Uncategorized

Laser cutter update + bonus crab robot

I just got off the phone with Louie over at ECULLINE who sent me a “pre-alert”, whatever that means. Apparently the PRAGUE EXPRESS arriving from Quingdao on friday takes *three days* to unload. My machine will be in a bonded warehouse somewhere in vancouver until I clear customs by brokering everything myself. Apparently there’s no way to file the customs paperwork before it arrives, like UPS can do. In fact, I’m told if I show up early to try and expedite things they will fine me. For what? Being in a hurry? I don’t know. Best case scenario is that I can get my stuff “unlocked” by Tuesday and set up in my shop by Friday.

Here’s the irony: now that I’ve paid for the laser cutter and made room for the laser cutter I’ve got access to the machine I was *originally using* …again. I ain’t even mad. This morning I shipped more kits in one day than I ever have before. They greeted me with open arms at the post office and affectionate cries of “Hello, stranger!” Felt good, man. Felt good.

SO: in theory I now have a backup machine and a primary machine so I can cut parts and test new designs really fast. I’ve also got two 3D printers and a number of friends with them so all my manufacturing problems should – again, in theory – be behind me. As long as I don’t screw those up I can consider that challenge solved and I’m on to the next level: making sure the parts I don’t make are in stock the moment I need them.

BEGIN RANT

Long time readers will know how much fun this is: my web store does not understand that a kit is a collection of parts. When I sell a kit I have to manually adjust all my inventory. I I could accurately track how fast inventory was selling then I could write a program to order material on time for me. If my store understood that kits are made of parts then it would only offer as many kits as I can make. What’s that, we sold our last part X? Every affected kit would instantly display a lead time equal to the delivery time for part X.

END RANT

Spending the minimum possible time in supplying parts means I can spend more time meeting customers, providing support, and developing my next robots.

Ok, that was pretty dry. Time for something completely different.

This is my first robot, a crab that walks. It is still the most popular youtube video I’ve ever made by a couple orders of magnitude. I made the robot start to finish in 6 weeks.

The only unique feature when it came out was that it was the only open source robot of it’s kind. That meant you could tinker with the brain and make it do different things without having to re-teach it how to walk.

Uncategorized

Equipment upgrade – selling the BlackToe CNC to pay for the G. Weike laser cutter

Gallery here

My laser cutter is due to arrive in the port of Vancouver on the 21st at 10:00. I needed room in my garage, pronto. Thankfully the choice was easy: I had a giant CNC machine that never gets any use. Getting it into the truck, on the other hand, was an interesting challenge. See the notes in the gallery for all the pertinent details and some of the irrelevant ones, too.

Uncategorized

Merging an Arduino with a Motor Shield, one of Gunner’s great creations

The Makelangelo uses two PCBs: an arduino UNO and an Adafruit Motor sheild. It could be done with a single PCB by merging the two circuits onto a custom board. [Gunner] has made a compelling case in favor of the one-board movement: he’s built an arduino that could drive a single stepper motor. It’s a small step from there (no pun intended) to adding another and voila. Check out his video.

Be sure to check out his other sweet projects, too. Linear rails, pan/tilt heads, and even outdoor tracked vehicle.

Uncategorized

An Easier Way to Align Laser Cutter Mirrors

I bought a laser cutter that will be here any day now. While waiting I’ve been learning how to uncrate, install, and calibrate the machine. The worst part seems to be aligning the mirrors. The laser beam is invisible and very dangerous. The recommended way is very slow and goes like this:

  • put tape on the 3 mirrors
  • close the machine
  • fire invisible CO2 beam
  • open the machine
  • look at holes in tape
  • adjust mirrors
  • remove old tape
  • repeat

If you had a mostly harmless visible beam that matched the C02 beam then you could adjust the mirrors in minutes. This tool makes it possible.

Get the model on thingiverse.

How to

  • Get a $4 cat annoying laser
  • Print two copies of this part. It is printed on it’s side to prevent delamination problems.
  • Bolt them together with 25mm M3s so that they clamp onto the cat laser. The middle finger on the holder should push the button on the cat laser. The holder has long fingers so that the laser can be tilted, if necessary.
  • Rest it on a flat surface. You can also use the bottom hole to mount it on an M3 rod (which would need a base of some kind).
  • Put the tape on the mirrors.
  • Fire the C02 once.
  • Move the cat laser stand so that the red dot goes through all the tape holes. Both lasers now match. Do not move cat laser again.
  • Remove tape.
  • Align mirrors.
  • Turn off and remove cat laser.
  • Go mess with your pets.

This has not yet been tested so I would appreciate your feedback.

Uncategorized

Seattle Mini Maker Faire 2013

Seattle Mini Maker Faire was a blast!

SMMF 2013

Drawing portraits was a big hit again, and will be a regular thing from now on.

SMMF 2013

I had to do her portrait, it was very distinct. She said she “enjoyed being a girl”, which I thought was great. Anyone comfortable in their own skin has a power and confidence that shows.

SMMF 2013 Jon