Losi Xcelorin Sensored ESC/Motor Combo for the MRC!

[shelljeep]

How hot are your esc's getting?
I just did a couple test runs on the carpet, really light stuff, just crawling, testing it's tipover point, etc.
Twice, after about 3-4 minutes, it would glitch. The throttle wouldn't respond and the steering would throw full lock one way and be locked until I turned off the power switch.
The esc temp'd at 138* and that's after taking a couple minutes to find my IR pen. Shot on the heatsink.
Running 3s and a 16T pinion.
Any idea what might be causing this? It's not a LV thing, the pack is still at 11.3V :sad:
Thanks.

 

[Nabil]

ive never ran a 3s on mine. that could be it. that thing must be crazy fast :shock:

also, the glitch could be caused by improper steering endpoints. mine will do it if the steering throws too far

 

[shelljeep]

I'll set my epa's and see if that helps.
What's the max temp for this esc? I just reread the manual and didn't see it listed.
So ya know, the motor stays cucumber cool so far. Hasn't really gotten over ambient.

 

[shadowrejects]

you think you could run it on a fxr??

 

[shelljeep]

Run another couple packs through it tonight. ESC got to 150*, motor got up to 100*. I may call Losi today to see what he max temp is and see if 150* is norma on 3sl.

I noticed it reverse itself a couple times when I was easing into/through a bind. My reciever doesn't have an antenna, I will switch it out tomorrow for on that does. Not sure if a weak signal could contribute to the heat issue, but I'm eliminating potential. I also had it do the "jump to a bind at full lock, no TH response" thing tonight.

Also got into the software, the signal was set on Legacy, not 2.4 Ghz. Kinda surprising, as I have been using the stock 2.4 radio. Fixed that.

Initial throtle response was set to medium, set it to high, much better. Wish I would have had more battery to play with. Will calibrate the esc tomorrow to make sure I'm getting all the go I can get.

Dragbrake was at 100%, dinked it down to 90% based of of you guys' recommendations. 100% still let me roll backwards though?

LVC was set for 2s, changed it to 3s.

Looking forward to more testing tomorrow. If somebody knows the max ESC temp, let me know.

 

[Del Monte]

Are you using the new firmware?

Having the LVC set for a 2s could definitely cause some problems.

I've only ran mine on a 3S a few times, but it ran great.

I'm wondering what is different about your system. With 100% drag brake my truck won't roll at all.

Run another couple packs through it tonight. ESC got to 150*, motor got up to 100*. I may call Losi today to see what he max temp is and see if 150* is norma on 3sl.

I noticed it reverse itself a couple times when I was easing into/through a bind. My reciever doesn't have an antenna, I will switch it out tomorrow for on that does. Not sure if a weak signal could contribute to the heat issue, but I'm eliminating potential. I also had it do the "jump to a bind at full lock, no TH response" thing tonight.

Also got into the software, the signal was set on Legacy, not 2.4 Ghz. Kinda surprising, as I have been using the stock 2.4 radio. Fixed that.

Initial throtle response was set to medium, set it to high, much better. Wish I would have had more battery to play with. Will calibrate the esc tomorrow to make sure I'm getting all the go I can get.

Dragbrake was at 100%, dinked it down to 90% based of of you guys' recommendations. 100% still let me roll backwards though?

LVC was set for 2s, changed it to 3s.

Looking forward to more testing tomorrow. If somebody knows the max ESC temp, let me know.

 

[shelljeep]

Spoke to a tech today. He couldn't tell me what the max temp was but he did confirm that the thermal protection would keep me from smoking it.
I'm going to change the rx tonight and rebind. The one that is on there has seen better days, missing an antenna.
Gonna check the connections, make sure everything is solid.
I will see about the firmware also.
I may change out the servo.
Thanks for the help.

 

[JOMJ87]

did you get it fixed? Also try re calibrating maybe? Set the throttle to medium?

Also is there a new firmware for the ESC? I am hoping they will unlock throttle deadband and the curves.

Cole

 

[shelljeep]

Was too tired to work on it last night.
I'm picking up the parts to reterminate the servo's receiver plug today. Looking at it closely last night, I can see where there was a possibility it could short. That could be the cause of the dead TH/locked servo.
Once I get that done, I'll have a better baseline to see what the esc temps are running at.
One other thing that might be contributing is the diffs. There is one small spot on each that has a slight bind as you roll the pinion by hand. It's not bad, and I couldn't see any damage but I'm going order new housings and diffs just to eliminate it.
I'm not meaning to sidetrack this thread, I just think that if I can resolve the heat issue then I should post up my results so people don't get the wrong idea about the xcelorin esc. Also letting newbs like myself know what can cause the esc to run hot.

 

[jkwrangler08]

This is an update to my posts about the steering servo going full throw when you turn on the Losi ESC..

Finally had some time to put my spare BEC in this morning.. Same thing

Just just for shits and giggles I ran the servo direct to the receiver.. Now remember, that this is the servo that I couldn't run without a BEC on my Holmes Hobbies Torquemaster ESC... Well I wouldn't have believed it if I didn't see if for myself, but no full throw of the steering AND IT WORKS just fine without the BEC.. "thumbsup"

Took it out on my little rock course in the back yard and bound it up as bad as I could and the nothing glitched and the steering worked just like before..

Another testament to how good this combo is "thumbsup"

 

[JOMJ87]

I almost thew mine accross the house last nite cause i am a IDIOT. I decided to try out the max throttle setting (was Medium) well i hooked it up and changed the settings. Now i just plugged it all back together and went to run it and it went full throttle, no reverse, just brakes on reverse throttle sortof and was acting crazy. after 2 hours i read thru set up once more and realized i never calibrated in the first place. It worked fine prior with my 3E but now i wouldnt. i calibrated and walla back to just fine. I am glad i didnt chuck it because i love this set up. Best out of everything i have ran.

AND yes the BEC on this thing is awesome glad to hear you got that worked out. Now i feel like i should go up in size since i know it will handle it.

Cole

 

[Snipervision]

I ordered my mini GC3 a couple days ago & hope to get it early next week. Ordering my Losi brushless Xcelorin package tonight. Can't wait to see how it works!"thumbsup"

 

[shelljeep]

Started making my repairs tonight. I changed one thing at a time to see what difference it made.

I'm pretty sure the servo plug was causing the glitch. I soldered a new plug, then I ran a full pack through it a few minutes ago in my rock garden and never had the full lock/no TH glitch happen.

I did lose signal going through a cave, and I had it reverse on me once when I was trying to go forward. Just swapped in a new LOSB0806 receiver, rebinded, recalibrated the esc. It seems more responsive. If the rx was a problem then it could have caused the lack of drag brake too. I think. I'll know more tomorrow when Isee how it does in the rocks.

I got a #46 bit today, which is about .0001 larger than 2mm. The pinion I drilled fits much more precisely on the shaft than the one I drilled, much less noise. Not sure why the pinions I got were drilled wrong but it was a $2 fix, no biggy. I'm running a 14T on it right now, zero cogging, and surprisingly good wheelspeed. I'm sure the 3s helps out in that dept.

The esc is still at 140* or so, shot a 138* tonight. After speaking with the tech, I'm not going to worry about it. It's just surprising to see the esc running hotter than the motor. Motor didn't even reach 100*, which is only 20* over ambient. Hell, the rx could have been contributing to that also.

I'm happy with it. Now can get back to finetuning the suspension. I'll post up tomorrow after I see how the esc temps, drag brake, and glitch do.
Becoming very pleased with this combo.8)

 

[Lorents]

If you want the temperatures to go down you could try to gear it down by reducing the pinion size. The higher voltage that 3S gives makes your motor turn a lot faster than a 2S pack. A 16t on 3S would be similar to a 24t on 2S if you just look at the motors kv.

 

[Del Monte]

Started making my repairs tonight. I changed one thing at a time to see what difference it made.

I'm pretty sure the servo plug was causing the glitch. I soldered a new plug, then I ran a full pack through it a few minutes ago in my rock garden and never had the full lock/no TH glitch happen.

I did lose signal going through a cave, and I had it reverse on me once when I was trying to go forward. Just swapped in a new LOSB0806 receiver, rebinded, recalibrated the esc. It seems more responsive. If the rx was a problem then it could have caused the lack of drag brake too. I think. I'll know more tomorrow when Isee how it does in the rocks.

I got a #46 bit today, which is about .0001 larger than 2mm. The pinion I drilled fits much more precisely on the shaft than the one I drilled, much less noise. Not sure why the pinions I got were drilled wrong but it was a $2 fix, no biggy. I'm running a 14T on it right now, zero cogging, and surprisingly good wheelspeed. I'm sure the 3s helps out in that dept.

The esc is still at 140* or so, shot a 138* tonight. After speaking with the tech, I'm not going to worry about it. It's just surprising to see the esc running hotter than the motor. Motor didn't even reach 100*, which is only 20* over ambient. Hell, the rx could have been contributing to that also.

I'm happy with it. Now can get back to finetuning the suspension. I'll post up tomorrow after I see how the esc temps, drag brake, and glitch do.
Becoming very pleased with this combo.8)

Good to hear "thumbsup"

Have you had a chance to try those pinions on any other motors? I have a full set here and they fit perfectly on our xcelorin motors.

I will glady send them to you if you would like to try them. You shouldn't have to drill out anything to make them work.

 

[3jeeps]

I have been running the xcelorin system for about a month now but recently. When I 1st put it in was running stock wheels with a little weight. I put mayhem comp 1.9's on with the fronts full of wt and the rears 1/2 full. This is in a gc3 chassis with the tranny fliped. My settings are 0% throttle limit, 80% rev. throttle, medium accel, and 100% drag brake. I have tried it on low accel. to make sure it wasn't just my throttle control but on steep decents it is very difficult to control, almost runs away. These decents are between 50-60 degrees. I notice DelMonte used 90%. Any thoughts? Otherwise I have no complaints great uphill throttle control. I crawl at the rox box in indy and if anyone has seen pictures or video I can climb the cement hill and the next bridge up, just can't get it down the right way. I forgot to add that I'm running a 17t pinion.

 

[JOMJ87]

Try the high throttle setting instead of medium. it seemed to give mine a tab bit more throttle control on the low end. And make sure your throttle setting on your controller is perfectly centered and not diving you a smal bit of forward throttle.

Cole

 

[dshelowjr]

I just got mine & all I can say is WOW . Super low end control & ridiculous wheel speed on A 3s!!!!! Thank you Losi"thumbsup""thumbsup"

 

[jkwrangler08]

Jake and Jay.. what drag brake setting are you guys running? The i/f only lets you set it in 10% increments.. 100% is pretty harsh and 90% rolls to easy..

any plans to put a "custom" setting in the there?

 

[nosfanatic2006]

Jake and Jay.. what drag brake setting are you guys running? The i/f only lets you set it in 10% increments.. 100% is pretty harsh and 90% rolls to easy..

any plans to put a "custom" setting in the there?

Agreed x2