Saturday, 30 January 2016

Archery Target Frame build and Target Core repair

= Disclaimer =
This is not a tutorial nor a step by step guide. this article is meant for clubs, experienced archers and makers as reference material.


Alright, so, our club bought some new targets and the old ones had to go. the cores were pretty much gone but the outer circle was still usable.

I salvaged some high density foam from another old target and used gel contact cement and a brush to apply it to each layer as I rolled the foam. having someone around as an extra hand in this step will help you a lot as you need to roll the foam pretty tight and foam will fight you back :) once rolled to size (just about a centimetre oversize actually to get a snug fit) tied it up with a few straps tightly and let it sit to dry for a week or so. core goes in as you see here.



In the meantime I went about making the frame/stand for the target, I used 4.5cm x 7cm treated pine and a sheet of 9mm marine grade plywood. I used galvanised hardware, if you can spare the cost go for stainless. 

This is the plan and dimensions I took off of club frames. keep in mind to get the target centre height right (for competition standards) for different targets you may need to modify the height a little.


Three items that are not shown here are ground anchors:

Target needs to get tied tightly to the frame, we tie the targets to frame by a piece of rope and using the four rope loops you see on the target, from the back tied ropes would look like a plus sign.

To reduce the risk of target toppling over when people are pulling arrows we always anchor our targets with a 4m rope from the top of the frame on the back side to the ground with a large (40cm x 12mm) peg. the peg needs to go to the ground in an angle pointing away from the frame to support the rope properly.


Lastly, we had eye bolts on the lower side of the legs to peg the frame to the ground directly if need be. we rarely needed to use those though.



As for the rest of hardware bits used:

Bolts for the hinges on the top of the frame
I used 2 long bolts with 2 nuts and 3 large washers each.
They go on like this:
bolt head > washer > timber > washer > timber > washer > nut > nut

The main idea here is to have a washer between the timbers to let them slide easily and act as a hinge.
As for 2 nuts that go on each bolt, the first one is the nut and the second one acts as a lock nut, you need to put the first nut in and move it to where you need it, then hold that nut with a wrench and tighten the second nut onto the first, that would lock them in place.
Obviously there are other ways of doing this as well.
 

For the target support bars I used 2x50cm pieces of medium duty 2cm x2cm square tubing. they were attached by 3x7cm roofing screws each , 2 to the side and one to the top.

In this case I didn't need the bars to be removable, if you need them removable (so you can easily put it in storage) then you got to make a pocket with a larger steel tube to accept the support bar. you also need a pin or similar solution to hold the bar in place, you do not want the bars to move on you or fall off. target itself weights over 30kg, the frame is not much lighter either.





As for the rest of screws, Used a bunch of 4cm chipboard screws to attach the plywood to the frame, those plywood triangles help a lot with making the frame rigid.

Also a bunch of 15cm self drilling Bugle Head Batten Timber Screws to screw the frame timber itself together, 2 for each joint. these are a bit overkill but they were needed since I didn't want to use any fancy wood joining techniques or wood glue.






=====>> Source files are here <<=====


And here are some additional pictures of the build for reference.





Update:
2 years on in the open and no sign of wear on the frame


Friday, 4 September 2015

Rotary/Quadrature Encoder Hi-Res and Vector patterns

Hey all,

I designed these Optical Encoders a few years back for a project I was doing. you can print these on transparency sheets and depending on the pulse rate and accuracy that you need you can cut the outer grids off. for printing use the PDFs or Adobe Illustrator vector file below.






To read these properly you will need to use an Optical (phase) Encoder. OE will let you do single and double precision count as well as detecting the direction of rotation.



I originally intended to use them with photo-interrupt type sensor. while it worked it was not very accurate and had no direction information available, and that sometimes is good enough.
With a slit window and good amplification you can use them with reflection type sensors as well, in which case you might want to print them on white sheets.




Sunday, 30 August 2015

Kitchen Island? "yes, we can!"

So, decided to make a hardwood (merbau) kitchen table/island for additional storage and work surface, because why the hell not! :p . garage wasn't the best work space but at the end it worked out.
I can't be bothered with drawing a model of it as it's already done but if you want information or a model drop me a line, I should be able to put something together. (this table is made from off the shelf items sold at  Bunnings)









UPDATE:
Now there are two of these in existence and the original is holding up great after almost 3 years :p 

One of those days....


One of those days (more like everyday nowadays)


Monday, 20 July 2015

Phone backdrops #01

Here are a few backdrops I put together a while ago for my android phone, really simple and abstract

Colouring pages #01

Did a bunch of paint bucket colouring out of boredom, nothing spectacular, they need a home so gonna leave them here (blank images are from the interwebz, credit goes to the original artists)

Tuesday, 20 January 2015

Mechwarrior Online (MWO) controler options

Hey guys,

So I have been playing MWO in the past few months and figured I should share my somewhat uncommon setup


so I use four different inputs:

  1. Keyboard
    obviously comes handy for in-game chat
    keypad for weapon groups management
      (2 down,4 left,6 right,8 up, 5 select, 0 sequence)
  2. Mouse
    targeting
    mouse one and two for weapon groups one and two
    scroll for zoom and mouse 3 for zoom reset
  3. Joystick for flight and fire controls
    Logitech Extreme 3D Pro Joystick $70AUD, seen them for $30 on ebay
    B1: weapon group 3
    B2: team IDs
    B3: UAV
    B4: target lock
    B5: air strike
    B6: ECM mode
    Hat up: map
    Hat down: scoreboard
    Hat left: thermal vision
    Hat right: night vision
    Y axis: forward and back movements
    Z axis: torso turn
    also mapped a few rarely used controls to side keys
  4. Footswitch for very common control functions
    3 switch foot pedal $37AUD
    S1: jump jets
    S2: arms unlock
    S3: advance zoom

I use the mouse on right hand, joystick on the left hand and both feet on foot pedals. also I replaced the left armrest of my chair with a flat base that lets me put the joystick in it's place. very comfy for long sessions.


considering the number of controls expect a steep learning curve. that said, once you get comfortable it's very nice. don't expect miracles!, these would not improve your gameplay by much, however they did gave me a more natural feel and better sense of immersion. "real" mechs are piloted by joysticks and foot controls afterall! :P