[GreenKeys] Spacing Was: M28 Troubleshooting Question

Sat May 4 23:05:16 EDT 2013

For those curious, here's a pic of the offending part causing the spacing issue (center of the pic). The spacing drum is in the lower rt corner for reference. If you don't see the pic, and would like a copy, contact me directly. 

I'll dig into the parts books tomorrow to ID it. -Cory

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On May 4, 2013, at 4:54 AM, Steve Garrison <steve.n4tty at gmail.com> wrote:

> I've seen just one picture so far and it was on a group email not a direct to me email.
> 
> Steve G./N4TTY
> 
> 
> On May 4, 2013, at 1:07 AM, Raymond Cote <bluegrassdakine at hotmail.com> wrote:
> 
>> Are the pictures just going between you two or are we to be included?  Just making sure that I am not working here with a less than optimal computer
>> 
>> 
>> 
>> On May 3, 2013, at 20:24, "Steve Garrison" <steve.n4tty at gmail.com> wrote:
>> 
>>> Cory,
>>> 
>>> Last picture came through fine.  And I would  guess that others may have told you that spacing while running open is not normal.  Running open is akin to receiving the 'blank' character, and it shouldn't space on a blank character.
>>> 
>>> Maybe another picture would help, but would removing the front plate enable you to get to the bad part?
>>> 
>>> Steve G./N4TTY
>>> 
>>> 
>>> On May 3, 2013, at 9:02 PM, Cory Heisterkamp <coryheisterkamp at gmail.com> wrote:
>>> 
>>>> Found it!  Problem is, it's what you might call a hardware failure. There's a bracket that supports the pivot that plays a part in positioning the type box that fatigued and broke away from its fastener. It's semi-captive because of where it's buried but it appears that when the type box is required to line up for B,G,O, the angle is such that play in the mechanism is at it's max and the whole type box moves out of alignment. For the other rows it's either over center or under center of it's pivot.
>>>> 
>>>> Of course it's in one of those 'how am I going to get to it' spots and is a multi-function part. 
>>>> 
>>>> Did my last pic make it? If so, I've got a snapshot.  -Cory
>>>> 
>>>> On May 3, 2013, at 7:08 PM, David Christ <radioham at mchsi.com> wrote:
>>>> 
>>>>> The picture helps a ton.  It is now obvious what is going on but I don't know why.  The three letters that are misaligned are B G and O.  When you look at the position of these letters you will find that they are all in the rightmost row of the typebox when viewed from the front of the machine.  Note that D is one row to the left of B.  Tells me that the typebox is slow in positioning to the rightmost row or held back somehow.  I wonder if there is a little binding or something that is slowing down the positioning of the typebox.  Make sure that you are not using too heavy a lubricant.  Oil not grease and a light oil at that.
>>>>> 
>>>>> My best guess of what is happening.
>>>>> 
>>>>> David
>>>>> 
>>>>> On May 3, 2013, at 6:44 PM, Cory Heisterkamp wrote:
>>>>> 
>>>>>> 
>>>>>> 
>>>>>> All four boxes yield the same results and spacing is consistent if I print the same character repeatedly. If I type the alphabet, B, G, O and Q are right justified to the point of printing onto the edge of the following character, the other letters space correctly. At 100WPM the justification is slightly worse than at 60. 
>>>>>> 
>>>>>> Good idea on Figs David, I just checked and the figs are rt justified the same amount as their letter equivalent. 
>>>>>> 
>>>>>> I've attached a jpeg but it might get stripped from greenkeys.
>>>>>> 
>>>>>> Cory
>>>>>> 
>>>>>> <image.jpeg>
>>>>>> 
>>>>>> On May 3, 2013, at 5:28 PM, David Christ <radioham at mchsi.com> wrote:
>>>>>> 
>>>>>>> Do all four of your typeboxes act the same way?  If not then the typebox is  probably the problem.  Does it have bent pallets?  Do any stick?
>>>>>>> 
>>>>>>> What about 9 and ! which are the same codes only in FIGS?  Are there any other pairs that seem to be off?
>>>>>>> 
>>>>>>> Pick a letter with a central beam like T .   Type an entire row of that letter.  If the spacing mechanism is working the vertical lines should be spaced evenly.  Try  it with F and then O on the next two lines.  Everything should line up.
>>>>>>> 
>>>>>>> Just some thought on trying to work out what is working and what is not.
>>>>>>> 
>>>>>>> David
>>>>>>> 
>>>>>>> On May 3, 2013, at 5:02 PM, Cory Heisterkamp wrote:
>>>>>>> 
>>>>>>>> By Jove, I think I'm 95% there. Apparently the spacing when running open is normal. After making some repairs to the keyboard and bringing a 60ma supply over from the other building we are in business. The only issue I'm seeing is the spacing of some letters when printed. The letter keyed is always correct, but some letters 'bunch' (they are consistently the same letters, such as O and F together).  -Cory
>>>>>>>> 
>>>>>>>> On May 3, 2013, at 12:15 PM, David Christ <radioham at mchsi.com> wrote:
>>>>>>>> 
>>>>>>>>> Do you have 60 ma loop current going through the selector magnet?
>>>>>>>>> 
>>>>>>>>> David
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> On May 3, 2013, at 11:59 AM, Cory Heisterkamp wrote:
>>>>>>>>> 
>>>>>>>>>> Hi guys,
>>>>>>>>>> 
>>>>>>>>>> So I'm in the process of bringing a (new to me) 28 back into service after several years storage. This week I've managed to degrease the keyboard/base and the typing unit, and have lubed them according to the books. Everything appears to move freely.
>>>>>>>>>> 
>>>>>>>>>> What I'm seeing when 'hand powering' the typing unit is a series of spaces until it reaches the end of the platen. Is this normal or should the printing mechanism 'jump' in place? I can force a Car Ret by faking out the codebars during rotation.
>>>>>>>>>> 
>>>>>>>>>> When the TU is on the KB/base and I power the motor directly, I get the same result (obviously) along with a jumping 'Keyboard Lock' key. 
>>>>>>>>>> 
>>>>>>>>>> Is this normal? Anything obvious I should check?
>>>>>>>>>> 
>>>>>>>>>> Thanks,
>>>>>>>>>> Cory Heisterkamp
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