NSM ESV grabber help

[strobey]

Hi,

Got an NSM Wizard which has recently stopped picking up discs.



Reading through the manuals it seems that ES5.1 have an auto calibration feature at P158/159 but apparently no such thing for this ESV.

On the rear of the CD unit there's 4 screws with adjustments to raise/lower the grabber mech against the belt...



...and this does change the problem of it being too high vs too low, but it's a pain to get to and adjust to then reassemble and see you gone too far in the other direction.

I've done this 4 times now and given up. It feels like a course adjustment.

There HAS to be a way to calibrate the fine steps in the programming..!?

In P157 you can manually control the assy and fine step until the alignment is perfect, but when you call for a disc it resets a couple of steps fwd/back to the wrong posn.

Is there a way other than trial and error with these rear screws?

Thanks for any advice

Tim

 

[Paul]

@Pick Holder

 

[ronnie63]

Is it failing to grab all selections or just a secific area?

 

[strobey]

All selections. I can see the resting place for the grabber is a few mm out on every selection.

The rear adjustment just feels too course to be a solution?

I should also mention that the discs weren't fully seated on the CD transport and it wasn't properly spinning a disc up, you could hear it slipping.

That's since resolved after the rear adjustment but it started at the samr time as it failing to select discs

 

[ronnie63]

there is a small amount of up down travel on each rack, I have seen me pack one up a bit as it was missing some of the trays, bit of a pain but it reolved the issue

 

[strobey]

I'm wondering if that rear adjustment just levels the cd changer. I've got it better on one side but it's still not putting the disc down far enough on the transport. Still slipping when spinning up.

Cuppa tea and a think about it I reckon.

 

[strobey]

P157 is very useful for testing this and this page is pretty self explanatory:


But then here's the money page. However I must have read this 20 times and I'm still not sure what I should be adjusting. If it wasn't a photocopy from 30 years ago I'd swear it was written by AI

 

[strobey]

I've got pickup sorted for now by adjusting the big hex nut at the back which levels the magazines.

But the grabber is still not returning low enough on the cd transport. The magnet "cup" i can hear is engaging but it's slipping when the disc tries to spin up.

In the P157 test, if I bring a disc fully down, then manually step it down 3 more steps with button [7] before playing, it's fine.

But then the end stop position is offset from what the cpu remembers, so when the disc is returned it's 3 steps too low and crashes into another disc in the magazine.

The problem is there doesn't seem to be any adjustments for setting the end stop position, despite the above saying:



The light mask is a piece of steel screwed to the base. Not adjustable, save filling it down. It doesn't have an "angle".
The opto PCB on the grabber has screws which loosens it, but not for fine adjustment.

Also (16) doesn't exist on the drawing:



So I'm fairly stumped. One thing i realised is that the belt adjustment (03), which has slotted holes and so definatley is a valid adjustment, does nothing to help this problem. It's moving the entire mech on the belt including the "OPEND" opto, so the opto just gets interupted earlier/later on the belt travel. The final end position is the same (since it uses the opto to determine that end stop!)

The thing is this suddenly started happening one day, like something failed or mechanically shifted.

Not expecting an answer to this but any spitballing welcomed!!

I swear I'm going to start an ESV wiki when I've figured one this out!!