The ratchet only catches in one direction. Since our catapult only needs to be driven forward, (the motor never spins backwards), the ratchet is always slipping when the motor is retracting the catapult. The ratchet prevents the system’s rotation in the backwards motion, because we never want the catapult spinning backwards. Hope this helps.
Just wondering how you drilled out the 72 tooth gear for the ratchet on the cata because when we tried to drill it out, the gear started melting and we couldn't get through the metal.
This bot doesn’t use 72t gears for the catapult. On our worlds bot, we drilled out the 72t gears by drilling out little by little and squirting the gear with water to prevent melting.
it was really bad and we wanted a fresh start Edit: our original flywheel bot was bad. (Competed at Mall of America sig) We developed the 3600 cart method while cadding our catapult, as fun side project.
love you video Vex hex question about catapults in general? The motor would pull the cata down and spin the ratchet untill it’s into position them to shoot it would you spin the cata father down untill the slip gear slipped or would you somehow release the ratchet or what’s a way to release the catapult?
The gear turns until it reaches the slip part and then the catapult launches. The ratchet is on the gear powered by the motor, essentially just to lessen the load of the catapult on the motor. The only way for the catapult to release is to use a slip gear, because the catapult needs to be able to spin on its own in order to shoot.
@@journeyhancock ohh okay thank you, the 12Tooth gear would go on the shaft that the motor is powering and then it would stop in place that’s very smart thank you I’m going to try this!
I guess that's one way not to group your motors lol. Having somehow qualified to worlds, I decided to build 6m drive, and as if the stars aligned, I saw this drivetrain explanation video on TH-cam xD
I'm just curious, how do you guys disable the ratchet when the cata fires forward? Also does hitting the limit switch fire the cata or stop it from going back?
I'm super late but I was wondering how did you guys mount the cata bar to the 84 tooth did gear? Did you just drill your own hole. You guys have like no gear showing and I couldn't find a default hole for that. Thanks y'all are amazing!
How'd you guys get so little friction on the drivetrain, I understand that it's about aligning bearings and what not, but are there any specific tricks when building to do that?
We encountered heavy defense at our competitions, leading to chips in the front cata plate and the right side panel in the unsupported sections. The front intake ramps are meant to push discs out of the way when we do rollers and there are discs jammed against the wall. They also help us wedge under people’s drivetrains to increase our defensive ability.
Was wondering how do you guys have such a smooth movement when driving, our previous builds with 4 motor and now 6 motor usually rock back and forth when we let go of the stick to have the robot come to a standstill. Is that something you guys had edited in your code or was it more of a hardware solution.
We use a piston boost to shoot during autonomous, due to the geometry of the catapult our grouping is bad so we can only shoot 1 at a time when using the piston boost
@@Lilniko_13 we are using delrin. the most common ramp material is polycarbonate, it can be bought pretty cheaply on robosource. plexiglass is illegal, it says so in the game manual.
The build quality on this bot is amazing! Thanks for all the cool content, you guys are such an inspiration.
Congrats on 1k subs. Well deserved. Hope to see you guys at states 🤞
what team are you?
@@606X 47510W
HAPPY BIRTHDAY BEN!
❤
W battery placement
I LOVE VEX HEX!!!
Third. (Early access hits different)
Ong, God bless vex hex!!!
@@rainbowofdoom719 Got to turn the unlisted 606X videos into the new SCA chat now that forum is gone.
@@9MotorGang this is so true, secure platform
@@rainbowofdoom719 It's not like Ben would leak the entire thing to the internet on Wednesday.
SCA
Quick question, how do you disengage the screw on the rachet in order for the catapult to slip with the slip gear? Great build btw!!
The ratchet only catches in one direction. Since our catapult only needs to be driven forward, (the motor never spins backwards), the ratchet is always slipping when the motor is retracting the catapult.
The ratchet prevents the system’s rotation in the backwards motion, because we never want the catapult spinning backwards.
Hope this helps.
It's dosent need to be disengaged since it isn't on the slip gear, it's on a different gear
why weren't you guys using your odometry pods?
quick question, how do you guys disengage the cylinder boost during driver control? I didn't quite understand a disconnected port, thank you!
I love vex hex! I love Ben
Just wondering how you drilled out the 72 tooth gear for the ratchet on the cata because when we tried to drill it out, the gear started melting and we couldn't get through the metal.
This bot doesn’t use 72t gears for the catapult. On our worlds bot, we drilled out the 72t gears by drilling out little by little and squirting the gear with water to prevent melting.
I have a question, what is the gear ratio and rpm for your guys drivestrain
48:72 400 rpm
what type of polycarb do you use? I heard del-rin?
delrin
The cata going against that air pressure is actually really smart
just curious what happened to the flywheel
it was really bad and we wanted a fresh start
Edit: our original flywheel bot was bad. (Competed at Mall of America sig)
We developed the 3600 cart method while cadding our catapult, as fun side project.
We had tuning issues on our first flywheel bot. The 3600 rpm flywheel is pretty good but I liked the cata better so we just switched to cata
love you video Vex hex question about catapults in general? The motor would pull the cata down and spin the ratchet untill it’s into position them to shoot it would you spin the cata father down untill the slip gear slipped or would you somehow release the ratchet or what’s a way to release the catapult?
The gear turns until it reaches the slip part and then the catapult launches. The ratchet is on the gear powered by the motor, essentially just to lessen the load of the catapult on the motor. The only way for the catapult to release is to use a slip gear, because the catapult needs to be able to spin on its own in order to shoot.
@@journeyhancock ohh okay thank you, is a ratchet still a good idea to use on a catapult, or will it complicate it more that it’s worth?
@@braydensmith6069 It's really simple, the ratchet is easy to build and is relatively easy to install. For sure worth the effort
@@slogoat-6183 Feel free, this is why we create our videos.We want to share ideas out to people so they can implement it themselves
@@journeyhancock ohh okay thank you, the 12Tooth gear would go on the shaft that the motor is powering and then it would stop in place that’s very smart thank you I’m going to try this!
Why did you make it 6:06 long? 😭
forgor 💀
I guess that's one way not to group your motors lol. Having somehow qualified to worlds, I decided to build 6m drive, and as if the stars aligned, I saw this drivetrain explanation video on TH-cam xD
bro already won states huh
@@727robotics Australian Nationals was over the weekend bro
@@79419_QuantumComputer damn nice
@@727robotics the 3 hour timezone difference in jetlag is already killing me, idk how I'm gonna survive going to Texas lmao
@@79419_QuantumComputer lmao fr. at least you don’t have to worry about at least making it to texas lol
One or two air tanks? Do the auton pistons use a lot of air? Thanks
Only one tank, the auton pistons don't use up air at all, they only need the pressure and we could toggle that on and off without losing air
Where did you guys buy the poly carbonate from?
Hi what gears did you guys use
I'm just curious, how do you guys disable the ratchet when the cata fires forward? Also does hitting the limit switch fire the cata or stop it from going back?
where did you get the black delrin
amazon, but it's super overpriced. I would recommend mcmaster carr or grainger
We currently rebuilding to use piston boosting so nice timing. Can you shoot 2 disks at once from mid?
Yes, but you need good grouping
@@yimingzhu Any tips on how to get good grouping?
@@3MoneyMultiplier3 it’s a bit different for every bot but try adjusting the geometry of the catapult and the hardstop
@@yimingzhu We have tried adjusting the geometry multiple times with no success. How would the hardstop effect the grouping?
@@3MoneyMultiplier3 By adjusting the hardstop the launch angle will change
I'm super late but I was wondering how did you guys mount the cata bar to the 84 tooth did gear? Did you just drill your own hole. You guys have like no gear showing and I couldn't find a default hole for that. Thanks y'all are amazing!
yes just bolted the catapult to random holes on the 84t gear.
How'd you guys get so little friction on the drivetrain, I understand that it's about aligning bearings and what not, but are there any specific tricks when building to do that?
use a leveler and a magnifying glass to make sure all bearing flats and spacing are level and consistent
Ty
Can you use split arcade with all wheels geared togehter
yep, that's what we use
What happened to the right sideplate? and what is the purpose of the wedges in the front? just to help push people?
We encountered heavy defense at our competitions, leading to chips in the front cata plate and the right side panel in the unsupported sections.
The front intake ramps are meant to push discs out of the way when we do rollers and there are discs jammed against the wall. They also help us wedge under people’s drivetrains to increase our defensive ability.
Its super late but how do you brace your cata tower?
making sure it's as built into the structure of the chassis as possible
I LOVE BEN!!!!!! VEX HEX BEN HEX VEX BEN HEX VEX BEN HEX!!!!
great bot, thanks for all your videos. where can i find a boxing c channel?
it's made when spacers are shoved into the open face (the C of the channel). it is 0.875" thick of spacers
@@606X thank you
Was wondering how do you guys have such a smooth movement when driving, our previous builds with 4 motor and now 6 motor usually rock back and forth when we let go of the stick to have the robot come to a standstill. Is that something you guys had edited in your code or was it more of a hardware solution.
We've had the same problem, I think it's something with the stop setting on the motors, but I'm not sure
We have our drive motors on coast. When there is no joystick input, the motors are not active at all. Driver practice also helps smoother movement
We also had that problem and we solved it by lowering the center of mass for the robot
Does keeping the standoffs on the cata wider make a difference? When I tried it with mine it just made the spread too much
we just placed them there without much thought, it worked for us. Haven't really tried to experiment with anything else.
we love vex hex
Found it
ben when im gettting your sig on the plates you gave me
lmaooo someday...
can you link the bands you used for the cata
www.vexrobotics.com/275-1262.html
Was there any benefit to removing the traction wheels and using 3 omnis on each side
Driver preference. We are tryna be tokyo drift out here
This is an awesome bot! Was wondering what brand or type of rubber bands you were using. They seem pretty strong.
we use latex tubing, found on vex.com
I have a question, why do you use two penumatics in the catapult?
pneumatic boosting, it helps shoot farther in autonomous
@@606X Thank you very much for getting me out of the doubt, beautiful night!
Are those single or double acting pistobs
double
@@606X oh, i thought they were single
Can y'all make to from center of field?
We use a piston boost to shoot during autonomous, due to the geometry of the catapult our grouping is bad so we can only shoot 1 at a time when using the piston boost
can you use plexiglass on the robot for actual competition
no
@@606X what are you guys urging for ramp then, since no plexiglass, but my teacher said we could use it
@@Lilniko_13 we are using delrin. the most common ramp material is polycarbonate, it can be bought pretty cheaply on robosource. plexiglass is illegal, it says so in the game manual.
How much teeth were cut of
for the piston boosting, how do you detach it so it stops boosting after auton?
the solenoid switches the air away from the active port so the cylinders are unpowered
@@606Xim dumb, that makes sense thanks. Also, do you have any tips for building a great intake?
@@pokehim_ yeah, make sure that the intake wheels are a bit further out from the ramp, and also a lower initial ramp angle helps too
I have a question, how many teeth are your slipgears?
It's been a while since we cut them, but it's somewhere in between 9-12 teeth per section. We had to change it quite a few times
@@606X how long is arm?
Forgor💀 somewhere around 10-15 holes
How much rpm are the motors on your drivetrain?
600 rpm (blue)
What's your cata gear ratio?
1:7 100 rpm
Did you use 200rpm (green) motors or 600rpm (blue) motors in the drivetrain? Amazing robot design btw.
600 rpm. Thanks!
Yay
proof ben goes outside
I went outside but I didn't touch grass 😭
you sure this isn't a green screen
What rpm are your wheels spinning at?
400 rpm
@@606X that means you have 600rpm motors as your drivetrain?
@@lucaswhiteaker yes
WHHHHHHHHHHHYYYYYYYYYYYYYYYYYYYYYYYYYYYY THE INERTIAL SENSOR STICKING OUT THE BOTTOM OF THE BOT AHHHHHHHHHHH
clear 🤏
I think your driver told me you are doing a redesign
Yes we are
@@606X cool
The sauce is actually crazy
Ya know the even better sauce tho😁
Ben too hans 😮💨🥴
op
Second
first
fourth
500th
played these guys today and ive never been happier to lose. #vexhex4L