Yoonseo Log 2012
November 2012
Testing new log strategy...
21/11/2012
Sweiger trip with Gabi (CEB Press, Caster, Light Screen)... done
CEB Press Electronics - Circuit Assembly... done
Terminal Case... that perfect tungsten end is really tough to get -_-
From WeldingTipsandTricks stuck with 2% thoriated for a long time. It worked great ... but on A/C the tip kind of got jacked up at high amperage. I tried 1.5% and 2% lanthanated and learned that both work fine but the 2% lanthanated works great and even better on A/C. And For TIG inverters like the Miller Dynasty 200dx or the Lincoln Invertec v205t, it is Da shizz.
It holds up really well at high frequencies like 120-150 HZ.It stays sharp on DC too.
The only drawback is that is does not break easily...you have to cut it with a grinder. Duly noted. Thought I was doing something wrong by having to grind-cut the lanthanted but guess that's standard practice.
20/11/2012
Hablab Cleaning! Jacob is coming.
Make Terminal Case... Needs argon gas refill, new ceramic cups. Make a light tack weld. Then, starting from 1 end (but give enough space for the other aluminum walls), get a junction puddle (between baseplate and wall) then travel along junction edge. Filler adding technique is to insert the filler rod at the junction edge coming from the opposing direction as the weld. Keep the weld small and tight. If for some reason the weld turns big, skip it and do the junction puddle + edge travel again. You can grind off the big part and reweld the gap later.
When balling the tungsten before welding, set material-to-tungsten electron % higher and the current lower instead of just increasing the current. This will keep the copper plate cooler while still heating-balling the tungsten correctly. Make sure that the end of the tungsten is a ball.
Make PCB Mount...
19/11/2012
Make Hall Effect Sensor Module x2... done
Test Hall Effect Sensor Module x2... done, both operational.
Make Solenoid Driver... done
Prepare for making Terminal Case... done
Organizing personal information at Yoonseo Kang...
Organizing development webpage at Open Source Technologies and adding material supplier links...
Coconut Oil Tests as Cutting Fluid
Ordering Coconut Oil... done Haha! This will be fun! You can eat it, you can machine with it!
Safety and health is incredibly important at the minor level because hazards that take off years off your life are actually cutting, say, 5 years of living in *the future*, at which point you can be doing things x10000%+ higher quality and faster than you are doing now. Furthermore, you would be missing out on 5 years of health and safety innovation in *the future* which could further extend longetivity and ability by orders of magnitude more. Critical stuff. Don't miss out. Safety and health gives you a lot more than you might realize, and you don't notice that you haven't been seriously injured so it doesn't enter your mind that much. Chronically underestimated factor of life...
Ordering earmuffs (we are darn low on these, and disposable earplugs aren't that great as a cluttery consummable)... done
18/11/2012
Deploying Magdrill x2... done
Design Boxed Way machined dimensions...
Order aluminum flat for Hall Effect Sensor Module x2... done
Prepare Terminal Case welding for CEB Press...
Organize Drill Bits...
Ordering Labels... done
17/11/2012
Hablab Ground Insulation Day
Documentation feedback for Chris Olah regarding www.implicitcad.org... done
16/11/2012
Upload Tooling Plate Documentation... done
Make Surface Grinder Video... done
Power Cube VII Electronics... awaiting someone to mount battery, solenoid and reveal 2AWG copper stranded wire
Upload Surface Grinder Video... done
Ordering Hall Effect Sensor... done
Stove sealing - Cement the gasket to the front top frame... done
Asking Andy about submersible pump wiring splice... done
Ask Josh about any available 120VAC/240VAC hydraulic power supplies... done
Website Setup Documentation
Get ImplicitCAD to Inkscape with Gcodetools for gcode toolchain working error-free... done
15/11/2012
Make Tooling Plate... done
Ordering Steppernug x6... done
14/11/2012
Organize CEB Press Electronics Materials... done.
CNC Torch Table V2 Test 1... Y Axis jog test success. Needs 2 more steppernugs for complete control. y axis gear setscrew needs tightening.
Design C Clamp with linear interface for Hall Effect Sensor Module... done. Might end up better to just use off-shelf C-Clamps despite 2-piece assembly until C Clamp fabrication efficiency increases.
Contact Chris Olah about ImplicitCAD use instructions... done
Ordering Power Supply... done
Contacting Darren about Steppernug... done
Ordering Solderable Breadboard... done
Ordering LEDs and MOSFETs... done
Test ImplicitCAD... done
Test Gcodetools... Inkscape internal errors?!
Ordering small C Clamps... done
Designing Funnel...done
Ordering Aluminum Tube... done
Fixing Ubuntu Shutdown... no good File:Grubexamplefix.txt sudo shutdown -P now
Ordering Aluminum Sheet... done
Ordering Gasket for Stove... done
13/11/2012
CEB Press Electronics Coordination 1:30pm with Marcin... done
Power Cube VII Electronics... needs more touch safe terminal blocks
Laundry trip... done
Battery bank is too low for workshop use...
Organized Workshop with Drawers
Ordering touch safe Terminal Blocks... done
Ordering iron for Boxed Way... done
Ordering Flashlights...done
12/11/2012
Power Cube VII Production Run with Others Day 2...
CNC Electronics Wiring... done
Computer to Microcontroller troubleshooting...
http://code.google.com/p/processing/issues/detail?id=151
http://stackoverflow.com/questions/6459042/processing-how-to-write-to-the-serial-port
CNC troubleshooting... success.
Documentation spree.
Tooling Plate Fabrication Drawing
11/11/2012
Power Cube VII Production Run with others
CNC Electronics Mounting... done
Personal reminder that the Boxed Way module can be used as linear guides for Lathe
Ordering Annular Cutters... done
Began Computer Platform
10/11/2012
Power Cube VII Materials Preparation with Tom and Marcin... done
Bandsaw blade replacing with Kavitha... done
Power Cube VII Production Run Preparation... done
Bandsaw blade replacement video... done
Use Gparted with a live cd or usb in order to repartition your computer's internal hard drive.
Began Adjustable Platform
Designing Caster... done
9/11/2012
Ordered Portable Light
CNC Electronics Wire to Terminal Tech... tinned wire vs fork connector resolved...
CNC Electronics Intra-connection Tech... male/female headers with twist connectors for now...
Analyzed on-site cordless chuck drills... no good. low torque and frustrating battery removal
Ordering Gloves... done
Documenting Extension Cord assembly... done
8/11/2012
Fabricate PCB Mount compressors... done
Install PCB Mount compressors... done
Deploying organizing drawer shipment... done
More drawers... ordered.
CNC Electronics Wiring Prep... heatsinks mounted, mounting holes drilled.
Ordering mcmaster-carr shipment (edge finders, iron for Tooling Plate, cable gland and rubber rod for Terminal Case)... done
7/11/2012
Ordering LIN steppers... done
Fabricating stove interface...done
Deploying (installing) stove door... done
Documenting stove door at Modular Stove Fabrication Procedure... done
Deploying extension cord shipment... done
Wrapping up hospital bill... itemization sheet on its way from hospital.
Ordering measuring tapes... done
Ordering wire... 18 gauge 500' red, 500' black ordered.
https://en.wikipedia.org/wiki/Nichrome
PCB Mount HDPE Plate cutting... done
Ordering hex to chuck converters... done
PCB Mount Mounting concept... done
Researching iron suppliers... mcmaster-carr is a supplier (http://www.mcmaster.com/#iron-sheets/=k2j66h)
http://www.wwgoa.com/articles/one-great-tip/do-i-really-need-an-impact-driver/
http://toolguyd.com/you-can-use-an-impact-driver-to-drill-holes-but-should-you/
http://www.candlepowerforums.com/vb/showthread.php?258999-NiMh-AA-Powered-LED-light-Current-Draw
http://batteryuniversity.com/learn/article/serial_and_parallel_battery_configurations
6/11/2012
240VAC Extension Cord... done
Food trip with Parker... done
TIG Welding Setup Video... done
CNC Torch Table mechanical assembly finishing... done
Ordering more winterwear... done
Ordering screwdrivers... done
Powercube Troubleshooting with Graham... fixed. The fuse was loose.
5/11/2012
Sweiger Trip for powercube/lathe accessories + stove metal. Done. Sweiger does not supply or have connections for iron.
Ordering more extension cords... 25ft x3, 50ft x2, 100ft x1 (Yellow Jacket from Amazon)... done
Ordering mass discrete component organizers... done
Wrapping up hospital bill... no response, message left.
Saw Blade Store response to order question... done. they were just confused with billing/shipping addresses
Septic system troubleshooting... fixed.
4/11/2012
Group clean Hablab!
Pictures for Light Screen, Trencher, Flashlight Mount
Light Screen from Josh missing a few parts - must search in Tristan's car...
CNC Torch Table Steppers' electronics interface wired up.
Set up camera tripod
Terminal Case interface with PCB mount...
Ordering HDPE plate for CNC electronics... done
3/11/2012
Tooling Plate fabrication preparation...
Terminal Case V3 welding... done - TIG welding aluminum isn't TOO hard...
We'll need to recharge our argon canister soon. Medium size canister is easier to transport, but must price check on medium and large refills.
Design, prototype, documentation Thermal Shield for TIG welding... done, done, and done
Preparing for next sweiger trip. Lathe/powercube accessories, iron for tooling plate, metal for stove door, pure argon gas refill... done
Must order edge finder (ex. from mcmaster-carr), but waiting on further items to optimize shipping.
Husking Walnuts!
http://www.cnccookbook.com/MTLatheCNCAccuracy.htm
http://www.gearsolutions.com/article/detail/5663/the-details-of-ductile-iron
Hinge redesign for stove
2/11/2012
New stove door design... mostly done.
Ordered aluminum bar for Terminal Case V3 construction (with welded seams for rigidity and waterproofing)
Tested and documented Trencher V1.5 with Aaron. It works pretty good!
Began TIG welding Terminal Case. Started using filler rod for the first time. The aluminum gets HOT. Don't touch it, even with gloves you will get burned. Cannot TIG weld continuously without heat shield. Must design heat shield for hand.
We need more 240VAC extension cords. Must order male and female plugs, as well as more large 3-strand wire.
Ordered 2 bandsaw blades
http://www.stepperworld.com/Tutorials/pgBipolarTutorial.htm
Stepper Motor considering: bipolar super torque steppers from Lin Engineering (http://www.linengineering.com/LinE/contents/stepmotors/5818.aspx)
Flexible shaft coupling considering: from http://www.mcmaster.com/#standard-shaft-couplings/=jzypil
Plan: organize drill bits
Plan: work on improving flashlight mount - magnetic mounting, adjustable angle
1/11/2012
TIG Welding tests... still no good. Grinded the aluminum and reduced the length of tungsten alloy tip sticking out to 1/8" but instead of puddling properly the aluminum totally melts underneath a film of oxide...
Bandsaw blade ordering [Emailed Parker and Marshall for previous bandsaw blade source]...
Thiel Fellowship monthly review... done
Thiel Fellowship annual update... done
Sweiger trip with Gabi for farmer's bank credit card form, powercube materials and TIG welding troubleshooting... success, success and success.
TIG welding aluminum test... success! Minor change was to mount the tungsten collet in the opposite direction. The major change was to ball the end of the tungsten by applying some high current 150-200A at ~50% AC balance to the tungsten tip but using copper plate.
Prototyped flashlight mount.
October 2012
31/10/2012
Workshop organizing.
Ordered fittings for water infrastructure, screws for CNC Torch Table
Cold Saw Test 3- clean cut, successful automated cooling, lots of vibration.
30/10/2012
Kdenlive Codecs Troubleshooting -
Mpeg-4 Resolved. Installed the mp3 encoding library "lame" using synaptic package manager, then opened kdenlive and went settings>run config wizard, then was able to render in mpeg-4.
Installed libavcodec-extra-53 and reran kdenlive config wizard and further render options enabled.
Ordered 4 welding helmets from Harbor Freight- http://www.harborfreight.com/blue-flame-design-auto-darkening-welding-helmet-91214.html
Ordered from Mcmaster-carr:
T Slot Cutter: 8789A12
Reduced Shank Endmill: 8827A19
Roughing Endmill: 8817A52
Touch-Safe Terminal Block: 7618K618
Terminal Block: 7527K53
Organized Workshop - deployed more tables, mechanical assembly of cnc torch table almost complete - awaiting screws to be ordered.
https://en.wikipedia.org/wiki/Gender_of_connectors_and_fasteners
29/10/2012
Ordered supplies
Troubleshooted plasma cutter - it works! Changed control connector to more compatible interface.
Video'd
Realized tripod is absolutely necessary to take video because 1 handed everything just doesn't work. For the same reasons, flashlight mount is crucial for nighttime work; headlights interfere too much with welding helmets and such.
Ordered tripod
Designed flashlight mount
28/10/2012
OSE general topic meeting
Organized workshop, fitted flats in cnc torch table
27/10/2012
Welding woes... TIG welder does not work even with the 2% lanthanated tungsten...
Organized workshop.
Designing Boxed Way
26/10/2012
Fixed tractor hose leak.
Organized workshop.
Boxed Way Fabrication Preparation
25/10/2012
Boxed Way Way-to-Base and antifrictionmaterial-to-saddle info acquired. Blocks - iron supplier and machined leadscrew supplier...
Finished up installation of stove. Review and modifications in progress- sealing all top gaps and replacing front door mechanism with hinge + latch.
Workshop Tools for hardware transparency and ease of analysis.
24/10/2012
With Aaron: picked up Gabrielle from bus station, acquired some winter gear, acquired Fairshare Farm food.
Wood Stove Deployment Run, Day 7 with Aaron. Installation almost complete (flue pipe hole needs to get cobbed up some more). Tested with big fire in stove. Success - flue has no leaks. Near complete combustion. However... chain handle is dangerously close to front panel (<1") at 100 degrees celsius (water boiling point)- burn hazard. Front panel acting as door is difficult to open- non-ergonomic. Leaks in top panels and front panel causing great smoke especially during the fire startup process before a draft is created. Rebar damper gets too hot to touch- safer damper handle necessary; damper placement could be better, placed to the side of the stove instead of over the top panel. But... the fire burns, the thermal energy radiates. Warmth!
Analyzed inverter electronics - we are much closer to the universal power supply (any input, any output) than we previously thought.
Deployed more tables in workshop and organized tools for superb accessibility during production runs and open tech development.
... accidentally erased the latter half of the stove pictures in the camera... darn...
Ordered sheet metal power shear
Contacted Gilman USA about way-base adhesion
Updated boxed way diagram
23/10/2012
Wood Stove Deployment Run, Day 6 with Aaron. Flue fabrication complete. Installation in progress.
Plastic welder test. Success.
Inverter Control Waveform Diagrams
Ordered Copper Clad Board
22/10/2012
Wood Stove Deployment Run, Day 5 with Aaron. Got all the materials from Sweiger, established full design, completed long assembly.
Inverter documentation with Aaron.
Workshop organization. Deploying lots of tables.
Ordered aluminum rods, tubes, bars.
Ordered bench grinder.
21/10/2012
Discussed budget creation process with Aaron Budget Creation Process
Organized Workshop
Laundry and food trip.
Ordered various fulcrum hand tools.
20/10/2012
Wood Stove Deployment Run Day 4 with Aaron. Took lots of pictures and videos. 400MB+!. Spent lots of time designing and preparing fabrication and looking for tools that we didn't find after all. Time for technological saturation. Quality tools will always save the day. Bad tools, no matter low prices, are super-expensive in practice... but not having tools is worse.
Time to order some more tools and materials... Metal protractors. Bronze rod.
Oxyacetylene Torch vs Plasma Cutting
19/10/2012
Mcmaster-Carr Helical Beam Couplings
Received C Clamps and Tables
Replacing back wall of chicken coop with Parker
Wood Stove Production/Deployment Run Day 3
Received and deployed digital camera
Ordered AA Battery Holders
Fablab Tool Organization
Searching for a leadscrew and leadscrew nut supplier that provides end machining services
Tested Geiger Counter
Sent torch table pictures to Chuck Harrison - Internet connection timed out, resending in multiple emails... Success,
Ordered more tables. Extremely useful.
Researching animation software...
Sintel- Blender-animated Short Film
Researching Vises...
Responded to Kevin Harrington (Kevin Harrington at Neuron Robotics)
18/10/2012
Received batch of shipments
FFmpeg GUI for screen capture: Screencastor
Screencastor Installation Guide
Wood Stove Production Run Day 2
Trying to install screencastor... Success. How about also XVidCap?-Marcin --- screencastor is just a screencapture GUI for ffmpeg and ffmpeg is much stronger (more configurable, more codec support, higher max video quality) than xvidcap-Yoonseo
How to Remove Repositories in Ubuntu
Researching shaft coupling type between leadscrew and stepper motor. Flexible couplings (helical slit type) used to accommodate slightly misaligned shafts.
Requested 5618L-54P stepper motor quote from Lin Engineering
17/10/2012
Learning with Aaron about plasma cutting- Everlast PowerPro 256
Setting up FFmpeg as screen capture for video recording of desktop
Pre-Production Run Preparation for Wood Stove with On-site Team
Wood Stove Production Run - Learned how to plasma cut!
Ordered welding magnets
Installed Cinelerra and Kdenlive
Starting Google Sketchup
16/10/2012
Ordered self-adjusting clamps and pipe clamps
Troubleshooting internet - testing wired connection to router.
Mechanical diagrams for CNC Circuit Mill
Ordered plastic welder
Contacted flexsoundproofing for free welding screen sample.
Acquired food and cast iron kitchenware with Aaron and Parker
Discussed OSE Specifications with Aaron
Called Everlast for TIG Welder troubleshooting - pure tungsten is not compatible with inverter welders' square waves and must be replaced by lanthanated or ceriated tungsten
TIG Welding Tungsten Electrode Current Test
Ordered 2% Lanthanated tungsten 3/32" x 7"
Tested TIG welding steel to some success with pure tungsten.
Ordered wire brushes x3
Ordered tables x2
Internet soooooo slowwwww... Efficiency at <10%...
Point and Shoot Camera Buying Guide
Outdoor Rugged Digital Camera Guide
When getting any portable, data-focused electronics (meaning you need energy storage and data storage), consider the following 3 factors to be the most important:
- Uses common replaceable batteries. Ex. AA batteries. Necessary for ease of continuous use (otherwise it will sit collecting dust, you never having the time or money to spend on getting another proprietary battery; also makes charging/having extra charged batteries much less of a hassle).
- Uses common data storage cards. Ex. SD cards. Necessary for ease of compatible use. Last thing you want is to be unable to transfer your pictures and videos to your computer.
- Is rugged! Expect falls and pressure, immersion in water, extreme temperatures, and more.
Ordered SDHC card 16gb
Ordered Camera
Ordered many AA and AAA batteries Enerloop Batteries
Ordered Smart Battery Charger
15/10/2012
TIG Welding Advanced Settings 2
TIG Welding Advanced Settings 3
TIG Welding Advanced Settings 4
TIG Welding - Getting a Puddle
TIG Welding Residue Troubleshooting
Completed Thiel Fellowship review session
Ordered wire strippers, welding gloves, work gloves
14/10/2012
Heidendan Vertical Machining Center
Feeler Taiwan Vertical Machining Center
Mechanical diagrams for CNC Circuit Mill
Shaft Collars and Rigid Couplings
How to connect two shafts together - use shaft couplings. A shaft coupling has 3 main considerations: how does it connect to one shaft, how does it connect to the other shaft, and how does the coupling connect in the middle? Shaft connection-wise, unless a weld is made (molecular bond between the coupling and shaft), either setscrews are used to tension down on the shaft, OR, a screw is tightened on the wall of the coupling to clamp the coupling on the shaft.
Make Project Article with nice stepper motor to ballscrew pictures
Based on everything I've learned so far about precision machine design: Precision Machine Design Tips
Preparing for Thiel Fellowship review
13/10/2012
Recoveredering from minor sickness
Troubleshooting internet slowdowns - Tomato Wikibook - Success!
Winterizing, organizing, cleaning Hablab with others. Great results.
TIG welder argon flowing! Solution was to use hose clamps on the regulator barb and machine barb.
Huge C Clamp order.
12/10/2012
Successfully troubleshooted hablab internet system
Oscilloscope on Arduino with Direct Digital Synthesis
Acquired tungsten rods and foods
Prototyped and documented Light Screen
Continued setting up TIG welder - argon not flowing?! - ah read the manual File:TIGTorchmanual.pdf and should try adjusting the knob of the regulator with a wrench.
Ordered 3/4"MPT to 3/4"FPT Lead-Free Brass Elbow
Ordered Geiger Counter after thoriated tungsten spook
Thu Oct 11, 2012
Inverter Development - Extent of Arduino's Functions
Successful materials for Light Screen from Sweiger Shop with Gabi
Setting up TIG welder
Pure tungsten is appropriate for AC TIG welding (ex. 99.5%+ tungsten)
TIG Welding: Tungsten Electrode Guide
10/10/2012
Inverter Development - Further topology development at Inverter Log and learnings from Buck Boost Converter at Wikipedia
Discussion with Alexander Kiselev
CNC Circuit Mill Electronics Sourcing Research - Stepper Motors
Dynamics of Hybrid Stepper Motors
Winterizing items
9/10/2012
Organized Inverter development documentation
Produced and documented Terminal Block x2
Journey Inside the Cell: Information to Proteins
8/10/2012
Ordered more power strips and a light for the hablab
Fix for Ubuntu 12.04 Stuck at Shutdown
Successful food acquisition trip with Gabi, Graham, and David
Successfully uploaded GRBL to Arduino Uno R3 using Ubuntu 12.04 - followed documentation from before, adding ruby and avrdude installation steps
Successful troubleshooting of Powercube V6 with Graham - faulty relay, temporary fix with connector-to-connector switching solution
Successfully started coordination of Inverter development, with the Inverter Log with Aaron
7/10/2012
Preparation for winterizing and organizing personals.
Civ5 and starcraft LAN party. Great mental exercise- lots of information processing.
6/10/2012
Mainly group construction work- sealing up gaps to winterize the hablab and organizing the backroom for better tool accessibility
Ordered various electronics parts for CNC Circuit Mill V2
5/10/2012
Specifying and hyperlinking mechanical/electronics/software for CNC Circuit Mill V2
Minor revisions to documentation presentation for the electronics projects in Open Source Technologies
Research into motor selection for spindle designs at Electronics Design Info
4/10/2012
The way to prevent premature latching on the CEB Press is to keep the hall effect sensors mounted parallel to the magnets' moving plane. This resolved all premature latching issues. CEB Press 4.0 fully operational. Optimized CEB Press Testing and Operation Code: CEB Test and Operation Code
Restocked food inventory.
Performed first aid and health operations on hurt/sick members of on-site team. Arrythmia and pre-hypertension concerns.
Improved documentation for the CEB Press
Ordered more aluminum flat bar, mainly for Terminal Block production
3/10/2012
Installed Hall Effect Sensor Module x2 on CEB Press V4.0 with bent pieces of aluminum flat bar and small C-Clamps.
Resolved a broken inverter issue with Marcin by connecting the workshop grid to one of the remaining inverters. Reliability is definitely a significant design principle.
Discussed short-term implementation of forums/stack overflow-like software to help development process. 2 major factors for the success of such software identified as access and action relevance. Access made easier with invites, action relevance made easier by the right questions to prompt the right answers.
Tested the CEB Press with manual control. Teamed up with Marcin to fix some issues. Troubleshooted total non-movement by increasing up the hydraulic pressure from the powercube. Troubleshooted primary cylinder non-movement by loosening front support plate, but discovered that the real problem was a loose quick connector connection from the primary solenoid valve. Full manual control success. Back to solo work.
Tested the CEB Press with test code. Troubleshooted weird sensor-triggered movement by examining sensor analog values. So! The hall effect sensors switch and latch on and off, but electrical noise and in-circuit imperfections cause fluctuating output signals. To add to the problem, the magnetic field of the magnets interact with the sensitivity of the sensors as to cause multiple latching events when the sensor passes a single magnet!
How to make the sensors work properly?
1. Take multiple sample readings and average them into a moderated value; this will diminish the effect of short-lived extreme fluctated signals. Increasing the number of samples per averaged reading and decreasing the delay time after each sample helps, but will be limited by the processing speed of the electronics.
2. Use separate upper and lower trigger values for the microcontroller to determine when the sensor has passed a magnet. This ensures that fluctuations that pass a trigger value can be safely ignored to an extent by the microcontroller. 2 values that help determine the upper and lower trigger values are: minimum value in the high-latched sensor state and maximum value in the low-latched sensor state. If possible, have the lower triggger lower than the aforementioned minimum value and the higher trigger higher than the aforementioned maximum value.
3. Use post-latch delays. That can be as simple as putting a fixed delay after each latch-switch. This helps minimize the effect of sensor sensitivity to strong irregular magnetic fields but limits the operating speed of the sensor-controlled movement (ex. if the delay is 1 second, then the magnets need to be at least 1 second apart for the microcontroller to have enough time to pick up on the next latch point as it passes the second magnet). CORRECTION: Forget this, the sensor still latches and it's just the microcontroller that doesn't respond until after the delay. No good. We don't want the sensor to prematurely latch in the first place.
Made significant revisions to the testing code for extreme troubleshooting ease. CEB Press Test Code
Tested the new test code to success after implementing all of the make-sensors-work-properly changes. Started to revise the operation code for continuous brick pressing.
Contacted Star Simpson about inverter design topologies.
Scraping in a Dovetail - Detailed
File:Cartridgeblockspindles.pdf
2/10/2012
Using arduino IDE 64-bit on ubuntu 12.04 - Guide to Arduino make sure you open arduino as power user with sudo ./arduino when in the correct folder! Otherwise the serial port will be greyed out.
Hall Effect Sensor Module V2 x2 complete
- Research for choosing between rod, dovetail, or boxed way for linear guide (whoa there's V-ways and half-round ways too!) Gah I need a free download of the book "Foundations of Mechanical Accuracy"
Dovetail
You are not under the impression that the dovetail cutter needs to be the full width of the female dovetail are you?The cutter only needs to be as tall as the dovetail.Your remark about not having large dovetail cutters prompts my question.
Dovetails only need 1 gib
Actually the dovetail is the simpler mechanism. It is simpler to make and simpler to adjust in use. The one gib at 45 or 60 degrees takes up slack both sideways and vertically. One adjustment and you are done.
I was afraid of the results before I made my first dovetail, but it is a piece of cake if you plan it properly. The setup is the same for both male and female parts. As mentioned above, you do not use a cutter that is the full width of the female dovetail. You use a standard milling cutter to rough out the center, usually to a depth slightly greater than the actual dovetail. then you cut each side individually. The cutter only needs to be tall enough to cut the whole angle at one time.
I used a CAD drawing and placed even sized circles tangent to both the angled sides and the flat top/bottom surfaces to give me a way of measuring the width of the dovetail. You can read the distance between them off the drawing to three or four places and them use drills or ground, round stock of the same size to measure your work. Just mike between them on the female dovetail and across them on the male. Real quick way of checking your work on the mill. Of course, with a gib, you don't need extreme accuracy.
Box
Boxed way more rigid than dovetail
Boxed way conventionally steel with turcite for anti-friction contact surface OR cast iron with oiling OR metal with high-pressure oil (hydrostatic)
Boxed way conventionally ground then scraped