From 76b715317c9ac02a5c08fb56f540481e4b149e75 Mon Sep 17 00:00:00 2001 From: Jake Read <jake.read@cba.mit.edu> Date: Fri, 27 Oct 2017 14:12:24 -0400 Subject: [PATCH] ongoing, tables --- README.md | 11 +++++++++++ purchase-parts.md | 7 ++----- 2 files changed, 13 insertions(+), 5 deletions(-) diff --git a/README.md b/README.md index b4cabed..14e5020 100644 --- a/README.md +++ b/README.md @@ -95,7 +95,18 @@ Now I brought this into Fusion to do some CAM. From Rhino, select the geometry f  +I go to the CAM section right away, and setup some stock. First thing, our Shopbots are setup in Inches, so check that in the 'units' in the top of the tree. I'll use a 0" offset on top of the model, 0.05" on the bottom (then we can be sure to cut through later on) and a 0.75" offset on the sides - I want to be sure to clear the screws I'll be using to fixture my HDPE sheet. +For tools, I set up with a 1/8" 'O-Cutter' - as in, one flute. This is going to be my detail workhorse - it'll cut teeth and holes. I also have 1/4" O-Cutter to do profiles and cutouts. My two other tools are a Chamfer Endmill, used for, well, the chamfers, and a 1/16" 2-flute endmill for some detailing on the pinion. Here's a quick table of the tools, and their feeds and speeds. I used [the CBA Feeds and Speeds Calculator](https://pub.pages.cba.mit.edu/feed_speeds/) to ballpark these, and I'll dial them in as I test the first axis. + +Type | Flutes | Diameter | What For | Feed, XY (IPM) | Feed, Plunge (IPM) | Spindle Speed (RPM) +--- | --- | --- | --- | --- | --- | --- +Endmill | 1 | 1/8" | Most Details, Holes | 55 | 25 | 13500 +Endmill | 1 | 1/4" | Cutouts, Grunt | 55 | 25 | 7000 +Endmill | 2 | 1/16" | Pinion Detail | 75 | 25 | 20000 +Chamfer Mill | 2 | 1/2" | Rail Edges | 100 | 50 | 6000 + +I also have a tool library for Fusion 360, include TODO here. ## Assembly - Careful on Blocks! Trim and Align diff --git a/purchase-parts.md b/purchase-parts.md index a666a62..e63c186 100644 --- a/purchase-parts.md +++ b/purchase-parts.md @@ -24,8 +24,5 @@ - Hardware - Set Screws Tools - - 1/16" for M3 Taps ? if they are M4s you can do 1/8" - -> DO THAT - -> NOW: this, circle once again w/ M4 Hardware in the Rails - -> Order 0.9* steppers, send list to others - -> Circle on CAM and bring up for test! does HDPE work? :| \ No newline at end of file + - o-cutter, 1/8" + - Chamfering Bits for Others \ No newline at end of file -- GitLab