Cheap Ass 6x2 Pneumatic Belt Setup. 3D printed Pulley/ Vex Versa Pulley. Thingiverse link in post #534

ervinelin · September 22, 2018, 8:43am

I got 20km actually… But was very light on the trigger…

amazingdave · September 22, 2018, 9:17am

Yep I’m in the UK. I’ll post the pics of my adapters and how it all goes together on Monday.

amazingdave · September 22, 2018, 10:57am

I’d be happy with 20k out of a 10s2p!

ervinelin · September 22, 2018, 12:47pm

Again… Very gentle on the throttle and the last few km were just super slow…

Benjamin899 · September 22, 2018, 12:54pm

still, lets say you give more throttle and you drop down to 10km, that would still be good imo. If you ride pneumtic you want comfort or offroad capabilities. Shorter range is to be expected.

ervinelin · September 22, 2018, 12:56pm

Yup it’s expected… I wonder if I change the pinion from 15 to 20T will that help?

Benjamin899 · September 22, 2018, 1:07pm

did you print your gear drive yourself?

ervinelin · September 22, 2018, 1:48pm

Yes I did… See my build thread here.

Benjamin899 · September 22, 2018, 2:38pm

wrong link but i found it. the adapter for the hanger is for a more even spread of force and alignment? would you mind sharing your files

ervinelin · September 22, 2018, 2:54pm

Ah sorry. Edited link.

Adapter is to help align the wheel gear and to allow the wheel itself not to be bolted to the gear.

Will share once I have tested a little more…

Benjamin899 · September 22, 2018, 3:33pm

is there a calculator like we have for belts, but for gears. because i have no clue how to calculate the needed distance.

mishrasubhransu · September 23, 2018, 9:54pm

Since people don’t want to 3D print the pulley or don’t have access to a 3D printer. I made an adapter to use with vex robotics versa pulley. It’s a much smaller part to print and won’t take a lot of money. I have ordered a couple of vex robotics 60T pulley to show you guys how it fits. I can send them to whoever’s interested. Pay me shipping + what I paid for.

Files at https://drive.google.com/open?id=14AF8h_PFzBTdH6JRkKynJ70I3WzezC0N

versa_pulley_adapter versa_adapter_on_hub ! vex_versa_assembly vex_versa_assembly2

Benjamin899 · September 23, 2018, 10:08pm

duude you are the man. i am probably going to use a reshipping service to get vex pulleys to germany, before the mad max brexit happens. @mishrasubhransu where are you located?

mishrasubhransu · September 23, 2018, 10:44pm

I’ll DM you.

amazingdave · September 26, 2018, 3:02pm

Here’s my Delrin cnc router solution…,

mishrasubhransu · September 26, 2018, 3:06pm

Nice! I like that you are using all 6 screws. Maybe I’ll update my design.

Do you have a pic of your cnc router? How much did it cost?

amazingdave · September 26, 2018, 3:12pm

Thanks! The router belongs to the school I work for… it was around £4K and is not the best! It copes with Delrin well enough though.

Bataleon · September 27, 2018, 8:31am

Problem I am having is these wheels drink battery juice for breakfast!! I was expecting 20km range on my mini AT build, looks to me like I will only get about 15km.

I noticed a ~50% increase in energy consumption compared to my 83mm 75A Flywheels. Definitely worth it for the softer ride (the roads are really bad in my area).

What PSI are your wheels inflated to?

ervinelin · September 27, 2018, 10:12am

Wow 50% is bad!! But yes seems about right…

I have these at maximum PSI of 70.

Maxid · September 27, 2018, 12:47pm

Double the energy consumption for pneumatics has been the rule of thumb for like 2 years now.