Team Shakesc : Build Diary

[shakesc]

So tidied up the wiring enough to allow




Interesting how it gets the motors to chirp initially. Some ESC's also want to see some stick movement before going through this procedure




A bit of test driving and ramping, seems to have enough power.
I have changed the start to be as soft as possible by programming the ESC. It looks a little twitchy but no more than the speed 900's

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

Looks promising, well done

[shakesc]

Well, Spur II has been on a diet

It was going well


It lost 4 Gibson motors and a 4mm mild steel baseplate

Whilst my back was turned though it sneaked out and ate 2 DeWut's
To finish the job off there will be a dessert of 3.2mm hardox base and chain driven wheels



I guess Christmas will show if it also swallows a brushless motor for a bit of fun

[daveimi]

I'm really sorry if this is a stupid question, but is it going to be 4wd?

[shakesc]

Not obvious from the photo but it will be 4 wheel drive.
Wheel mounted directly on the DeWut with the other wheel chain driven from it

[daveimi]

The Dewuts look like a nice bit of kit

[shakesc]

Yep. I can almost guarantee that every fight a Gimson motor would give up. If it gave up early enough then another would follow
Only way for the motors to survive was to reduce throttle travel. As this is partly (mainly) a rambot then wasnt really what you wanted. Not expecting to kill the DeWuts too often

[Ellis]

Hey Chris, are you able to get more footage of testing the Alien motors? I can't gather much from the ones you put up before and with the champs around the corner it's crunch time. Do they start up together, or does one get going ahead of the other? What's torque like? Is it possible to drive in a straight line or is the control too hit and miss?

Really need hands-on reports!

Cheers.

[shakesc]

Well the timing is handy. Its been fully stripped down as I've changed the internal packaging considerably to accommodate the linear actuator in place of the DeWut for lifting. Today is the first day its been back together and the motors have been run up
I'll get some videos

Did you buy any, every time I check they are saying out of stock?

[Flag Captured]

The motors themselves seem to be out of stock on the website, but they're doing something here: http://alienpowersystem.com/shop/ser...nsors-service/

I'm not sure if this replaces the existing lot of sensored outrunners, or if it's an aside to... but they seem to be in stock if that helps!

[Ellis]

I bought one a while ago, and an ESC, only just now getting to the point of using them in a bot. The lack of stock is indeed worrying.

As in-depth as you can make the videos would be brilliant, in terms of what you are actually doing on the transmitter and how it reacts. Otherwise impossible to tell what is controlled and what is accidental!

[shakesc]

Feel the need to message them on this. Motor + this service makes it a lot more expensive

[shakesc]

So ran some testing
Unfortunately 1 motor is running sensored and the other will only run unsensored

All driving tests were done with the motors unsensored

Acceleration


Also youtube http://youtu.be/dr06_fNNSz8
Probably got to around 3/4 stick before impacting the door

Its not lacking in power and all tests I've done I've been impressed by the power these motors can give.

Control tests


Generally controllable but the garage floor isn't very smooth so its not a great surface to do test drives. It gives some demo of forward / reverse
Stick movement isnt too large

Run up test without sensor on both motors

Minimum stick movement to get motor rotation to full stick

Run up test with sensor on left hand motor

Minimum stick movement to get motor rotation to full stick

and youtube
http://youtu.be/SfZonJnW8dM

The big difference is the low speed. With the sensor the low speed start up is slower and more controlled

[Flag Captured]

It does, and the smallest is 50mm, however I don't know if the 30-something quid it costs includes the motor itself...

Failing that, it does list the exact sensor used within the motors - I certainly wouldn't try it myself but I guess there's the possibility of adding those kind of sensors to any other outrunner, if it comes to it?

[Eventorizon]

Feel the need to message them on this. Motor + this service makes it a lot more expensive

I would guess they have spotted a market and they are doing this to increase profit. Can't blame them really, its a very hard and specialised thing to do, especially if they are milling into a motor. If they mess up its going to cost them a lot.