VPI JMW 12.7 Spindle/pivot distance

Xupakabras, let me know whether you still need to find any info out. Since I'm in the States, it's much easier for me to try to call VPI than for you from Europe. I'll be happy to try to contact VPI and inquire on your behalf.

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.

Thanks to all

Best regards,
Paulo

This is an old thread, but it caught my attention
because I have been trying to refine the alignment
geometry on my VPI 12.7 tonearm (mounted on a VPI Classic 3 TT). I recently overcame my reluctance
to buy a Feickert protractor, and since I already
own a Fozgometer it didn't make sense to cavil
over a few more dollars to do the job right. I
spent about an hour tinkering with the protractor,
and the spindle-to-pivot distance proved to be 297
mm. That's 1 mm shorter than the 298-299 mm range
stated by VPI, and roughly 5mm shorter than the
302 mm measurement mentioned in this thread. I
have no explanation for this anomaly, except
perhaps that VPI was a hair off mounting the
tonearm to the plinth. After I finished aligning
the cartridge, I used the Fozgometer to adjust the
azimuth, and eventually got the signal strength of
both channels to within 0.5 db of each other. Good
enough, said I.