Archive for the ‘CNC’Category

CNC Steampunk Harp – Part 1

 

Side view of harp with pockets routed

Side view of harp with pockets routed

For the past year, Elizabeth and I have been collaborating on a project using the amazingly cool CNC tools at Pumping Station: One. The goal: to build a harp. Not just any harp, mind you. A steampunk harp! The idea was to start with a kit (the Voyageur harp from Music Makers, 33 strings, cherry) but heavily customize it as follows:

  •  CNC cut brass panel inserts, inlaid in pockets routed in the sides of the harp
  • The brass panels would be etched using a galvanic etching process, similar to the one used by the Steampunk Workshop to create their clockwork guitar. Elizabeth would design the shape and custom artwork (gears, of course!) for this.
  • The sound board would be laser engraved with some type of steampunk design. The design is in progress, and we are searching for a laser engraver large enough to handle the sound board.
  • Although not strictly steampunk, I’d considered adding RGB addressable LED lighting under the neck of the harp, which could illuminate the strings, as well as respond to the pitch of the strings being played.
CNC routing brass

CNC routing brass

First, we had to start by routing the brass, using PS:One’s CNC 3020 router. Elizabeth drew the design, including the brass outline and the pattern we will use when we etch the brass. We did this last spring at PS:One, and we ran into massive problems with the brass vibrating and breaking end mills. The project remained dormant for many months until a breakthrough: What if we glued the brass to a scrap board? That would at least keep it immobile so it couldn’t chatter and bind on the end mill. The good news: This worked! Success! The bad news…. The Go To Home button on Mach3 does not, by default, raise the spindle before moving it. And a clamp was in the way. The result: A badly bent spindle. Well, all was not lost….
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23

01 2014

CNC Build Club Double Feature – 1/23/2014

fsl3d

 

In addition to having Alden Hart talk about the TinyG and motion control in general, Andrew Boggeri of Full Spectrum Laser is going to show off their new sub $2000 SLA resin 3D printer. This is the printer that is currently crushing the goal on Kickstarter.

Stop by and check out the machine and see some of the prints.  Resin printers are a little messy to move around so we probably won’t see it print, but plenty of samples will be shown.  He will be able to demo the drawing speed, software and cloud interface.

prints

 

The CNC Club is free and open to members and non members.  If you want to attend, please RSVP on Meetup.

13

01 2014

CNC Build Club – TAZ 3 Unboxing

TAZ 3

 

Thursday (1/9/2014) night at 7pm we will have an unboxing party for Pumping Station One’s new 3D printer – the Lulzbot Taz 3! The Taz 3 prints larger and faster and in more materials than the other printers we have at the space. Come check out the mysterious BOX, see the printer set up, and maybe we’ll even get to Hello Squirreled.

Also, Ryan Pierce will be presenting “The Hard Knocks School of CNC Milling” covering how he made every mistake possible, and how you can avoid making them yourselves! This will include a lot of useful, practical tips, and a demo of the method he is using, showing the entire tool chain process, to route precisely aligned pockets for his and Elizabeth’s “CNC Steampunk Harp” project

08

01 2014

3D Printed Replacement Parts

Our shop has a few Black & Decker drills. They’re not contractor grade tools by any means. I was using one the other day for a project, and as I was walking back to the tool crib to put stuff away I was idly clicking the drive direction switch back and forth, as one does with a drill. I heard a snapping noise and the button now moved freely, no longer engaging the electrical switch responsible for direction reversal. Bummer. I figured I’d pop it open and see if I could repair it.

B&D Drill

The drill in question

DSC_5621

The factory part that broke. Note the distressed, white plastic at the bottom center.

The issue was a small plastic pin that engaged a switch with a matching cutout. Not a very complex mechanism. I drew the part up in Sketchup:

drill-fix

 

I skipped the nicely radiused leading edge, but this part is otherwise dimensionally similar to the factory piece. My initial attempts to use an entirely 3d-printed part failed, as the ~3mm pin was just not large enough to get a sturdy printed feature. I decided to drill it out and use a #2 screw to replace the pin. This one should outlast the rest of the drill.

DSC_5629

DSC_5632

At this point you might be wondering why I didn’t do that with the original part to begin with, and that’s valid. My only answer is, “Because I didn’t think of it.”

DSC_5634

The part’s installed, and the drill is back in the tool crib.

It’s a simple result, but it’s the sort of thing I love about 3D printing.

-Derek

 

07

01 2014

CNC Build Club with Alden Hart: 1/23/2014

AldenHart

Alden Hart, the creator of TinyG and the grblShield will be in town later this month and will give a talk at the 1/23/2014 CNC Build Club @7:00pm.  The meeting is open to members and non-members.  If you want to attend, please RSVP via Meetup.

The grblShield is a basic stepper motor driver Arduino Uno Shield.  It is part of the standard parts list for the Shapeoko and there are thousands of these in the field. It can also act as a shield for the Arduino Due and run a special version of TinyG firmware.

grblShieldv4-800-600x399

 

 

 

 

 

 

The TinyG project is a multi-axis motion control system. It is designed for CNC applications and other applications that require highly precise motion control. TinyG is meant to be a complete embedded solution for small/medium motor control. Here are some of the main features of the v8 hardware.

  • Integrated motion control system with embedded microcontroller (Atmel ATxmega192)
  • 4 stepper motor drivers (TI DRV8818) integrated on a ~4 inch square board
  • Stepper drivers handle 2.5 amps per winding which will handle most motors up thru NEMA23 and some NEMA34 motors
  • Accepts Gcode from USB port and interprets it locally on the board
  • 6-axis control (XYZ + ABC rotary axes) maps to any 4 motors
  • Constant jerk acceleration planning (3rd order S curves) for smooth and fast motion transitions
  • Very smooth step pulse generation using phase-optimized fractional-step DDA running at 50 Khz with very low jitter
  • Networkable via SPI to support off-board devices and for networking multiple boards into multi-axis systems
  • Microstepping up to 1/8 (optimized DDA makes this smoother than many 1/16 implementations)

tinyg

 

05

01 2014

3D Printing Cage Match: 7pm Dec 12 at Beauty Bar

3DPCM LogoWe’re throwing a 3D Printing Cage Match Party at 7PM at Chicago’s Beauty Bar.

See factory teams, local businesses, and hobbyists compete to print a medieval weapon as fast as possible, and then fire marshmallows at their slower competitors!

Our own DJ Adam Dzak will be spinning, Jim Burke will provide commentary, and PS:One’s Lulzbot AO-101 and Makerbot Replicator will both be competing as well.

Want to attend? RSVP (free) here.

Want to compete? Register (free) here.

More information at the 3D Printer Cage Match Homepage.

Please note that this event will serve as the CNC Build Club meeting on the same evening.

02

12 2013

CNC Build Club – 4 Axis Milling

4th-axis_large

 

(picture from CNCCookbook blog)

This week we are going to play with the rotary axis on the little CNC mill.  We are going to assemble it and calibrate it.  We will use a demo of DeskProto to run a job on it.  We will of course start with the CNC Ninja Squirrel, then try some other projects.  It you have something cool to try, bring a file in STL format and a round piece of material to mill it out of.

hs

 

Join us Thursday Nov, 14th at 7:00pm.

 

13

11 2013

CNC Build Club: Shapeoko 2 Demo

Shapeoko

 

At the next CNC Build Club, on Thursday 10/24/2013 at 7:00pm, we are going to have a demo of the, soon to be released, Shapeoko 2 CNC router.  The ShapeOko was designed by local inventor, and PS:One friend, Edward Ford.  The original version was extremely popular.  The new version adds many new features.

  • Larger work area.
  • Easier to expand
  • Open front and rear for feeding stock through
  • Dual motor Y axis is now standard
  • More ridged
  • Belts lay flat and are easier to install

Shapeoko

 

It will go on sale at Inventables very soon.  Inventables will also be giving away one milling bit starter kit at the meeting.  This a a kit of 5 solid carbide 1/8″ diameter bits.  It includes 2 spiral upcut bits, 2 straight flute bits and 1 ball end mill.  You must be registered on Meetup for this meeting and present to  be eligible for the bit kit.  The meeting is open to members and non-members.

Shapeoko

18

10 2013

CNC Router Class and Training

KL4530T

 

This week at the CNC Build Club we are going to do a CNC router class, training and certification.  If you want to learn a lot about CNC routers come to the class.  We will start out with a little class room training that is open to all including non-members, then move to the shop where we will do hands on training and certifications.  This will be limited to 8 people and they must be PS:One members.  If you want to be one of those 8 people, please be one of the first 8 to RSVP the meeting at Meetup.com.

16

09 2013

CNC Build Club – CNC Controller Roundup

TinyG

 

This week we are going to talk about as many DIY CNC controller options as we can find.  All CNC  projects from 3D printers to mills require a controller.  This open discussion might help you choose your next controller.  Here is the list we are going to start with.

linuxcnc-logo-chips

AX33DP-3

02

09 2013