RCCrawler Forums

luke-o · 02-20-2011, 07:15 PM

.my set up is a fxr, cc bec (set at 6v), 2s lipos (20c and 30c), futaba 3pl and fhss receiver, spektrum 6030 servo (278 oz torque), and 55t motor. i have tried new gearing, new motor, new servo and new esc, new tx/rx, the only thing i havent treid is a new bec because the light comes on green and the output reads at 5.99 volts when checked with a volt meter. my problem is that my steering will stall when it is on anything that isnt smooth or if im not moving, and my motor stalls if it gets into any bind at all. so my question is what could be the problem?

Charlie-III · 02-20-2011, 07:45 PM

Is the BEC feeding the servo, or is it connected to the RX?
What connectors for the battery & motor? If they are Tamiya (or similar junk) they may be getting hot which kills power transfer.

luke-o · 02-20-2011, 08:08 PM

its conneceted to the reciever and deans connectors on both battery and motor

RcBro · 02-20-2011, 08:25 PM

Brand of Lipos? The cold is a huge issue today. I have very high end electronics and cold weather will kill the performance of any rig. Keeping your lipos warm is a must.

luke-o · 02-20-2011, 08:41 PM

yeah i know that cold didnt help today. but i had lipos in my pockets all morning, but this has been happening for a little while and i thought it was just my servo and my gearing but i got a new servo and i know my gearing is good now and its still doing it.

RcBro · 02-20-2011, 10:25 PM

What brand is the servo? Does it do it in a particular direction left or right?

I recently witnessed a crawler that had a dead short in its servo. If he turned to far to the left it would stall out the servo and his motor.

Just throwing out ideas. CC BEC may be your best bet though. Try removing the BEC and use the bec on your esc for a pack and see if the problem goes away.

JRock · 02-20-2011, 10:31 PM

Don't get me wrong here but did you pull the red wire from esc to the receiver? Just throwing it out there to try to help you troubleshoot

flizz · 02-20-2011, 11:18 PM

Sounds like power issue with the bec or RX does the ESC have a cap on it?

luke-o · 02-21-2011, 12:54 AM

Quote:

Originally Posted by RcBro

What brand is the servo? Does it do it in a particular direction left or right?

I recently witnessed a crawler that had a dead short in its servo. If he turned to far to the left it would stall out the servo and his motor.

Just throwing out ideas. CC BEC may be your best bet though. Try removing the BEC and use the bec on your esc for a pack and see if the problem goes away.

it does it both ways and it did it with a airtronics servo and i had a brand new spektrum servo in it today that i bought yesterday. and it has acted the same with both

Quote:

Originally Posted by JRock

Don't get me wrong here but did you pull the red wire from esc to the receiver? Just throwing it out there to try to help you troubleshoot

yeah i did that

Quote:

Originally Posted by flizz

Sounds like power issue with the bec or RX does the ESC have a cap on it?

yeah it does and i switched to an esc that i know is good and it keeps doing it.

NOMERCY!! · 02-21-2011, 08:37 AM

It sounds similar to what happens when you hit the LiPo cut-off in the ESC. Double check that it is set right, for 2S.

luke-o · 02-21-2011, 06:47 PM

i have used the hotwire to check it on both the esc's i tried and i know my batteries were charged. could maybe the bec be a turn into a dud when i make it do some work, cause its getting 6v when nothing is being used but maybe when my servo or esc start drawing power it cant handle it?

02-20-2011, 07:15 PM	#1
luke-o Pebble Pounder Join Date: Mar 2009 Location: stayin fresh in the northwest Posts: 129	what could be the problem?? .my set up is a fxr, cc bec (set at 6v), 2s lipos (20c and 30c), futaba 3pl and fhss receiver, spektrum 6030 servo (278 oz torque), and 55t motor. i have tried new gearing, new motor, new servo and new esc, new tx/rx, the only thing i havent treid is a new bec because the light comes on green and the output reads at 5.99 volts when checked with a volt meter. my problem is that my steering will stall when it is on anything that isnt smooth or if im not moving, and my motor stalls if it gets into any bind at all. so my question is what could be the problem?

02-20-2011, 07:45 PM	#2
Charlie-III I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA Posts: 8,314	Is the BEC feeding the servo, or is it connected to the RX? What connectors for the battery & motor? If they are Tamiya (or similar junk) they may be getting hot which kills power transfer.

02-20-2011, 08:08 PM	#3
luke-o Pebble Pounder Join Date: Mar 2009 Location: stayin fresh in the northwest Posts: 129	its conneceted to the reciever and deans connectors on both battery and motor

02-20-2011, 08:25 PM	#4
RcBro RcBros Hobbies Join Date: Nov 2005 Location: Oregon Posts: 4,646	Brand of Lipos? The cold is a huge issue today. I have very high end electronics and cold weather will kill the performance of any rig. Keeping your lipos warm is a must.

02-20-2011, 08:41 PM	#5
luke-o Pebble Pounder Join Date: Mar 2009 Location: stayin fresh in the northwest Posts: 129	yeah i know that cold didnt help today. but i had lipos in my pockets all morning, but this has been happening for a little while and i thought it was just my servo and my gearing but i got a new servo and i know my gearing is good now and its still doing it.

02-20-2011, 10:25 PM	#6
RcBro RcBros Hobbies Join Date: Nov 2005 Location: Oregon Posts: 4,646	What brand is the servo? Does it do it in a particular direction left or right? I recently witnessed a crawler that had a dead short in its servo. If he turned to far to the left it would stall out the servo and his motor. Just throwing out ideas. CC BEC may be your best bet though. Try removing the BEC and use the bec on your esc for a pack and see if the problem goes away.

02-20-2011, 10:31 PM	#7
JRock RCC Addict Join Date: Nov 2008 Location: J-Braaaapin It Through Gate 10 Posts: 1,897	Don't get me wrong here but did you pull the red wire from esc to the receiver? Just throwing it out there to try to help you troubleshoot

02-20-2011, 11:18 PM	#8
flizz Pebble Pounder Join Date: May 2009 Location: farmington crawler capitol Posts: 149	Sounds like power issue with the bec or RX does the ESC have a cap on it?

02-21-2011, 08:37 AM	#10
NOMERCY!! Rock Stacker Join Date: Nov 2008 Location: Streetsboro Posts: 77	It sounds similar to what happens when you hit the LiPo cut-off in the ESC. Double check that it is set right, for 2S.

02-21-2011, 06:47 PM	#11
luke-o Pebble Pounder Join Date: Mar 2009 Location: stayin fresh in the northwest Posts: 129	i have used the hotwire to check it on both the esc's i tried and i know my batteries were charged. could maybe the bec be a turn into a dud when i make it do some work, cause its getting 6v when nothing is being used but maybe when my servo or esc start drawing power it cant handle it?

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