Since the spindle to pivot distance is known, you can figure the rest by using this calculator:
http://www.vinylengine.com/tonearm_alignment_calculator.php
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VPI JMW 12.7 Spindle/pivot distance
Since the spindle to pivot distance is known, you can figure the rest by using this calculator: http://www.vinylengine.com/tonearm_alignment_calculator.php _____ |
I am very grateful Actusreus for wanting to help me, but finally VPI responded to me. According to VPI "the 12.7 geometry requires a mounting distance of spindle to pivot of 298-299 mm. Spindle to center of mounting is 265mm the pivot point is offset and is not where the mounting is". Now I am even more confused because someone who has a dedicated Wallytractor for VPI JMW 12 tonearm series reported the following: "The effective length is 315mm; pivot-to-spindle distance 302.1mm for JMW 12, 12.5, 12.6, 12.7 Tonearms" Something is wrong here a difference of 1mm is not critical but 3/4mm difference is relevant. Anyway since the VPI provides no information on its website here are the information to someone who needs them ... They are not accurate but better than nothing. |
Xupakabras I also saw the Wallytractor add with the stated 302 mm for the spindle to pivot length. I have had a mint protractor made for my JMW 12 tonearm and made my own measurements.I measured exactly 298 mm for the spindle to pivot.From the info from VPI I'm sure 298-299 mm is correct.Hope this helps. |