Wraith, the El Cheapo spinner

[mrsam]

Yeah sorry I've changed it now, no spec sheet I'm just going on what Mario told me when I brought it from him.

[Ellis]

If he bought it from Pollin then it's very likely it's in fact 20,000 at no load. :P

[mrsam]

I'll stick a tacho on it when I test it properly, although something tells me the robot wouldn't like a 6000 rpm disc much :/

[harry hills]

I got a s900 with a angle grinder pinion on it somewhere. If you're after a slower motor that is.

[Flag Captured]

http://www.scorpionsystem.com/catalo...0/HK_7050_340/

There you go, motor problems solved.


I would try and have a look at the motor though, see how fast it ends up going. Maybe could get it all put together and then try it to see if it runs, if the motor struggles then replace it I suppose. The mechanism you've got seems great for the job, and if the motor still turns it, you can always limit the speed if needs be. I'm not so sure though without knowing the specifics... Brushless is always an option too I guess if needs be!

[mrsam]

Cheers Harry I'll give you a shout if needs be.

It might be fine but I'll give it a fair test first just to make sure, if it struggles at 6s with that big a reduction then I think an NTM is definitely on the cards.

[maddox10]

NTM50/60 270Kv with TZ85 worked fine in Prodigy Evo.

[mrsam]

Cheers Mario, what reduction would be best to run? i'll have a 3ish kg disc running at 6s

[mrsam]

Oh yeahhhhhhh! Drill press is finally here so tomorrow work can begin on Wraith, hoping to get the bulkheads cut out and the disc set up all mounted so look forward to regular updates.

[maddox10]

Prodigy Evo did well, albeit a slower than normal spinup time with a 1-1.5 ratio. About 4Krpm on a 380mm 3 kg disk.

[mrsam]

PROGRESS!!!! Of which there has been none, just disappointment and lots of it. The disc doesn't fit on the drill press so I can't drill the centre hole out, I didnt have any thin cutting discs for the teeth and didn't fancy trying to cut them with the 3mm ones, my circular saw has crapped out so the chassis cutting has to wait and I'm sure there's more, basically Wraith is still just a pile of parts.

[Niels - Team K.a.L.M.]

I hate it when that kind of crap happens

[Mega Masher]

Hey sam, when you say the disc doesn't fit in the clamp thing, then why not try clamping it aroun it like this


___________
|___________ clamp
______________
______________| disc
___________
|___________ clamp

Sorry for bad drawing. Hope you get what I mean

[mrsam]

Hi John what I meant is that the disc doesn't fit on the drill press at all, so there's no way to line up the drill and hole, got another solution lined up though hopefully but thanks for trying to help.

[maddox10]

It's called load out. Meaning the pillar of the drill and the chuck have a certain maximal distance they can bridge.