R1Pro Cogging?

[gtxracer]

I just got all my stuff together for my CRT build. Here's the specs:

CRTx1
9XL with RCM heatsink
R1Pro with two 35V 1200uf caps
CCBEC
Neu 5s 5000mah pack
JR 9000T
Losi Sport synthesized Rx and Tx (for now)

I had a slight mishap when I first plugged in the setup for a test run. The little spring on the deans plug bent towards the other side (polarity) and sparks flew. It fused the deans together but since I had the BEC wired in through it's own separate deans connectors I unplugged everything right away. I'm pretty sure the battery is okay. The R1 and Rx are fine, no damage. There is some cogging though. I was thinking it was my Tx batts since they aren't fresh and could use replacement. It caused my setup to eat a spur gear, 46T Kyosho. I only have 2 spares so I would rather not have this happen again. Any tips? Is this normal with low batts or is my BEC causing this? Any help would be greatly appreciated.

[Arct1k]

I would check your mesh and the motor connections - I've never know cogging to strip a spur.

Jeff is your best bet for knowledge on the R1Pro

[jhautz]

So the deans plug shorted across the battery? Am I understanding that right?

I had an old BK system that had something wrong with it, It cogged so bad it literally ripped a round chunk out of the plastic spur gear. so it can happen.

I cant ever remember getting cogging from my R1s except for the time I had a capacitor wire break. If you are getting any cogging then there is something not right. Make sure the capacitor didn't get damaged in the short. Double check that all of your connections are still good. Not sure exactly how it shorted but if enough juice went through it to fuse the deans plug together you certainly could have melted a marginal solder joint somewhere.

I doubt that low radio batteries would cause cogging, but a main battery pack that isn't putting out enough current certainly would cause it. How long was the pack shorted? Completely fusing the deans together seems pretty extreme. Are you sure the battery is OK?

[gtxracer]

I took a closer look. When that little strip connected the polarities it heated the plastic and caused it to melt around the connectors. They were fused together, but not touching. It was just the plastic that melted.

Shorted for a split second. I saw the spark, immediately pulled them apart, then realized the plastics had melted and hardened. There were two deans connectors. One on the battery and R1Pro. The other was an inline "plug in" style on the BEC. I wanted it like that so I could take off the bec quickly if I wanted to instead of directly soldering it to the + and - of the ESC.

It didn't fuse the + and - together on the battery. It just fused those first two deans connectors together. Does this make any sense? I can take a picture if I need to. Thanks for the help.

[jhautz]

Check all of the connections and even resolder them all just to make sure you have good joints. Also do a good inspection of the Capacitors to make sure they werent damaged.

What settings are you using on the R1Pro? Set the start power to low and the timing all the way down to start with. Do you have the Hotwire for the R1Pro? If not, you should get it. It allows you to adjust some stuff that the standard button programing will not.

[bdebde]

I would replace all the connectors involved in the "mishap". A leading cause of cogging can be poor connections.

[jhautz]

Originally Posted by bdebde

I would replace all the connectors involved in the "mishap". A leading cause of cogging can be poor connections.

+1

honestly I just assumed that the connectors would have already been replaced.

[gtxracer]

I bought it used. He was using it with a 2S setup so it had the small cap on it. Replaced it with the big ones from Mike's store. Didn't buy Hotwire, but it looks like I should get it. I was still reading the instructions but I thought it was plug-n-play. I'm going to the gym here shortly and afterwards I'll pickup some AA batts on the way home to replace the ones I was using before.

I will check the connections. I'll also snap some pics and post them here. I already swapped out the burnt connectors and direct soldered the BEC to the R1Pro. It's just a temp setup so everything is zip tied and not in it's permanent home with the exception of the Rx.

[pb4ugo]

Did you get the polarity right on the larger cap?

[gtxracer]

I'm pretty sure since I have leads coming off them (red/black). I will double check though.