Wiki

[technik3k]

Reserved for discussion of VEX Sprockets, chain, and specialized chain links

[technik3k]

Reserved for discussion of linear sliders and related hardware

[technik3k]

Reserved for discussion of elastics, rubber banding techniques, and links to appropriate topics

#64 Rubber Bands

I have direct experience with all types of alliance and the platinum crepe bands.
Get the platinum crepe. They are leagues better and almost never break. Only reason I would not recommend them is if s very precise amount of banding is needed or you want weak bands, and they are nearly twice as strong as alliance.

DR4B Tutorial by 333A

Rubber Banding Resources:

See the rest of @therealcedz UTRBs post...

Most teams use this sort of rubber band system on their lift (4 bar, 6 bar, 8 bar, etc.): <a href="http://i.imgur.com/EOkMWQx.png" rel="nofollow noopener">[image]</a> This system is great due to complexity vs. effectiveness. Just by putting a couple of pieces of metal (in this case, standoffs and screws) and rubber bands, the stress on the motors is greatly reduced. However, some of you m…

Non Latex Rubber Bands

Hello! Our team was recently at a competition, and another team that we were alliance parters with told us that the rubber bands we used were not allowed since they were latex based. They said that we could only use non latex based rubber bands. Is this true? I haven’t found anything in the rules stating that they are not legal. They are size #64

[technik3k]

Reserved for discussion of VRC legal plastics

Should Lexan usage be banned?

This is a spin-off thread from this 3D pringing thread which resulted in a fairly lengthy conversation on why Lexan should be deemed as a non-usable resource from @TaranMayer. I have simply moved it over to a new thread to prevent the old one from being heavily derailed.

[technik3k]

Reserved for discussion of string, winches and any related topics

[technik3k]

Reserved for discussion of ratchets

[technik3k]

Reserved for discussion of worm gears, u-joints, and other odd mechanical components

[technik3k]

Reserved for discussion of additional mechanical component 1

[technik3k]

Reserved for discussion of additional mechanical component 2

[technik3k]

Reserved for discussion of locking mechanisms
https://www.youtube.com/watch?time_continue=256&v=68oPA9c9W28&feature=emb_title

[technik3k]

Reserved for discussion of motor sharing through ratchets

315G Ratchets Explained (6 motor drive, 2 motors for everything else)

60 tooth ratchet

Using 1 motor for 2 different functions

[technik3k]

Reserved for discussion of transmissions

[technik3k]

Reserved for discussion of motor sharing through “differentials”

Differential transmission - Mobile Goal to Drivetrain (DMD)
Differential transmission - power takeoff from the drivetrain motors
Planetary CVT (Continuously Variable Transmission) Help!

9551A Transmission Update

Vex Transmission Recap/Explanation/Tips

[technik3k]

Reserved for additional advanced building technique 1

[technik3k]

Reserved for additional advanced building technique 2

[technik3k]

Reserved for additional advanced building technique 3

[technik3k]

Reserved for discussion of Pneumatic components 1

[technik3k]

Reserved for discussion of lubrication of mechanical components

Best Type of Grease for Vex Plastic Gears?

What do you find is the best type of grease for vex gears. Is it graphite powder, white lithium grease, WD - 40 etc.

Anyone try Moly Lube over Lithium Grease?

Anyone try Liqui Moly (Molybdenum Disulfide) grease before with Vex parts? http://www.liqui-moly.com/liquimoly/produktdb.nsf/id/en_1080.html?OpenDocument&land=GB&voilalang=e&voiladb=web.nsf We generally use White Lithium grease as it is cheap and readily available. I am wondering if the properties of liquid moly grease to stay nice over time in dusty conditions. They are purported as good but is it much better than white lithium greases? Vex is low RPM, even keel temperatures of not very …

[technik3k]

Reserved for discussion of mechanical maintenance of V5 smart motors

How to Change a V5 Smart Motor Gear Cartridge - VEX Robotics Knowledge Base

DO NOT use industrial lubricants like WD-40 or white lithium grease on internal plastic gears inside V5 motors or cartridges.

You may use light synthetic oil or synthetic grease like SW-92SA that is used for fine/plastic mechanical internals of cameras, printers, keyboards, dvd players, etc…

Broken Motor Inserts

V5 motor Cap and Threaded Insert replacement parts are sold separately

May need to be moved into V5 Motor electric/programming entry:

How does the decreased current affect the robot when using more than 8 motors

vexos 1.0.9 uses a different algorithm than versions 1.0.8 and earlier. 8 or less motors are still capped at 2.5A. 9 or more are capped as follow, remember this is current at the motor not current from the battery, 9 2.39A 10 2.29A 11 2.20A 12 2.12A 13 2.04A 14 1.98A 15 1.91A 16 1.85A 17 1.80A 18 1.74A 19 1.69A 20 1.65A However, those values are only valid if user code has not set current limit lower on one or more motors. If that has happened we take the user specified lower motor curren…

[technik3k]

Reserved for V5 components overview

3-wire:

How to Configure VEX 3-Wire Devices - VEXcode V5 Text - VEX Robotics...

Defining three wire devices in text

The issue is that the build system will not guarantee the order in which instances are created across different source files. The instance of Brain is defined I’m assuming somewhere else such as robot-config.cpp. That means it may not have been created, and therefore the Brain.ThreeWirePort also not created, when you try to access it in your main.cpp source file. The solution is to either move bumper LiftBumper = bumper(Brain.ThreeWirePort.A); into the same file (and placed after) as the Br…

Specific 3-wire port numbers for dual wire sensors:

VEXcode V5 Text Version 1.0 Release

Pretty sure all programming solutions either enforce this or have documentation explaining it. For example, PROS has Encoders must be plugged into the ADI such that the top wire is in an odd numbered port (1, 3, 5, 7 or ‘A’, ‘C’, ‘E’, or ‘G’), and then the bottom wire must be in the next highest port number.

Possible problem due to order of initialization of 3-wire port accessor instances:

Memory Permission Error

Temporary workaround for 8 legacy 3-wire port limit:
Connect multiple sensors to a single port to overcome the limit of 8 legacy ports

Legacy, non competition legal components:
Using Flashlight in VCS