[NSRCA-discussion] Futaba BLS173SV centering problem

Mon Feb 13 17:12:14 AKST 2017

Thanks ??? guys:
I ask about centering and it costs me $300 replace with adequate servos!
LOL
Seriously, appreciate the advice.
Dan

On Mon, Feb 13, 2017 at 6:35 PM, David Harmon via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> I had a serious problem with aluminum arms on certain JR servos…..the bag
> works very well.
>
> Just hold a piece over the spline and press down on the arm….fixed.
>
>
>
> *David Harmon*
>
> *Sperry, OK*
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> *On Behalf Of *John Gayer via NSRCA-discussion
> *Sent:* Monday, February 13, 2017 1:57 PM
> *To:* General pattern discussion <nsrca-discussion at lists.nsrca.org>
> *Subject:* Re: [NSRCA-discussion] Futaba BLS173SV centering problem
>
>
>
> Take a small piece of a plastic bag and sandwich it between the splines
> and the output arm. That will reduce/eliminate the slop. Some plastic arms
> don't fit right either.
>
> On 2/13/2017 12:43 PM, Earl Haury via NSRCA-discussion wrote:
>
> Dan
>
> ï¿½
>
> I find that 0.13 dead band works well. Gear wear isnï¿½t usually a problem
> with the 173, the Futaba aluminum arms donï¿½t fit the splines tightly
> though ï¿½ you might check this if using these arms. Lots of folks use the
> 173 on bipe ailerons (which tend to be smaller). Some time ago I measured
> servo current draw on each surface and ailerons were by far the highest ï¿½
> as Peter notes, big surface. At 7.5v they might be OK, I use the BLS171
> which has 60 or so more oz-in torque. Iï¿½ve also found that servos slow a
> fair bit whenever current draw exceeds 60% of stall current ï¿½ another
> reason to err on the high side.
>
> ï¿½
>
> Earl
>
> ï¿½
>
> *From:* Daniel Underkofler via NSRCA-discussion
>
> *Sent:* Monday, February 13, 2017 11:58 AM
>
> *To:* NSRCA
>
> *Subject:* [NSRCA-discussion] Futaba BLS173SV centering problem
>
> ï¿½
>
> Guys,
>
> I'm new to Futaba programable servos.ï¿½ Have new BLS173SV on ailerons and
> have a bit of "slop" in the servo output.ï¿½ I'm confident that the
> majority of the slop is in the servo, not the linkage.ï¿½
>
> ï¿½
>
> Should I need to replace gears after only a couple hundred flights?ï¿½
> Hard to tell, but seems like there is too much slop with power off, so
> adjusting settings may not be the answer.ï¿½ Can't find the gearset on
> Futaba or Tower website anyway.ï¿½ Anybody know the part number and
> how/where to order?
>
> ï¿½
>
> I was going to try reducing the deadband from .36 to .20.
>
> Recommendations on programable parameter settings improve centering?
>
> ï¿½
>
> Thanks,ï¿½ Dan
> ------------------------------
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>
>
> _______________________________________________
>
> NSRCA-discussion mailing list
>
> NSRCA-discussion at lists.nsrca.org
>
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20170214/306caa76/attachment.html>