Scheu Cantus Tonearm Setup

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Scheu Cantus  Tonearm  Setup




Assumptions (for now):

The cartridge has already been mounted

The arm base is already mounted on the armboard, secured by Part (G) and (H)

Installer knows what VTF, VTA, Azimuth means



Pivot Tip and Pivot Tip Rest

The Cantus tonearm is a true unipivot design.  The armwand (K) sits on a sharp metal pivot tip, jutting out from (I). The armwand (K) has a pivot tip rest behind, near (D), just below (A).  Look at the photo above to roughly see where the pivot tip rest is positioned. 


The pivot tip rest looks like (M) below, which is taken from a photo of the Classic tonearm.  On the Classic tonearm, the pivot tip rest can be seen jutting out of the metal surface.  The pivot tip rest on the Cantus tonearm, is different from the Classic's in that it is embedded into the acrylic surface, and is not jutting out.  Being transparent in finish, the pivot tip rest's shaft can be seen, and serves as a guide when sitting the armwand (K) on to the pivot tip.

As the pivot tip rest is made of special steel you should not be able to destroy it when you do not get it to sit on the pivot tip during the first attempts.   Likewise, the pivot tip is also made of special steel.  So, don't worry, sometimes it takes a few attempts to sit the armwand's (K) pivot tip rest on the pivot tip.


How does one know if the armwand's (K) pivot tip rest is sitting properly on the pivot tip ?   Test by holding the sides of the armwand (K) near the pivot tip and lightly and gently push the armwand (K) forward or backward - the armwand should not move.  Otherwise, retry to sit the pivot tip rest again on the pivot tip, then retest.


Then test further by holding the headshell lifter (N) and swing to the left and right - it should feel very smooth in its movement, no friction at all.


Setting Up The Armwand

The Cantus has been designed that it will never drop to the floor in the event that the armwand (K) is detached accidentally from the pivot tip.  This is made certain by parts (B) and (C), which screw on to part (M) below.  During inital setup, part (M) has to be positioned where parts (B) and (C) can completely lock on to part (M).  Part (M) can be moved up or down by loosening part (F).


Part (M) includes the armlift controller (P).  This should be raised while positioning part (M).  With the armlift raised, Part (M) should be positioned where the armwand (K)  is raised just slightly above horizontal, without the armwand (K) falling off the pivot tip.  This will help ensure that the needle will clear even thick records when sliding the armwand (K) along the armlift to cue for playback.


Now adjust VTA roughly, instructions mentioned below. 


Then test movement of the arm across the entire breadth of the record.  Ensure that the armwand (K) does not hit any obstruction right up to where the needle will be at the edge of a record label.  Usually, during initial setup, it may hit the VTF weight  (E).  In such cases, you have to adjust part (M)  by loosening part (F).  Adjust it by rotating gently left or right, taking care to hold it in its original height position, tighten part (F) enough to hold it in place after each rotation.  Repeat test as necessary. When done, the armwand should no longer touch part (E), up to the point where the needle touches the record label edge.


At any rate, the goal is to get the arm to swing freely across the entire breadth of the record playing area.  After adjusting, ensure part (F) is tight enough to prevent part (M) from sliding down.  A strong finger-tight is fine.



VTA can be adjusted by inserting an allen key into a hole in Part (G).  The arm shaft can then be moved up or down manually.  After adjustment, tighten back securely.


VTF and Azimuth

VTF can be adjusted by moving the tracking force weight (E) across a slot, part (L).  It is extremely sensitive, slight movements alter VTF easily.


The tracking force weight (E) can also affect azimuth, so while setting up VTF, try to make part (E) to stay centered.


Once VTF has been obtained, lock it in place.  check azimuth.  To adjust it, insert an allen key into the part (D).  Hold on to the VTF lock, and used the allen key inserted in part (D) to very slightly rotate the tracking force weight (E) to swing either to the left or right, shifting its weight.  Check azimuth by sight, repeat procedure as necessary to adjust it.  For final check, particularly for cartridges where checking azimuth by sight is difficult, use a tool like the HiFi News Producer's Cut LP to test.



Anti-Skate can be set by rotating part (A) counter-clockwise.  It is very sensitive, and works by twisting the tonearm leads cable to get the proper setting.


We use the Cardas Test Record's blank grooves to set anti-skate.  With the correct setting, the needle should slide across the blank grooves slowly inward (i.e. towards the record label).  Adjust until this is achieved.


Some argue that in time, marks are made on the blank grooves and that the needle will follow this path.  It does not matter, what we are interested in is the speed in which the cartridge will move inward.


One can also use the HiFi News Producer's Cut LP to set anti-skate.


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Scheu Cantus Tonearm Setup

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