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sailor
Registered: Jan 2002
Posts: 90 |
Release id #194046 : 1541 Speed Test
Regarding the alignment, would you elaborate your thoughts on the following: (from the docs)
Quote:F3 align the head to track 42 in a better way than other programs do.
F5 moves the head to track 1
How to correctly align a drive:
1) gently unscrew the screws of the track 1 "stop"
2) press F3
3) press F5
4) gently move the track 1 block so there is 0.25 mm (a hair or little more) between the block and the head the head.
5) screw the screws tight carefully checking the block is still at 0.25mm from the head.
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sailor
Registered: Jan 2002
Posts: 90 |
I don't think zero stop and alignment are the same thing tho... And if you follow Commodore recommendations they state an AAD is required to test the alignment. |
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chatGPZ
Registered: Dec 2001
Posts: 11379 |
changing the zero stop will... change the track 0 location. it is totally unrelated to the track alignment or even azimuth (yes you need a scope and an alignment disc). oh well >_< |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
As the "master of the obvious" just wrote, it was obvious that for "alignment" I intended the track 1 location.
I didn't think it was even needed to be explained in this so "elite" forum.
Even in the commodore service manual is described a similar procedure to correctly set the track stop. |
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SLC
Registered: Jan 2002
Posts: 52 |
Regardless of how "elite" the users here are (and rest assured, there's lots of less knowledgeable people here too), you should make sure not to confuse two completely different things such as alignment and track 0 stop/calibration. This can confuse others, or even mislead them. |
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chatGPZ
Registered: Dec 2001
Posts: 11379 |
This constant mixing up and/or imprecise use of certain terms seems to be a reoccuring problem. Just using the correct terms will help :) |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quoting SLCRegardless of how "elite" the users here are (and rest assured, there's lots of less knowledgeable people here too), you should make sure not to confuse two completely different things such as alignment and track 0 stop/calibration. This can confuse others, or even mislead them. You are right. I often overestimate people. |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quoting GroepazThis constant mixing up and/or imprecise use of certain terms seems to be a reoccuring problem. Just using the correct terms will help :) If you could just code as correctly as you speak you would be great. |
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chatGPZ
Registered: Dec 2001
Posts: 11379 |
Again mixing up the terms. Fine :) |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quoting GroepazAgain mixing up the terms. Fine :)
Quoting 1541 User Guide
An alignment problem may develop gradually or suddenly. Most alignment problems
are caused by the slipping of the drive wheel on the shaft of the stepper motor which
is used to move the record/play head from track to track. Slippage occurs because the
drive wheel is only press fit on the stepper motor shaft. There is no set screw or
keyway to maintain the correct alignment. When the 1541 has been operating for
long time, it gets hot inside, the metal parts expand and the drive wheel may slip if
stress is applied. Normal accessing of files does not produce enough stress to cause
problems. However, slippage will occur if there is bump to track 1. When the drive
does bump, the stepper motor attempts to move the head outward total of 45
tracks. This is done to ensure that the head is positioned over track 1. lobe on the
stepper motor drive wheel hits mechanical stop to prevent the head from moving
past track 1. It is the hammering of this lobe against the mechanical stop that causes
the clatter each time you format diskette or when the drive is attempting to recover
from an error. If bump occurs when your drive is hot, some slippage is likely.
I called it alignment as it is called in every guide or book or even the service manual. |
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chatGPZ
Registered: Dec 2001
Posts: 11379 |
Alignment is what you adjust by moving the stepper motor position, not the track 1 stop. And the above quote doesn't say otherwise. The track 1 stop only defines which stepper position is track 1, no more no less. |
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