collet-Chuck-Holder-Straight-Shank-for-CNC-Milling/401225965058?hash=item5d6aee5e02:rk:5:pf:0)
-Spindle Pulley | GT2 40T 12mm Bore | 1 | Transmission | [Amazon](https://www.amazon.com/Orish-Alumium-Timing-Pulley-Synchronous/dp/B01H94CLCY/)
-Motor Pulley | GT2 20T 5mm Bore | 1 | Transmission | [Amazon](https://www.amazon.com/Qunqi-Aluminum-Timing-Pulley-Printer/dp/B01IMR6OR0/)
 Timing Belt | GT2 10mm Wide 75T / 150mm Loop | 1 | Transmission | [Amazon](https://www.amazon.com/RobotDigg-150-2gt-6-Endless-Length-Synchronous/dp/B07B5YK7J9/) or [Robotdigg](https://www.robotdigg.com/category/28/GT2-Endless-Belt)
 6001 Bearings | 12x28x8mm 2RS or ZZ | 2 | Spinning | [VXB](https://www.vxb.com/6001-2RS-Bearing-Deep-Groove-6001-2RS-p/6001-2rsbearing.htm)
 Belleville Disc Springs |  12.3x21.8x0.75 | 2-4 | Preload | [McMaster](https://www.mcmaster.com/94065k42)
-
-# V0.2
-
-I'm working through an update to this, adding some CAD now. This time I'm going for [crowned pulleys](https://woodgears.ca/bandsaw/crowned_pulleys.html) using the back-side of a 100T GT2 closed-loop pulley. I've added some fancy / fun tapered-screw-shaft-pinching setups for the pulleys.
-
-This is also going to hook up to the [hotplate](https://gitlab.cba.mit.edu/jakeread/hotplate)
-
-## V0.2 TODO:
- - assemble, check, rev
- - BOM, drawing 
- - belt tensioning / tracking ok?
- - bldc programming, power testing etc
- - belt testing slip / at high speed?
- - what is failure mode ?  
-
-## BOM V0.2
-
-What | Spec | QTY | Where Used | Link
---- | --- | --- | --- | ---
-FHCS M2.5x6 | 18-8 or Black Oxide | 3 | Encoder Manget Mount -> Motor | McMaster (?) 
-Timing Belt | GT2 6mm Wide 100T / 200mm Loop | 1 | Transmission V2 | [Amazon](https://www.amazon.com/BIQU-Printer-Timing-200-2GT-6-Closed/dp/B01FNT093A/)
\ No newline at end of file
+SHCS | M3x16 | 5 | Motor Mount, Motor Tensioning | McMaster 91292A115
+SHCS | M4x16 | 6 | Spindle -> Plate Mount | McMaster 91292A118
+Washers | M3 | 4 | Motor Mount | McMaster 933475A210
+Washers | M4 | 6 | Spindle -> Plate Mount | McMaster 93475A230
+Heat-Set Inserts | M4 | 6 | Spindle -> Plate Mount | McMaster 94180A351
+Heat-Set Inserts | M3 | 4 | Motor Tensioning, Spindle Set Screws | McMaster 94180A331