Team MedBots

[maddox10]

Re: Team MedBots

Gears are cut to have the right play when the holes are drilled perfectly concerning the pitch diameter.

But if you want to do the drilling of holes for gears artisan style, a mod 1 pair of gears can benefit from a piece of sigaret paper in between the gears.


Also, to make the calculation for you, I need to know the module.

Or you do as I, and open your smartphone, download the Dennis Martens Gear Spacing Calculator (not in the google play store, it's being spread by Email), and fill in the 3 numbers. Module, Gear 1 and Gear 2


On the relais. A closed relais can take +/-15 amps per 1mm² of contact surface. But it's breaking contact that makes the difference. The lighter the moving contact part is, the faster it can move, breaking the arc fast, but the instant an arc is formed, you're welding or spark eroding the surface.

It's how the 4QD's NCC 70's work with a 40 amp relais. The fet closes the power to the relais. The relais switches, and the mosfet pours in the power again. That means even a cheap relais can switch a far heavier load than what it could do on its own.

[Max]

Re: Team MedBots

I can't find te gear spacing app, is it for android?
The gears are MOD 1.5

[daliad100]

Re: Team MedBots

Who needs app's when you have calculator

Pitch circle diameter = MOD * No of teeth

therefore

Spacing = MOD/2 (N1 + N2) where N1 and N2 are the number of teeth on each gear

[maddox10]

Re: Team MedBots

I can't find te gear spacing app, is it for android?
The gears are MOD 1.5

(not in the google play store, it's being spread by Email), and fill in the 3 numbers. Module, Gear 1 and Gear 2

In short.
33.75 mm centre/centre of the holes.

[Max]

Could I uses a pair of these 1kg welding co2 bottles instead of a 2kg fire extinguisher in a heavyweight?
http://www.toolsandpowertools.co.uk/...dioxide-1000g/
I would replace the valves with some hydraulic ball valves.

[Max]

Would a pair of these:
http://www.technobotsonline.com/flan...ails-20mm.html
To connect the wheels of my heavyweight to the 20mm output shaft of the gearbox?
The wheels are 8" diameter.
Also still want to know about if I can use welding bottles instead of a fire extinguisher.

[Max]

Good news, I finally got my fw flipper working! I had to connect it to a fire extinguisher as my co2 bottle is empty. It worked really well and chucked a brick pretty high even on only 5 bar. Also the hinge or the lid didn't bend this time!
Hopefully I will get it all fully sorted before Guildford as that is the weekend after my GCSEs

[Max]

Hi,
Does anyone know the rough overall size and weight of the burkert 5404 valves?
Thanks,
Max

[maddox10]

http://www.burkert.com/COM/search.ph...earchText=5404

[maddox10]

Could I uses a pair of these 1kg welding co2 bottles instead of a 2kg fire extinguisher in a heavyweight?
http://www.toolsandpowertools.co.uk/...dioxide-1000g/
I would replace the valves with some hydraulic ball valves.

No. 2 reasons.
Ball valves don't have burst disks.
Main bottles need to be commercialy available.

[Max]

Thanks Mario, I realised safety posting that the dimensions were probably on the data sheet! But I can't find the weight anywhere, does anyone have a rough idea (like more or less that 1/2 kg)?
Thanks

[maddox10]

675 grams according to our kitchen scales.

[Max]

Does anyone know if the Bosch 750s and Bosch 400s are the same size? Or at least have the same spaced mounting bolts on the front?

[maddox10]

The diameter of the can and the spacing of the mounting bolts are the same. Axle is also 12mm, but can have a M12 thread.

Length is unclear , but it won't be longer.

In short, it's a 1 on 1 replacement.

[Max]

Hi,
I was wondering what people's thoughts were on having drive wheels at the front of a heavyweight? I've heard that at the back causes oversteer particularly as most my weight isn't over the back, in the middle means you can't drive off wedges so that just leaves the front!