Help with XL2 log data???

[Kirkinsb]

Looks like a heck of a nice set-up you have! I still have to run mine at 10/second to see what I come up with. But perhaps with a 4wd that has big tires...it may pull that much current. If temps are reasonable....you are probably ok to proceed.

The only thing you may think about doing is getting a waterproof receiver box...like a traxxas stampede receiver box to protect from dirt and water splashes. Good looking rig! Run it hard with the 10/second and post what you get. I may have time tomorrow to get some data on mine at 10/s or whatever the highest is.

[magicald]

Originally Posted by Kirkinsb

Looks like a heck of a nice set-up you have! I still have to run mine at 10/second to see what I come up with. But perhaps with a 4wd that has big tires...it may pull that much current. If temps are reasonable....you are probably ok to proceed.

The only thing you may think about doing is getting a waterproof receiver box...like a traxxas stampede receiver box to protect from dirt and water splashes. Good looking rig! Run it hard with the 10/second and post what you get. I may have time tomorrow to get some data on mine at 10/s or whatever the highest is.

Thanks, I've spent a lot of time on this thing.

I do need a receiver box.

I just hope my new battery fixes the cogging...I think it will, it reminds me of when i tried the stock nimh pack with my old Rc18 with a 8000kv motor, which worked great on lipos

[Kirkinsb]

Ok, got a VERY good Hard run with lots of full throttle all the way through the RPM range....best of all, I used the 10 samplings per second setting on my Castle Mamba XL2 with 2028 motor in my baja 5t. I probably ran it harder than usual because I really wanted to see what was the MAX current recorded.....

And it was just about exactly as I suspected. I usual us the 2 samplings per second data setting and pull about 220amps... Now with the setting on 10 samplings per second i got a maximum of 240.6 amps. And i would most likely attribute the extra 20 amps to driving ultra aggressive this run. I was really throwing my 5t around!!!!

I feel my original readings at 2 samplings per second were fairly accurate...seems they were.... I will next run my Revo also with a XL2 that I will put at 10 samplings per second...and see if it is still close to the 2 sampling per second data I have always used.

[magicald]

Originally Posted by Kirkinsb

Ok, got a VERY good Hard run with lots of full throttle all the way through the RPM range....best of all, I used the 10 samplings per second setting on my Castle Mamba XL2 with 2028 motor in my baja 5t. I probably ran it harder than usual because I really wanted to see what was the MAX current recorded.....

And it was just about exactly as I suspected. I usual us the 2 samplings per second data setting and pull about 220amps... Now with the setting on 10 samplings per second i got a maximum of 240.6 amps. And i would most likely attribute the extra 20 amps to driving ultra aggressive this run. I was really throwing my 5t around!!!!

I feel my original readings at 2 samplings per second were fairly accurate...seems they were.... I will next run my Revo also with a XL2 that I will put at 10 samplings per second...and see if it is still close to the 2 sampling per second data I have always used.

Thanks for the update...I agree, numbers are not that much different.

I really want to see your Revo data and how it turns out. I'm still waiting on my new Battery, I also got some 17mm hubs to run truggy tires on my muggy as well. I want to see hard numbers as to how much larger/heavier tires really makes on the amp draw with the 1717.

[Kirkinsb]

Just ran the Brushless Revo with MambaXL2 and 1518 motor. Ran perfect as always...drove the crap out of it as always. I usually collect data at 2 writings per second.. this time I raised it to 10 readings per second and just as I had suspected the data was VERY similar to what I get at 2 per second. My MAX current was 109, Watts was 2128. this is basically the same data...which supports my suspision that I am NOT missing huge chunks of data by using the 2/second writing setting.

Keep in mind before you all blast me...this are my findings...you may get something completely different.

But this all started with a fellow RCer wondering if his 240amp current reading was accurate on his Muggy.....I said it seemed way high compared to my 110amp on my brushless revo. Another member suggested I was missing data not using the highest reading possible....I did not truly feel that I was missing huge chunks. And when I raised it to 10/second....the readings were very close.

Which brings me back to the original topic.....240amps seem really high to me for a Muggy. I ran the crap out of my 12lb revo and could only pull 110ish!!!! Draw your own conclusions....

but I hope this helps out some. Is good data according the Castle's Mamba XL2 data logger....both at 2/second and 10/second.

[magicald]

Nice to see that at least your data didn't seem to change much with sampling rate.

I know you pulling a lot less amps, but we are not comparing apples to apples. I know they almost weigh the same (I need to weigh my muggy, but its at least 12-13 lbs rtr)...Again, out of the electric components, my lipos are the only thing used that I don't have the whole history of. They always worked well, but again that was all of 5 runs and over 6 months ago is when I decided to buy an IRC 4mm chassis and completely rebuild it.

I've read a lot about testing brushless motors though it seems like a difficult thing to do without special equipment. Correct me if I'm wrong, but if my 1717 is bad, would the motor run flawlessly without load and running with wheels off the ground? If I had a couple more male 8mm bullets I would throw my 1521 in...new battery should be here 2/1.

Also, what firmware are you running on your XL2? I'm running the most recent, which was on it from CC. Just wondering if previous versions were better for cogging with the 1717? I know with my MMM, 1.21 had no cogging, but newer version did??

[Kirkinsb]

Originally Posted by magicald

Nice to see that at least your data didn't seem to change much with sampling rate.

I know you pulling a lot less amps, but we are not comparing apples to apples. I know they almost weigh the same (I need to weigh my muggy, but its at least 12-13 lbs rtr)...Again, out of the electric components, my lipos are the only thing used that I don't have the whole history of. They always worked well, but again that was all of 5 runs and over 6 months ago is when I decided to buy an IRC 4mm chassis and completely rebuild it.

I've read a lot about testing brushless motors though it seems like a difficult thing to do without special equipment. Correct me if I'm wrong, but if my 1717 is bad, would the motor run flawlessly without load and running with wheels off the ground? If I had a couple more male 8mm bullets I would throw my 1521 in...new battery should be here 2/1.

Also, what firmware are you running on your XL2? I'm running the most recent, which was on it from CC. Just wondering if previous versions were better for cogging with the 1717? I know with my MMM, 1.21 had no cogging, but newer version did??

I don't really know of a way to know if a motor is OK, other than running it and seeing how it performs and checking temps. There are guys on this forum that know a whole lot more than I do about motors and escs....all i know is double the current that I have been seeing really caught me by surprise.

You may be totally fine pulling that current....I know my firmware must be stock...I have never updated it...since both mine were running good.

Get them Lipos installed and fire that big dog up...I am interested to see what kind of data you get.

I have not run my my Revo for a while...I forgot how outragous that thing is! Lots of fun! Keep us posted.

I think I was more trying to show some people that my data was fairly accurate even on the 2/sec setting.

[magicald]

Wow, just for giggles I downgraded my firmware to 1.24 (oldest available) and cogging is much, much less barely noticeable much like what it was with my old MMM!!! Its funny because the logo on the castle link now says "Mamba Monster" instead of "XL" but logging is on there. I quickly looked at the very short log of just tooling around my garage and the max amps was 58, but my ripple was 10%!!! However, my batteries were on the cooler side maybe 60 degrees and partially discharged...not quiet storage level, but definitely not fresh off the charger.

Why the hell does the newest firmware cog more?? I didn't try any of the other beta firmwares.

What's funny is this was the same deal with the 1717 and my MMM... old 1.21 worked best??

Will do more testing, but with that ripple my batteries do look like they need to be replaced. Otherwise, huge wheels and all I think it will be ready for a "real" run when I get my batteries...might start off with truggy wheels and same gearing, then stock muggy wheels, then the big Cen wheels to see how much of a difference big wheels and tires makes.

[magicald]

Well...got my new batteries and nothing but let downs and disappointment!!!

My muggy cogs worse with new TP G6 65C batteries!! About the same on the newest firmware. I was only able to drive a little in my garage...it was pouring rain tonight outside...

Then worst of all, I was trying other firmware when a dialog box of death popped up saying the "update didn't finish, disconnect and reconnect esc" Well now my XL2 is bricked!!!!!!!! The lights no longer flash on the Castle Link....WTFFFFFFFFFFFFFFFF!!!

I'm about ready to give up on my E-Muggy!!

[Kirkinsb]

Originally Posted by magicald

Well...got my new batteries and nothing but let downs and disappointment!!!

My muggy cogs worse with new TP G6 65C batteries!! About the same on the newest firmware. I was only able to drive a little in my garage...it was pouring rain tonight outside...

Then worst of all, I was trying other firmware when a dialog box of death popped up saying the "update didn't finish, disconnect and reconnect esc" Well now my XL2 is bricked!!!!!!!! The lights no longer flash on the Castle Link....WTFFFFFFFFFFFFFFFF!!!

I'm about ready to give up on my E-Muggy!!

Awww man, that is terrible news. Sorry to hear that crappy news. Dang, that sounds like it is fried.... Perhaps a call to Castle Support tomorrow may help...Otherwise, you will probably have to send it in...and the wait can be a long time....That is why I bought a second XL2 so if one goes....I have another... Castle will take care of ya...but it may take some time to get you a new one back in the mail...

Freakin sux though. I have been there with the Ver 1 & 2. Keep us posted.

[brian015]

Originally Posted by magicald

Yeah, forgot to include that I'm using huge wheels and tires - 55 series Cen snipers...this is probably really screwing up my gearing. They really are not much heavier than stock muggy.

I'll have to do a run with my stock wheels.

Part of your problem may be that you are geared for almost 70mph, if my calculations are correct:

Differential Ratio: 4.090909090909091
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 17
Total Voltage: 22.20
Motor KV: 1580
Tire Diameter (inches): 7.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.82 : 1
Total Ratio: 11.5508 : 1
Tire Circumference (inches): 23.56 inches (598.47 mm)
Rollout: 2.04:1
Total Motor Speed: 35076 RPM
Vehicle Speed: 67.76 mph (108.84 km/h)
Effective KV Value: 1580
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

[magicald]

yeah my overall problem with start up cogging may be my gearing; however, all testing has stopped now that my ESC is Bricked after trying to update the firmware...have to call CC tech today, but I assume it will be going back with months of waiting for a replacement...I don't have $$ to just buy a new one

This is the data im getting with my 1717 savage XL, no cogging and motor and esc temp covered in plastic was around 60f.
Great motor, my only complaint is that my run time compared to the stock savage with 1515 is halfed(ore more) :) Def a power hungry beast

New record, 164 amp

Except the kind of high ripple, is the graph ok?


[YOUTUBE]w28tGETsEpA[/YOUTUBE]

i had an big 6s pack taped on the top of the reciver box, so the truck was a bit front and top heavy.