Saturday, March 31, 2018

Adjustable Moon Board Climbing Wall


I built this adjustable climbing wall in 2012. All of the lumber is pressure treated. I uses 6”x6” x 12’ posts which were placed in 3 feet deep holes and back filled with sakcrete concrete. The plywood panels are 3/4” pressure treated which I stained with a solid stain. The hinges are galvanized and are screwed though the plywood and into the fame. The kick board is 16” by 8 feet. The movable wall is 3 - 4’x8’ panels.

I start most designs with a sketchup model:

Here's a link to my model.

Here are the download links for 2017 sketchup make. I think it's better than the new web version.

SketchUp Make 2017: mac OSX    Win64    Win32(2016)

I purchased the stainless steel t-nuts from 3-ball climbing

I purchased a set of the Moon board original school holds. I used the Moonwall pattern for the t-nuts. https://www.moonboard.com/Content/Information/How-to-build-a-MoonBoard.pdf

The moon holds are pretty small and not good for warming up so I supplemented with holds from atomik.

I purchased the winch from Amazon


Here is a link to the photo album with some construction sequencing.
https://photos.app.goo.gl/MiAqkwW0wU6j0KL93







Wednesday, March 14, 2018

Thoughts on Gun Control

I started this article writing a response to the question:

How is the [gun] problem any different than banning alcohol, which kills 10,000 people a year in DUI's?

As Christopher Marten said, the main difference is the purpose of the object. Alcohol and cars are not specifically designed to kill people. Alcohol and cars obviously don’t mix well however, separately each has had a net positive effect on humanity.

Some historians believe cultures in which alcohol was produced survived and thrived due to its antiseptic and preservative properties especially when and where clean water was scarce. The relaxation, stress reducing, and social lubrication effects also provided benefits. Alcohol has been culturally important throughout history as evidenced in its presence in religion. My understanding is that Judaism, Hinduism and Christianity use alcohol. Islam appears to be somewhat neutral on its use and my understanding is Bhudism forbids it. Banning of alcohol was tried and repealed in the US already. One of the difficulties with banning alcohol is that it is extremely easy to produce. Many of us have even made it by accident by leaving a bottle of OJ in the back of the refrigerator for too long.

In the US cars are ubiquitous and we are, arguably, overly dependent on them. Cars help us work, play, see new places, connect with others, move goods, etc. Drastic changes in infrastructure and culture would need to take place to remove cars from our lives. We would have to revert to a nearly agricultural society if we removed cars entirely. I believe that a move to less dependence on cars would be good for our the long term survival of our planet since the production and operation of personal vehicles is resource intensive.

Cars are becoming safer every year. Many innovation and regulations are implemented which are undoubtedly saving more lives. I drove a rental the other day with adaptive cruise control, automatic braking, and lane assist. This car was not to far from auto piloting itself. Self driving cars are here and will be pervasive in a decade or less. These cars will shift culture dramatically and be orders of magnitude safer than our current machines. I foresee a future where non-self driving cars may no longer be allowed on the public roads. These new machines should nearly eliminate risks associated with DUI. As an interim step, ignition interlock technology has progressed and is used in many states for DUI offenders. To limit deaths by DUI sooner, we could mandate that ignition interlock devices could be installed in all vehicles, preventing the inebriated from operating them.



Semi-automatic weapons not have had a net positive effect on humanity. Semi-automatics may have helped some populations overcome others but in those events the outcome is essentially a zero-sum game for the parties involved and a net-loss for humanity as a whole.

DUI’s are accidents. Offenders are typically charged charged with man-slaughter as they did not intend to kill people. Their death, while still tragic is the result of the operators negligence. Perpetrators in mass shootings intend to kill people. Semi-automatics are the tool that easily enables them to carry out their intent. Other tools are available however the amount of research and preparation to build an effective bomb provide a higher barrier to execution.

Gun free zones are a nice idea but are not effective or enforceable. The borders are not clearly and consistently defined and there is no control in and out of the zones. Further, churches, movie theaters and concert venues are not gun free zones.

The current NICS background check system is poor at best. If you are not in the criminal justice system, it is easy to lie and not get caught. Current HIPPA laws prevent medical records from being searched. Form 4473's are not electronically recorded thanks to NRA lobbying so a person can fill out the form different ways to see what will work and authorities will be none the wiser. There is a gross misunderstanding about mental health in this country. Our mental health changes regularly just like our physical health. It is not a permanent state and it is a continuum with no clear boundary between of good mental health and bad mental health.

You can also purchase a gun without a background check. Under federal law, private-party sellers are not required to perform background checks on buyers. This is more commonly known as the gun show loophole.

Gun control is not a singular solution, but it cannot be ignored with a multi-faceted approach to prevent future mass shootings. I think that a ban on semi-automatic and fully automatic weapons and large capacity magazines is the right step for America and peace and human kind.

I invite your comments and opinions. Please adhere to the following guidelines.

Be respectful.
Be kind.
Be patient.
Stay on topic.
Please do not post memes.

Thanks!

Saturday, September 2, 2017

Talon Stick Clip

After about 9 months of development I put up the Talon Stick Clip for sale on Etsy.


Frustrated with expensive alternatives that need a threaded pole or home made clips using spring loaded clamps which seem to have too much or too little tension I developed the Talon Stick Clip over many iterations making 3D printed prototypes and testing them both in the gym and at Kentucky's Red River Gorge. The unique static camming action of the 4 fingers provide a secure hold and a quick, easy release with a slight twist.

Use 2 wraps of climbing tape to attach to any stick, handle or pole and safely get that first quickdraw up to reduce chance of a ground fall injury on your next sport climb. Works with most quickdraws with medium sized carabiners with wire or solid gates similar to Black Diamond Positron, Hotwire and Hoodwire, Petzl Spirit Express, Madrock Concorde Express and Super Tech Straight Gate, or CAMP Orbit Wire Express.

- Lightweight, 21 grams (0.75 oz),
- durable,
- easy to use,
- no moving parts,
- approx 5" x 2" x 0.8"
- Bumps on handle assure tape won't slip
- cammed claws and flexible support system hold carabiners securely yet allow for easy release

Photo instructions for use at: https://goo.gl/gajmWi

Climbing is dangerous. Seek proper instruction from certified guides or instructors.

Thursday, June 8, 2017

Affordable Belay Glasses

Belay glasses have been on the market for few years now typically floating near the $100 price point. These glasses use prisms to direct your sight 90 degrees upward so you can belay without getting a sore neck. Very convenient,

Curiously, lying down or MRI glasses have been around longer. These glasses direct your vision downward so you can lay on your back with your head flat and read a book without tiring your arms out. Also convenient. These have been priced between $10 and $20 dollars.

I actually purchased a pair of the MRI glasses hoping I could turn them around for belaying. This did not work out too well so I harvested the prisms and 3D printed reversed frames. This worked out ok but I figured i was only a matter of time before the manufacturers caught on and the price of the look up glasses would approach the price of the look down glasses.

Well, folks. That time is now. Amazon is currently selling 5 different pairs of belay glasses between $10 and $30.

The cheapest are only $9.90 but have poor reviews.

The Epic Peak Light Weight glasses have the best reviews and are currently priced at $18.99 with a case or $20.99 for case + neckstrap.



I can' t wait to try these out.

Check out my Climbing Shoppe  for these and other curated climbing gear available on Amazon.

Cheers!

Thursday, March 31, 2016

Solidoodle is belly up. These are your support options


I was sorry to see that Sam shut down Solidoodle on March 28th. Here is the announcement. http://www.solidoodle.com/blog.html

Seems like some of the solidoodle related sites went dark as well. In a scramble to capture as much info about these machines as possible I started checking related links.

As of today these are still active.

http://wiki.solidoodle.com/
http://www.soliforum.com/

I think the soliwiki is independently run so this should be around for a while.
http://www.soliwiki.com/

Software mirrors are here:
And the old software package, the All In One Pronterface+Skeinforge
Windows http://www.soliforum.com/downloads/soli … io_4.3.exe
SoliPrint v1.4.0 Does this even exist? Let me know in the comments.


Link list for other helpful sites:

Tuesday, March 31, 2015

Solidoodle Workbench Instructions


I purchased a Solidoodle Workbench 3D printer. It comes with very little instruction and not much step by step help online. Here's my attempt at a step by step instruction set based on my trials and errors. I don't work for Solidoodle, use these instructions at your own risk.

1. Unpack it carefully
- Place it on a solid table, desk, counter or workbench. It should reside on something that doesn't wobble around when you bump it.
- Remove tape and zip ties.
- Remove yellow shipping brackets from the rails.

2. Assembly
- Clip the glass plate to the aluminum bed using the binder clips. I have used 4 clips. One on each side, placed about 2 inches counter clockwise from each corner.
- Remove the top silver tabs from the clips to reduce the chances of the extruder hitting them during calibration and homing activities.
- Use the wingnuts under the print bed to visually level the printbed.  It does not have to be perfectly level. Do not bottom out the springs by fully compressing them.
- Insert filament holder brackets into the appropriate holes on the back of the Workbench. Insert piece of supplied PVC pipe into filament rolls and place pipe onto the brackets.
- The end of the filament can be fed into the holes near the top of the rear of the Workbench case.

3. Lubricate 
- Lubricate all rails and z-axis screw drive with 3 in 1 (sewing machine) oil if they are dry.  Solidoodle recommends using lithium grease. I've tried both. I think the 3 in 1 oil provides better lubrication but may have to be applied more often.

4. Belt Tensioning
Don't skip this step. Chances are the Y-axis is out of alignment due to packing, shipping, unpacking, handling etc. Follow these Belt tensioning instructions before even turning it on. The pulleys on the workbench us a 2 mm hex key as opposed to the 1.5 mm mentioned in the instructions.

5. Power up
- Find an old computer power cord to plug into the power supply.
- Plug power cord into power supply and plug into wall.
- Plug both power supply cables into the printer. .

6. Connect to printer
- Plug printer into computer with USB cable.
- You may need to install this driver for windows. Details pertaining to driver installation are here.

7. Software
- Download and install the Repetier Host Solidoodle software.
As of 4/1/2015, Soliprint does not work with the Workbench model. 
- If you have problems with the software quitting unexpectedly, you may need to install this particular version of the arial font. 
- Other troubleshooting tips can be found on the repetier website.
- Launch Repetier-Host Solidoodle. Select Solidoodle Workbench from the Connect dropdown menu. If successful, it should say connected on the bottom left of the screen.

8. Calibration
- Go to the Manual Control tab.
- Click the Home X and Home Y buttons so the printer can find the endstops for self calibration.
- Use  the -X and -Y arrows to move the printhead toward the center of the bed.
- IMPORTANT: Push down Solitouch probe on right side of printhead so it extends below the print nozzles.
- Click Home Z. The printer will lower and then raise the print bed until it touches the probe.
- Now you should be able to move the print head and bed by clicking the arrows.
- Solitouch bed measurement is part of the printing process and will take place before each print.

9. Heat up the bed and the extruders
- Click Heat Extruder and Heat Printbed on the Manual Control tab.
  For ABS I have been using 215°C for the extruder and 100° for the bed.
  For PLA I have been using 200°C for the extruder and 70° for the bed.
 - At these temperatures and with using a light coating of Aquanet hairspray on the glass, I have had no problems with getting the first layers to stick.

10. Level the Bed
- Solitouch bed measurement is part of the printing process and will take place before each print. however starting with a reasonably leveled bed will produce more consistent results.
- Use the thumbscrews under the bed to adjust the bed height. Level is a bit of a misnomer because level with respect to Earths gravity is not as important as making sure the plain of the printbed is parallel to the plain that the printhead travels in.

I've found a good way to do this is as follows:
  1. Twist the thumb screws clockwise as much as possible to lower the glass as close to the z-carriage as you can reasonable get. 
  2. HOME the Z-axis with the printhead near the center of the bed. Make sure the solilouch probe is in the down position before homing. 
  3. Manually lower the printbed a few millimeters. 
  4. Move the printhead so the solitouch probe is close to a thumb screw.
  5. Turn the thumbscrew counterclockwise until the bed contacts the switch on the probe.
  6. Manually move the printhead probe to the next thumbscrew and again, raise the bed with the thumbscrew until contact is made with the probe.
  7. Repeat this for the final 2 thumbscrews, then repeat it a second time for each thumbscrew.
- Soilitouch uses a programmed distance between the probe and the printhead using the M851 command. My Workbench's default value is 7.0mm. I've found that this is way too much and first layers of prints fail because the printhead ends up too close to the bed, squishing the extrudate or blocking it from flowing altogether. I've had much better luck using a value of 6.0mm which can be changed by typing M851 z6.0 in the Gcode spot on the manual control tab in Reptier-Host. Unfortunately this adjustment does not stick. It will revert back to the default so check it prior to each print job.

10. Load Filament

- Once the extruder comes up to temperature, click the Retract button a few times to remove the piece of filament left in during shipping.
- Clip off the end of the filament you are going to load if there isn't a clean break.
- Push filament in the hole while clicking the Extrude button.You may have to click a few times until the extruder catches the filament and it starts to self feed.
- Continue clicking the extrude button until the new color of filament comes out of the extruder.
- Use tweezers or a scraper to remove extruded filament from the nozzle.

11. Load STL Model
- Choose an STL model from the the Solidoodles website, Thingiverse or one of your own. My first print was this calibration cube. It's simple and only take about 20 minutes to print.
- From the Object Placement tab, click Add Object and select your STL file.
- Click the Slicer tab.
  - Click Active under Slic3r
  - Select print setting (0.1, 0.2 or 0.3)
  - Printer Setting should be Solidoodle Workbench
  - Extruder Settings should be Solidoodle 1.75
  - Click Slice with Slic3r.

12. Printing
 - I spray a light coat of Aquanet hairspray on the glass print bed to aid with sticking. Aim the hairspray away from motors and electronics. It has been reported that Elmers glue stick works well also, but I have not tried that yet.
 - Check that extruder and printbed are up to temperature.
 - Make sure Solitouch probe on the right side of the prinhead is in the down position.
 - Click Run Job.
The Workbench printhead will move to from the north east corner to the southwest corner and pause.  - Click Continue Printing
The Workbench will go through the Solitouch bed measuring. Mine measures 16 points. After measuring the last point, the bed will raise about 7mm and push the Solitouch probe up. It will then start printing your model. Sometimes the probe does not click up into place so keep an eye on it and give it a hand if needed. If the probe does not pop all the way up it may drag through the newly extruded material and ruin the print.

13. Problems during printing
Actions to take if things go wrong.

- The Emergency STOP button in Repetier-Host doesn't seem to do anything. Don't rely on it.

- PAUSE the print if you need to make a minor adjustment or temporarily interrupt the print for some reason. You can use Manual controls during a PAUSE and on resume your print will continue where it left off. You may even pause to change or reload filament.

- KILL the print if you need to start over from scratch. I usually do this if I don't like the way the first layer or two look or if there is a problem with sticking. When you kill a job the printer will finish the last command that was sent and then Home the printhead. REMEMBER when you kill a job, Repetier shuts down the heater on the bed and the extruder. You will have to turn them back on under the Manual Control and wait for them to reach their setpoints before restarting the job.

- PULL THE PLUG if you hear motors grinding, the printhead crashes into something, you see fire or the printer exhibits other self-destructive behaviors.

14. Post printing
When the print completes, the bed will lower, the printhead will return home and the extruder and printbed heater will shutoff.
 - Remove your model with the putty knife or a razor blade scraper.
 - Clean the glass off with the scraper or razor to get ready for your next print.
If everything went well you should be able to jump back to Step 9 to start the next print.

15. Optional Enclosure
To help with temperature stability and conserve some energy, consider enclosing the Workbench. Enclosures are often made with plexiglass acrylic which is transparent. Less expensive alternatives like cardboard or foamboard can also be used. Panels for the sides and front should be removable and can be fixed to the frame with magnets, tape or clips of some sort. I designed and printed a clip for this in Sketchup. For the top, I use 3 pieces of oversized overlapping foamboard resting on the frame. This allows the printhead to push them around as needed. If you want to fix the top to the frame you will have to design it as a dome so it does not interfere with the printhead.

Please add your own tips and comments from your Workbench experience.

Good Luck






Wednesday, May 21, 2014

How to Keep your audience awake during a 6.5 hour seminar

I've been recently hired to present a 6.5 hour seminar for architects and engineers. I two engagements for the same seminar. The topic is interesting enough for the audience. I have already presented one hour of the presentation for a previous gig. I have a skeleton outline for the rest.

Objectives:
1. Flesh out the outline with the facts that I need to get across.
2. Get this into some presentation software/platform.
3. Create content.
4. Make it interesting.

The general mo in the industry is show a table of contents, slog through the data/procedures/examples, then repeat in summary fashion what you just presented. I find this style tedious and boring to listen to. It's a tired style. I enjoy This American Life and TED talks. These contributors of content tell engaging stories.

Objectives 1, 2 and 3 I can handle. Numero 4 is the challenge.

I need to find the stories of shallow foundations.

to be continued...

Here are some articles I found with useful presentation tips.

http://hbr.org/2013/06/how-to-give-a-killer-presentation/ar/2

http://www.copyblogger.com/boring-topic-content-marketing/

Update March 31, 2015

I've given this presentation about 6 times and have received good reviews. Some things I have learned that work well:

- Approach the presentation as a dialogue with the audience. Keep it as interactive as practical. Ask questions. Answer questions. Don't be afraid to let the topic drift a little to cater to the audiences interests.

- Get to know your audience in the first hour and adjust your pacing and material based on their appetite.

- If you don't know the answer to a question from the audience, ask the audience for help. This encourages discussion and information exchange and everyone comes away with something more.

- Draw. I purposely have not included all of my figures, drawings, sketches in the powerpoint presentation. I draw at least 2 sketches per topic on a white board or flip chart using colored markers. This engages the audience, adds a small element of suspense, keeps me focused on the material and gives flexibility to address the topic from different angles.

- Review the material after the presentation. Adjust notes, slides, diagrams etc based on what worked well and what fell flat. Each time it gets better and easier.