Search found 56 matches

by Lowtech
Fri Mar 26, 2021 9:52 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

Just wondering what the crushing mechanism is going to be, is it a lead screw that's connected to the crushing jaw on a bearing? Looks really nice so far. The claw is mounted to a shaft that runs between the gap formed by the two metal plates. The shaft is supported by two bearings on either side.
by Lowtech
Wed Mar 17, 2021 9:15 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

It's looking very good... What method of crushing are you using? Curious because I've been using large servos, but they weigh an awful lot, are you using hydraulics of some sort or other? I'm using a Pololu Micro Metal Gear motor with an extra gearbox screwed on. I can't remember the model, but you...
by Lowtech
Wed Mar 17, 2021 9:11 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

I feel that you are pushing that motor to its limits. Even with all the gearing you are likely getting inefficiency and such throughout the gear and its about maxed out. For a crusher weapon you might want to consider a system that is specifically built for this application- a linear actuators such...
by Lowtech
Wed Mar 10, 2021 5:44 pm
Forum: Events
Topic: AWS 62 - Summer/Autumn 2021
Replies: 22
Views: 2725

Re: AWS 62 - Summer/Autumn 2021

I wouldn't like to think that people who don't have the expertise to build a robot from scratch were completely ruled out of AWS. Maybe a more inclusive rule might be that you have to have made your own body and your own weapon (spikes included). I guess we have to set some standards for AWS, but we...
by Lowtech
Tue Mar 09, 2021 5:34 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

It seems that when you are measuring "force" here, you are really meaning torque, which must be defined by pressure AND distance from the centre of rotation. eg foot pounds, inch ounces, Kg cm, etc. Perhaps the force you are quoted are at 1cm? Then if the crusher point is 2cm from it's ce...
by Lowtech
Mon Mar 08, 2021 8:16 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

EddieJ wrote: Mon Mar 08, 2021 8:06 pm Have you got some electronic scales it can bite down on? Perhaps measure what force you are getting now, to see if you are far off the 3.5kg?
Im not sure what amps the Rx will output.
Mmm, that's an idea. I don't have a small enough scale, but my neighbours might!
by Lowtech
Mon Mar 08, 2021 5:52 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

Whats the internals looking like? It might be you want a mechanical solution rather than an electronic one. If the servo is designed for 5V, and you are running it like that. Instead maybe you could add some gearing? Hi Eddie, The claw is powered by a pololu geared motor with an extra reduction sta...
by Lowtech
Sun Mar 07, 2021 8:02 pm
Forum: Antweights
Topic: My first antweight thread
Replies: 4
Views: 618

Re: My first antweight thread

Looks solid!
by Lowtech
Sun Mar 07, 2021 2:22 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

EddieJ wrote: Sun Mar 07, 2021 10:57 am AA batteries are 1.5V. You are using a servo to power it? Which will be on the 5V of the BEC? I think you will get a better result
I went out and did it today. You can see the result through the link.
by Lowtech
Sun Mar 07, 2021 2:21 pm
Forum: Antweights
Topic: Crusher, why not?
Replies: 32
Views: 3782

Re: Crusher, why not?

https://www.youtube.com/watch?v=JaRCb4FXPXA&ab_channel=Combatechist I modified a servo ESC to power the claw using the BEC. This was the result, much better! Still, I was hoping for more. Can someone with a better knowledge of electronics than me please explain what my limiting factors are? I'm...