1214. Arm height and depth (screw 48). And screw 231?

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nonost
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1214. Arm height and depth (screw 48). And screw 231?

Post by nonost » 13 Jan 2020 00:23

Hi! Today I've been playing around with my 1214. Please someone correct me if I'm wrong but to me it looks like the screw 48 sets both arm maximum and minimum height. Now that the arm goes higher, the cue lever engages so much better. Actually it works perfectly. Before that I had to be very carefully when engaging it, it didn't want to stay in place. The thing is the stylus is also now a bit higher than before, so that leads me to think that the screw 48 sets both heights. Here some pics:
photo_2020-01-13_01-06-42.jpg
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photo_2020-01-13_01-06-27.jpg
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Does it look ok?

Also...what is the purpose of screw 231? In that model the arm goes to its maximum height when the cue lever is engaged (the auto mechanisms don't make the arm go higher than this). So, what am I missing?

This machines are lovely.

dualcan
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Re: 1214. Arm height and depth (screw 48). And screw 231?

Post by dualcan » 13 Jan 2020 18:14

Hi,
The eccentric 48 (not a bolt) is indeed to set the range for the arm height- see this thread;
viewtopic.php?f=37&t=115688&start=15
with this explanation:
"As far as the eccentric 48, it is used to adjust for min/max tonearm height. This is a crucial adjustment because the arm needs to go high enough to clear the arm rest edge, but not too high to strike the records still on the AW3 automatic spindle during the arm's transit to rest post. All Dual changers from the 1010 onward till the 1216 use this type of limiter on the rock in various guises.
The 1218 and onward, use the improved cue lift system which has the cueing silicon in the lift barrel, whereas the changers numbers below (1009sk till 1216) all used a separate added cue cam and levers. With that change on the 1218, the arm limiting. done previously with 48 in the 1214, is now done with two separate items.
Looking at the 1218, the max arm height (to avoid striking stacked records), is done by nut 55, but there also needs to be free play on the 1218 (etc.) arm so as not to bind to that max height selected by 55, otherwise the arm won't move horizontally. For that freedom of arm movement, the limiting height is made with lift barrel 65. Between 55 and 65 settings, the free play obtained is similar to the 1214's (etc.) free play, found between the two fingers of 15 that the eccentric 48 touch."
For bolt 231 have a look at Fig 11 page 8 of the service manual to understand that adjustment.
Regards,
k

nonost
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Re: 1214. Arm height and depth (screw 48). And screw 231?

Post by nonost » 19 Jan 2020 00:32

Oh! Got it. For some reason I thought that in that model the max height was the same as the lift height. I was totally wrong. Now it all make sense.

Does the min/max height look right in the pictures above?

Thanks Klaus!

dualcan
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Re: 1214. Arm height and depth (screw 48). And screw 231?

Post by dualcan » 19 Jan 2020 02:01

Hi,
For all the changers from the 1009 till 1216 in one place or another, in the arm bearing bracket, the arm is adjusted by a single and similar min/max adjustment.
For this, the adjuster must be set to meet to parameters,
1. It must clear the underside of stacked records on an auto spindle for obvious reasons,
2. It must let the arm /descent enough to let the stylus go below the platter surface in order that a 45 record is contacted throughout play.
The descent I see on the M75 seems to fill the "low" criteria.
For the separate cue lift, the suggested height is that it still lifts off from a mid stack record.
That would be the fifth for the 1000 series and fourth for the 1200 series. Nothing says you can't increase or decrease this.
Different cart heights will also need re adjustment.
Regards,
k

nonost
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Re: 1214. Arm height and depth (screw 48). And screw 231?

Post by nonost » 22 Jan 2020 00:31

Got it! I will do the adjustment in the next days. I had the min/max arm height and lift height so bad that I'm afraid that was the reason the cue lever refused to stay in place when the arm was lifted. I will comment the results ;)

Thanks a lot.

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