[R-390] R-390/URR

[rbethman]

Bob,

Everyone is giving advice that would follow BINDING.  You use(d) the 
term BACKLASH.

I'm trying to understand WHICH it is - BEFORE sending you down a path.

Bob - N0DGN

Bob Young wrote:
> Hi Bob,
>
> This is excessive, I have 2 390's and 2 390A's, this is the only one 
> that does it, I haven't had it on for a few weeks, I'll let you know 
> tomorrow how much it moves.. Also it worked well with no backlash 
> until after I decided to adjust the Oldnam coupler after I had 
> installed the new PTO, when first installed there was no backlash.
>
> Bob
> KB1OKL
>
>> From: rbethman <rbethman at comcast.net>
>> To: r-390 at mailman.qth.net
>> CC: Bob Young <youngbob53 at msn.com>
>> Subject: Re: [R-390] R-390/URR
>> Date: Sun, 28 Oct 2007 12:49:16 -0500
>>
>> Bob,
>>
>> The FIRST question - Describe what YOU call "backlash".
>>
>> Backlash is "normally" the free-play inherent in a geared system.  A 
>> certain amount is NECESSARY to prevent the gears from destroying 
>> themselves.
>>
>> Bob - N0DGN
>>
>> Bob Young wrote:
>>> I'm working away on 2 390's also, got one running pretty well so 
>>> far, it really just needed a good electrical alignment, I need a 
>>> couple of crystals for it. I haven't checked the cams yet though. 
>>> The bands are uneven. I changed the PTO in the other one, I'm 
>>> getting severe backlash, not sure why yet, I think the oldham 
>>> coupler is hooked up ok although it didn't have backlash until I 
>>> decided that the oldham coupler two sides needed to be closer 
>>> together after I put it in.
>>>
>>> I'll check mine tomorrow for those readings and see what I get on E210.
>>>
>>> Bob
>>> KB1OKL
>>>
>>>
>>>
>
>
>