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Rotary Attachment for Goliath (and, possibly, the laser cutter)

Somehow this message got lost in my inbox. So, when he says “Tues night” he’s actually referring to December 12th. Anyways, better late than never.  Here is Rylan’s writeup about the new tool he made for us:

Hey everyone! On Tues night after the meeting I made a portable tail stock to match Albert’s motorized Chuck. It Took me all night but lucky I scrounged enough pieces of metal and the whole thing came together in one night — paint and all! I turned most of the parts on the lathe. My favourite part about the build was using a flexure and a clamp to adjust the height of the bushing near the handle at the back, that along with rotation of the large ring sitting on the flexure allowed me to align the back bushing very well despite the way that parts like to warp and shift as welds cool. Putting the ACME thread up on top instead of hidden underneath the carriage as is typical is a feature in this design as exposing the treads makes it them easy to clean with all the CNC cuttings.
This rotary attachment could also be easily be placed in the laser cutter and on the CNC router.


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Upcoming Workshops!

Making Soap

It has been a while, but summer is over, the leaves are falling, and people are starting to think about Christmas presents.  How about making your gifts this year?  We are hosting a couple workshops to help you out with that:

Soap Making.  Learn to make your own soap.  Cold process soap takes a bit of time to cure, but if you make it on November 16th it should be ready to use by Christmas.

Laser Cut Decorations (link to come).  Learn to use the laser cutter at Saskatoon TechWorks.  And, make decorations at the same time!  Use them yourself, or give them away.


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Saskatoon TechWorks Store!

Do you have a project idea but don’t want to wait 6-8 weeks for an order to arrive from eBay? Did you know that Saskatoon TechWorks has a store that is stocked with a variety of common items you might want to use in your project?  Browse our inventory here.  Now, admittedly, it’s a bit heavy on the Micro/Arduino side. What would YOU like to see stocked in our store? Let me know!

Yes, I did work at Radio Shack back in the early 90s.  Why do you ask?

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Makerspace Program at SPL Main Library

Are you interested in learning about the availability of Makerspaces (with new technologies for you to use) in Saskatoon? Well…

I’m very excited to invite you to an exciting (free) program the the Main library (Theatre) on March 30th at 6 pm.

At 6 pm in the Meeting Room, there will be several local exhibitors available to demonstrate the new technology and Makerspace available locally. Following that, we will screen a film called “Maker”. The trailer is here:

Three speakers will follow:
– Albert La from Sask. Techworks
– Erin Romanyshyn from the new Round Prairie library
– Sheila Maithel from Tailor Magic

Reception, coffee provided. Free admission.

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ESP-12F and Breakout Board

The ESP8266 module is a cheap and relatively easy way to build an Arduino-style project with WiFi capabilities.  It’s not without its quirks, though.  The following should help you get up to speed quickly.

The ESP is a power hungry device.  It requires a solid 3.3V DC power supply.  (Probably in the 1A range, depending on what else you are powering from the same supply. It doesn’t draw this much steadily, but it draws bursts while transmitting.)  Make sure you have appropriate capacitors mounted as close to the module as possible.  Also note, this module is 3.3V and is NOT 5V tolerant.  If you apply 5V to any of the pins, you will destroy it.  Use something like this to interface to any 5V devices.

Minimal Setup:
In order to operate, the ESP-12F module requires the following:

Pin Resistor Connection
GPIO0 Pull Up
GPIO15 Pull Down
CH_PD Pull Up

The breakout boards we have contain the resistors for GPIO15 and CH_PD.  The only connection you need to worry about is GPIO0, which toggles between “Run” and “Bootloader.”  (A pullup on Reset is not a bad idea, but not entirely required.)

Minimal for programming:
In order to program the ESP module, you need to pull GPIO0 low and have control of the reset line.

Pin Resistor Connection
TX RX on serial adaptor
RX TX on serial adaptor
Reset Pull Up RTS on serial adaptor or pushbutton to GND
GPIO0 Pull Up DTR on serial adaptor or jumper/button to GND
GPIO15 Pull Down
CH_PD Pull Up

If your USB-UART adaptor has RTS and DTR, you can program this module as easily as an Arduino.  If you don’t have those pins, don’t sweat it.  Simply wire GPIO0 Pulled UP, then jumper it to GND for programming.  Do the same with Reset. (Use a pushbutton for easier access.)  When you are ready to upload your new program, you will need to press and release the reset button. (or ground and unground a jumper.)

In your Arduino IDE, the current best package for ESPs is:

The installation instructions are fairly clear on that page.