That's good going there, the 'drive motors in a tube' concept I found works really well with Beetleweights, as it makes it easy to support the delicate end-cap part of the 20mm gearmotors we commonly use, which saw a beat-around joke wedgebot mostly made out of wood survive through an entire event and keep driving without an issue, where most of my previous beetles with the same motors, mounted hanging off their front faces or clamped around the gearbox would burn two or three per event.

I think the feather scale RS550's have different problems, but it might translate to at least somewhat better durability in that class
_________________
<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Yay! My shipment from the nice people at ozito arrived. I got 9 LS755 and 6 RS550s. Total cost was $100 including shipping. All look pretty much new. I think my current build can incorporate the larger motors/gearboxes without modification so I'm pretty chuffed.
The 755s come with 3 stage planetary's with a high/low speed toggle thing. What do most people do with these boxes? Slide it into high gear, pull off the toggle and leave it?

interested in the 775's if u wanna sell some

will take four if possible
_________________
Andrew Welch, Team Unconventional Robotics

Scratch that, the 755s are a little too big for my motor pods darn it. Rebuild time already


@Andrew: the markings on them say LS755. Is that the same as 775? Both them and the RS550s are 18v.

Nice work Scott... thats an awesome deal…no excuses ,for not having spares for next event he he …...low gear will not burn your motors out as quick ….but they are slower
_________________
Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015

basically if there the bigger motor versions then should be good, i wanna try and get warning back to the brawler from first wedge event, worst case ill keep warning how it is now nd just use them in a new design

lemme know if the motors r the bigger ones and if u dont want them we can work something out
_________________
Andrew Welch, Team Unconventional Robotics

@Andrew: I'd love to help out if I can, but I'm still trying to figure out if I want to use the big ones for my own bot at this stage I'll have to let you know.

Another question about the gearboxes, the 755 type gearbox also come with an automatic spindle locking mechanism on the output shaft. It seems like it might be a helpful thing... I imagine if your bot is being pushed hard by another machine, the mechanism would lock the wheels and save you having to try and push back...? However, I don't know:
-would it work very well tactically, perhaps it sacrifices static friction of the wheels for dynamic friction. Anti-lock braking systems come to mind here...
-whether the mechanism might jam up if its being torqued from both ends of the gearbox (I guess I can test that myself)?
-Is it simply a weak link in the whole system? The mechanism isnt huge, but looks robust. I have no idea what a big impact would do to it.
What do you folks think? To disable it shouldnt be hard but I'm curious as to ppls' thoughts.
cheers

It sounds like a great way to kill a motor or an ESC; if the wheel lock was ever engaged when you try to drive, something will get very hot very quickly.

You sure its not a hammer mechanism? As I dont see any reason to have that on a drill.

However if it works like you say it does nick is right. If you were to try and reverse the drill it would just lock up and be bad for your motor and ESC.

Could be useful but IMO KISS and just remove/disable it.

Steve
_________________
Steven Martin
Twisted Constructions
http://www.botbitz.com

It works to lock the output shaft, so you can use the whole drill like a screw driver (with no power), and also locks the chuck in position for keyless chucks so you can put force on it without the thing spinning. Basically, it only locks one-way: when torque is applied from the chuck end. I hope I didnt mis-name the thing I'm talking about...

The sound of something locking the wheels mid battle scares me….there is nothing more unspectacular than a wheel locking up mid fight….it happens in most fights but that is cause something has fried. Just test it heaps.

Hope it works though….you got plenty to choose from it looks like.
_________________
Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015

My Panasonics lock when not being driven. They have never caused a problem.
_________________
So even the rain that falls isn't actually going to fill our dams and our river systems

its some safety thing i believe thats required for new drills.
Its also handy to not overdrive screws into things.
_________________
Mechanical engineers build weapons, civil engineers build targets

Looking pretty tidy man, nice way to hide the motors/gearboxes and mount them at the same time