[FTC]: FTC Game Manual for 2015-2016?

[skatefriday]

Originally Posted by skatefriday

So say we want to supply 25mA to an arduino (a typical draw), do
we hook it up to one of the digital out ports? The documentation also
says Digital current limit: 220 ohm resistor.

Using I = V/R, I = 5/220 = .0227A, or roughly 23mA.

Am I reading this correctly then that we should not draw more
than 23mA out of any single digital port?

I hadn't noticed this before but you can pull 500mA out of
each usb port on the power distro module. That solves that
problem.

[MattRain]

Originally Posted by skatefriday

I've always hated the robots that are nothing but a 40 pound
slab of metal and a drivetrain.

And that's why you take a 40 pound slab of metal robot drivetrain, and place something useful/helpful/working on top. Makes for a good robot.

Our robots this past year were 50+ pounds.

[Sasha]

Originally Posted by skatefriday

So say we want to supply 25mA to an arduino (a typical draw), do we hook it up to one of the digital out ports? The documentation also says Digital current limit: 220 ohm resistor.

Using I = V/R, I = 5/220 = .0227A, or roughly 23mA.

Am I reading this correctly then that we should not draw more
than 23mA out of any single digital port?

As far as I understand, Arduino (or any other MC) is not allowed. The rules allow sensors and lights, but no other electronics. I do not believe that you can argue that Arduino is a sensor.

[skatefriday]

Originally Posted by Sasha

As far as I understand, Arduino (or any other MC) is not allowed. The rules allow sensors and lights, but no other electronics. I do not believe that you can argue that Arduino is a sensor.

Microcontrollers have been allowed for the last 4 years at least.

I'd find it hard to believe that they are outlawing them this year.

[Sasha]

Originally Posted by skatefriday

Microcontrollers have been allowed for the last 4 years at least.

I'd find it hard to believe that they are outlawing them this year.

I believe rule RE06 is quite explicit:

Additional Robot electronics are subject to the following constraints:

a. Light sources (including LEDs) are allowed; these may not be focused or directed in any way (for example: laser s and mirrors are not allowed).
b. Sensors
...
c. Video recording devices (GoPro or similar) are allowed providing they are used only for non-functional post match entertainment and the wireless capability is turned off

d. Other electronics are not allowed.

Arduino is certainly not a sensor (nor is it a light source or video recording device , so it is not allowed - at least, according to my reading of the rules. Once the official FTC forums open, we can ask for a confirmation there.

[skatefriday]

Originally Posted by Sasha

I believe rule RE06 is quite explicit:


Arduino is certainly not a sensor (nor is it a light source or video recording device , so it is not allowed - at least, according to my reading of the rules. Once the official FTC forums open, we can ask for a confirmation there.

Actually I disagree. An accelerometer is effectively a specialized
microcontroller. Are we going to assert that it's not a sensor?

The term "sensor" is exceedingly broad and given the way they
wrote the rules this year I think they mean it to be interpreted in
a broad manner.

I presume this will be one of the first questions asked when the official
forums open up.

[PHFTC]

I believe most sensors these days have some sort of micro processor on board, so an arduino/launchpad etc doesn't seem that out of the question.

I certainly hope that the uprocesser isn't intentionally banned - that would only seem like an effort to move kids who really want to do more to the FRC world...

I suppose the old superpro is a legacy sensor right?

[MattRain]

New motors are coming out on Andymarks website. NeveRest 20 and 60

NeveRest 20 (am-3102) ($25.00)
Physical Specs:
Overall Length: 5.18"
Maximum Diameter: 37mm (1.46 in)
Output Shaft size: 6mm (0.24 in) with 0.5mm deep flat
Weight: 0.762 Pounds
Mounting Holes: M3 tapped holes, qty. 6, on a 31mm bolt circle
Electrical Connection Geometry: 6-pin connector for motor power and encoder contact
Gear Material: Steel
Body Material: Steel with plastic encoder housing
Lubrication: Included with gearbox

Theoretical Performance Specs:
Gearbox Reduction: 20:1
Voltage: 12 volt DC
No Load Free Speed, at gearbox output shaft: 315 RPM
Gearbox Output Power: 14W
Stall Torque: 197 oz-in
Stall Current: 11.5A
Output pulse per revolution of Output Shaft (ppr): 560 Pulses

Performance Specs, mounted to AndyMark dyno: Coming Soon
Max Speed (under load of dyno):
No Load Current (under load of dyno):
Stall Current:
Stall Torque:
Max Output Power:
Time to Failure at Stall:
Motor Case Temperature at Failure:

NeveRest 40 (am-2964) Released last year ($25.00)
Physical Specs:
Overall Length: 133.5mm (5.26 in)
Maximum Diameter: 37mm (1.46 in)
Output Shaft size: 6mm (0.24 in) with 0.5mm deep flat
Weight: 0.75 pound
Mounting Holes: M3 tapped holes, qty. 6, on a 31mm bolt circle
Electrical Connection Geometry: 6-pin connector for motor power and encoder contact
Gear Material: Steel
Body Material: Steel with plastic encoder housing
Lubrication: Included with gearbox

Performance Specs:
Gearbox Reduction: 40:1
Voltage: 12 volt DC
No Load Free Speed, at gearbox output shaft: 160 rpm
No Load Free Speed, motor only: 6,600 rpm
Gearbox Output Power: 14W
Stall Torque: 350 oz-in
Stall Current: 11.5 amps
Force Needed to Break Gearbox: 1478 oz-in
Minimum torque needed to back drive: 12.8 oz-in
Output pulse per revolution of Output Shaft (ppr): 1120 (280 rises of Channel A)
Output pulse per revolution of encoder shaft (ppr): 28 (7 rises of Channel A)

Performance Specs, mounted to AndyMark dyno:
Max Speed (under load of dyno): 129 rpm
No Load Current (under load of dyno): 0.4 amps
Stall Current: 11.5 amps
Stall Torque: 396 oz-in
Max Output Power: 15 Watts
Time to Failure at Stall: 2 minutes, 54 seconds
Motor Case Temperature at Failure: 190 degrees F

NeveRest 60 (am-3103) ($25.00)
Physical Specs:
Overall Length: 133.5mm (5.26 in)
Maximum Diameter: 37mm (1.46 in)
Output Shaft size: 6mm (0.24 in) with 0.5mm deep flat
Weight: 0.776 pounds
Mounting Holes: M3 tapped holes, qty. 6, on a 31mm bolt circle
Electrical Connection Geometry: 6-pin connector for motor power and encoder contact
Gear Material: Steel
Body Material: Steel with plastic encoder housing
Lubrication: Included with gearbox

Theoretical Performance Specs:
Gearbox Reduction: 60:1
Voltage: 12 volt DC
No Load Free Speed, at gearbox output shaft: 105 RPM
Gearbox Output Power: 14W
Stall Torque: 593 oz-in
Stall Current: 11.5A
Output pulse per revolution of Output Shaft (ppr): 1680 Pulses

Performance Specs, mounted to AndyMark dyno: Coming Soon
Max Speed (under load of dyno):
No Load Current (under load of dyno):
Stall Current:
Stall Torque:
Max Output Power:
Time to Failure at Stall:
Motor Case Temperature at Failure:

NeveRest Motor (am-3104) ($15.00)
Specifications:
Physical Specs:
•Overall Length: 75mm (2.95 in)
•Maximum Diameter: 38mm (1.49 in)
•Weight: 0.550 Pounds
•Mounting Holes: 3x M2-0.4 x 22mm deep
•Electrical Connection Geometry: 6-pin connector for motor power and encoder contact
•Gear Material: Steel
•Body Material: Steel with plastic encoder housing
Theoretical Performance Specs:
•Voltage: 12 volt DC
•No Load Free Speed: 6600 RPM
•Power: 14W
•Stall Torque: 8.75 oz-in
•Stall Current: 11.5 A
•Output pulse per revolution of Output Shaft (ppr): 28

(SOURCE: www.andymark.com)

[CougarRobot]

Originally Posted by wgardner

I like this gem from 5.3.1: "One example of a guiding principle is that if a Team would not want an opponent to use a particular design feature against them, it is likely that it will not be allowed in competition."

Let's see how they're going to enforce that one.

I really dislike when opponents use design features against us that score points. Particularly if they score more points than we score.

[skatefriday]

Originally Posted by CougarRobot

I really dislike when opponents use design features against us that score points. Particularly if they score more points than we score.

Right but don't forget that you want your opponents to score
points, just one less point than you do. Those ranking points
matter.

[MattRain]

Andymark has released all of the new motors. It looks like a nice line of motors. NeveRest Line.

One of the motors in the line comes without a gearbox. I wonder if they will release other gearbox that you can purchase to repair motors/gearboxes.

It was nice at Worlds for them to replace the NeveRest 40's if you broke them at any part of the season.