Author Topic: twisted sick robotics (Read 38651 times)

Sage · « **Reply #40 on:** January 22, 2009, 07:50:59 PM »

im not so sure about that weapon. doesn't seem damaging to me.

zipdragon64 · « **Reply #41 on:** January 22, 2009, 07:54:52 PM »

well i could get some pics of the stuff i've been testing it on if you want plus i want to make a video where you guys vote on what i destroy so it anyone has suggestions on what they want to see get wrecked post em here

Somebody · « **Reply #42 on:** January 23, 2009, 05:36:21 AM »

How bout you show it grinding through a piece of wood.

WhamettNuht · « **Reply #43 on:** January 23, 2009, 11:39:10 AM »

How about it busting up an old computer mouse?

zipdragon64 · « **Reply #44 on:** January 23, 2009, 02:49:24 PM »

that i can do got a few of them =P

zipdragon64 · « **Reply #45 on:** January 23, 2009, 09:21:53 PM »

well heres just what some of you wanted and for those who did speak up when they had the chance they missed out

http://www.youtube.com/watch?v=uAcgLIzbuO0&feature=channel_page

the one video won't process i've been waiting for over an hour its a youtube problem, but as soon as it works ill plug it in and you can check it out, but for now you can just enjoy the above

-fixed it-

zipdragon64 · « **Reply #46 on:** February 01, 2009, 09:22:13 AM »

well here is my current progress on Szalor my hor spinner should be done with it in the next weeks or so

H@zm47 · « **Reply #47 on:** February 01, 2009, 06:37:29 PM »

Looks frightening. Nice job

zipdragon64 · « **Reply #48 on:** February 05, 2009, 07:21:16 PM »

thanks and the frame is pretty much done just a few more little tweeks then i\'ll be ready to mount the motors and finish it up

MikeNCR · « **Reply #49 on:** February 05, 2009, 07:28:36 PM »

Looks good. Love the colors, too.

Condor33 · « **Reply #50 on:** February 05, 2009, 09:28:10 PM »

I don't know, but I would be a bit cautious about using a belt in that. VSs could have ability to throw them off of their sprockets (is that the right word?)

zipdragon64 · « **Reply #51 on:** February 06, 2009, 06:04:14 AM »

(pulleys) but close enough

theres not much i can do about it, i've made the groves on the pulleys as deep as i can so hopefuly i won't have this problem plus i have like 6 spare belts, after all there just ebay o-rings

zipdragon64 · « **Reply #52 on:** February 14, 2009, 07:39:18 PM »

ok i have finsihed the weapon assembly on szalor here is a video of the test spin-up

Naryar · « **Reply #53 on:** February 14, 2009, 07:44:54 PM »

The noise is scary.

How many RPMs?

zipdragon64 · « **Reply #54 on:** February 14, 2009, 07:56:35 PM »

well in a perfect word the motor should be spinning at 14,060 on a 7.4v battery and with a little less then a 1.5:1 ratio it should be pulling around 9400 rpm-ish with a 5 1/2" blade not bad i guess

Sage · « **Reply #55 on:** February 14, 2009, 11:48:02 PM »

nice.

zipdragon64 · « **Reply #56 on:** February 16, 2009, 09:08:20 PM »

http://www.youtube.com/watch?v=ulALpQnmchg&feature=channel_page

Szalor is done! except for some driving issues witch im going to fix later oh and its a little over weight thats another thing i need to fix but other then that its done

Somebody · « **Reply #57 on:** February 17, 2009, 06:24:56 AM »

Is it alot or a little over, because if it was a little, just go crazy with a drill.

Madiaba · « **Reply #58 on:** February 17, 2009, 08:19:00 AM »

That's nice, Zip. Well designed and built, IMHO.

A few suggestions to check out, since I cannot see it myself (and you may already know):
- I would check your driven assembly's (hub and blade) static and dynamic balances. Considering it's turning around 10k rpm, the vertical depth of your hub, and the length of your blade, it wouldn't take allot to get imbalances. The scews on your hub are not the same height; I don't know what's under the hub.
-From working with dragster engines and blowers that turn at that speed, imbalance will sop up power quickly and load the support structures(esp. bearings) that strive to hold it in check. ACAMS can also verify what I say here. Some electric motor shops can balance it for you. BTW: For a reference, the more 'whiney' it sounds the better it's balanced, but the more it sounds like a 'buzzer' the worse. From listening to it on your vid, both the buzzer noise and the variation in rpm point toward rotational imbalance.

I quickly googled and found this illustration. The static balance would relate more toward your blade, the dynamic toward your hub/pulley:
Static Imbalance:

Occurs when there is a heavy or light spot in the tire that prevents the tire from rolling evenly and causing the tire and wheel to undergo an up-and-down motion.

Dynamic Imbalance:
Occurs when there is unequal weight on one or both sides of the tire/wheel assembly's lateral centerline, thus creating a side-to-side wobble or wheel shimmy.

The static imbalance creates a hop or vertical vibration. The dynamic imbalance creates a side-to-side or wobbling vibration. Most assemblies have both types of imbalance, and require dynamic balancing (commonly referred to as spin balancing) to create even weight distribution.

Hope this helps. Just trying to share useful info...Spyguy will nail me again(hehe).

Naryar · « **Reply #59 on:** February 17, 2009, 08:29:35 AM »

^^ static inbalance: exactly what happens when a VS loses a weapon head.