Big wheels on a heavyweight

[jamesb]

Big wheels on a heavyweight

thank you Woody,
I was going to offer the same advice.
It is also worth recalibrating if changing any part of the robot control system, such as reciever, transmitter, or motors. I certainly does no harm, and I have been advised by Robot Power that correcting the calibration will cure 90% of customers problems.

[craig_colliass]

Big wheels on a heavyweight

Tried all kinds of things

Re-set the Sidewinder, and changed the settings on the Spectrum that is the ELE and AIL Travel adjustment settings (For the RH stick) tried it at 100%, 115%, 125% and 150% no difference in output to the motor, when I went below the 100% mark to 90% the power was reduced but only in one direction?? I don€™t know why that should happen unless it is to do with the one stick operation; this is set up on the Sidewinder!!
Still mysteries like this are what make this game such fun. Like I say I can live with the power output as it stands. If anyone has any other ideas let me know or alternatively have a play when we meet at Swindon.

Just a thought when I get Saint Mk 2 going I was thinking of running the Bosch motors at 36 volts will this be ok? Or should I try to reduce the power to the motors via the Spectrum ELE and AIL Travel adjustment settings? That is if I can get the same voltage backwards and forwards.

Thanks Craig

[beast]

Big wheels on a heavyweight

Mr Stu i dont need to read books you set it up for me

ONE big problem is i do have to stop in beast to fire (same setup on roboteq you dont)there is a 9v batter in line as well as 24v

Little john said the sidewinder is slower not me as i dont drive it compared to the roboteq,

not convinced yet as awaiting the new sidewinder befor i mess with the spectrum ( but could do a test swap back to 40 meg but No thanx

James please ans your email if you can see this thread you can see email im sure yes thats a dig!

(Message edited by jct on January 15, 200

[robotwars]

Big wheels on a heavyweight

over in ireland i converted back to 24v from 36v after i had to revert to Stus sidewinder ( thanks again )

I did find the same problem, that it wouldnt fire my 2 fire burkets while driving, i too had to stop before i could fire.

To the pneumatic experts.... i noticed a slight drop in flipper performance too..... maybe because it was sub 0 temperatures.... but woul firing a burket on 36v open it quicker hence get better flow??? I was just wondering.

woody or mario im sure you know the answer?

Im reverting back to the roboteQ for Ripper EVo and back to 36v as the sidewinder is going in something else.

John

[john]

Big wheels on a heavyweight

whats it going in jonno?

my new toy?

[robotwars]

Big wheels on a heavyweight

something new, thats all im saying for now...

No your toy needs something a bit bigger

John

[john]

Big wheels on a heavyweight

hehe thats what i thought :P

[woody]

Big wheels on a heavyweight

I wouldnt have thought the Burkert was opening slower ...rather as you suggest the low air temperature... the bottle pressure drops down to 500 psi @ zero degrees celsius and 250 psi @ minus 10 degrees celsius etc.

[robotwars]

Big wheels on a heavyweight

ok, just wondered / hoped !!


John

[stu]

Big wheels on a heavyweight

Oh it was easily Zero degress ain Ireland... so 500psi - no wonder the flippers were pants unless they go the heaters/hair dryers out.

LOL @ John - well next time let me at ur Current and Slew rate and specktrum settings and we can sort it correctly this time, same to jonno when he uses the sidewinder in his new toy.

But hurry up and get building my new big big big big toy for Swindon

Mr Stu

[john]

Big wheels on a heavyweight

wait til u c my new toy stu

its the new beast aint it jonno

[craig_colliass]

Big wheels on a heavyweight

I had an email from Chris from robot power this helps I think.
My note to Robot power.

Hi I have a Sidewinder in my heavy weight robot
it runs two 750w Bosch motors with 2 hawker SLA batteries.
At the input to the controller I read 24.1v and at the output to a
motor I read 23.1v with the motors freewheeling at full speed is this
normal? I have been discussing this on the FRA forum in the UK.
http://www.fightingrobots.co.uk/forum.htmhttp://www.fightingrobots.co.uk/forum.htm the thread is Big wheels on
a heavyweight I have re-set the unit and adjusted the trim on the
radio can you advice?


The reply
Hi Craig,
This is normal. The Sidewinder does not go to 100% PWM because of its
current limiting scheme. The voltage drop is not burned up per se but
is simply not supplied to the motors. Your drop seems a little larger
than nominal but not too far off.
Try calibrating the radio with the trims cantered and then move the trim
slightly while measuring the voltage. You may be able to get a little
more voltage out of the controller by expanding the range of the signal
(ATV setting) after calibration - not much but some.

Regards,

Chris Baron
Robot Power

P.S. If I could ever get approved for forum membership I could monitor
and reply to these questions directly but Ive applied a couple of times
and never heard back so I dont follow the forum

[craig_colliass]

Big wheels on a heavyweight

Hi Ive made the first wheel out of 15mm UHMDPE 500mm Dia I hope to take it to the Swindon show, I would like anyone€™s opinion on the material, and I think it may still be a little stiff. Has anyone used 15mm for wheels before?

[maddox]

Big wheels on a heavyweight

I did, the wheels from the Dutch Enderbot. And the series of wheels for Touch As Nails.

Stiffness isnt anything special according to me.

[craig_colliass]

Big wheels on a heavyweight

Thanks Mario