Check out what went on last night at Workshop 88, and while you’re there like us on Facebook:
Here’s some ideas for the maker, tinkerer, builder on your Christmas list. (Following these links and buying from Amazon will support Workshop 88.) Most of these items are still available to be shipped before Christmas!
Workshop 88 member Anna Gillespie created a series of animatronic owls for an event at the public library where she works. The owls were controlled with arduinos using servo motors and a wav shield for the sound of the owl hoot. Some of the owls turned their heads and some of them flapped their wings in addition to hooting. This was a great project to watch from start to finish; thanks, Anna, for sharing with us!
Another great open house night at Workshop 88! Ray got some assistance with his robot project from some young makers.
Last Thursday evening we had the pleasure of having a group from the Society Of Women Engineers tour our makerspace and ask questions on the many aspects of being a maker and what we were working on. They were a mix of female Engineers from different fields of engineering; chemical engineers, mechanical engineers, electrical engineers,and civil engineers. Really great night having them here with us. Are you, or do you have a group of people interested in makerspaces or hackerspaces? Come visit us on any Thursday evenings from 7-10 pm @ workshop88.
CAD CAM tutorial
by D. Scott Williamson
This tutorial will show you how to use Computer Aided Design and Computer Aided Manufacturing or CAD CAM tools to create and preview a Gcode file of the Workshop 88 logo that can be run in a 3 axis CNC Mill.
There are 5 main types of machine operations
- Engrave (follow path): The tool tip will follow the 3D path provided.
- Profile: The tool edge will follow either the inside or outside contour of a path down to the specified depth.
- Pocket: The tool will remove all the material within a contour down to the specified depth.
- Drill: A drill routine will be executed at each point location. Drill routines come in 2 flavors:
- “Peck” used with drill bits, drills to successively deeper depths liftig the bit out of the work regularly to clear chips from the flutes.
- “Spiral” used with endmills that are a smaller diameter than the finished hole.
- 3D relief: The tool tip will remove material above a 3D surface usually specified in a 3D model or a 2D height map image. There are two main modes:
- “Waterline” similar to inverted pocket operations where bulk material is efficiently removed outside the 3D model to a number of stepped depths resembling waterline in a topological map. Typically used in a first pass with a large roughing bit to remove the bulk of the material.
- “Raster” moves the tip of the bit smoothly over the model in a raster pattern.
Gcode is a “numerically controlled programming language” which is why a Gcode file extension is typically .nc. It is a human and machine readable text file. You will rarely if ever need to look at or edit the Gcode.
This tutorial will demonstrate Engrave, Profile, and Pocket operations, which are the most popular.
There are 4 steps to this tutorial:
- Create a .svg file containing paths needed for machine operations
- Create machine operations
- Export Gcode
- Simulate, visualize and validate
Want to make your own case for your Raspberry Pi Zero at Workshop 88? One of our members has left his design available for anyone who wants to make one on the laser cutter laptop. Let us know if you want to make one and what you are using your Pi Zero for.
Last Thursday we had quite a bit going on at the weekly open house:
Ray connected the chassis of a motorized wheelchair to a remote control unit and was able to drive it around the front room. Here’s a video:
The laser cutter was being used extensively to cut out some tesselating lizards and geckos, as well as to make stencils for an ammo box intended to hold plastic eggs. The project is called “Hen Grenades”.
Later in the evening Rachel came in and showed off her new LEGO compatible circuit boards – they are really awesome! We were having so much fun playing with them that no one remembered to take photos. Come in next week and ask her about them!