![]() So much for “offset angle creates skating”. In this second video, the cartridge has been twisted in the head shell to eliminate the offset to 0 degrees and the skating force is for all intents and purposes identical to what’s seen in the first video. In this first video you will see, using a blank record, (just for demonstration purposes don’t use a blank record to set anti-skating!), skating on a typical “S” shaped arm fitted with a spherical stylus cartridge, the importance of which will be discussed in a later video. These videos are used permission of WAM Engineering Ltd.: For instance, Rega’s older RB250’s geometry is: 222mm pivot to spindle, 15mm overhang and 237mm “effective length”. The arm’s effective length is the pivot to spindle distance plus the overhang. The “overhang” is the distance from the spindle to the stylus tip. The actual arm length is the distance from the pivot to the spindle. In the case of “overhang” it literally means the number of millimeters the stylus tip “overhangs” the spindle were you able to place the arm directly over the spindle. Both are related to minimizing LTE (“lateral tracking error”). But before getting directly to the point, it’s key to remember why in the first place, pivoted arms have “offset angles” and “overhang” (I know many AnalogPlanet readers know all of this but hopefully this post will attract many others who don’t know this). I like their water skiing analogy, about which you can read here. Boisclair and Wally’s son and mechanical engineer Andrzej. That’s what my late mentor Wally Malewicz taught me, and it turns out to be incorrect, as proven by a collaborative effort between Wally’s “right hand man” J.R. Yes, skating begins with friction in the groove and it is caused by a “vector force”, but skating is not the result of your tonearm’s offset angle, either at the head shell or produced by an “S” shaped arm. Well, that’s a clickbait headline for sure, but unlike most it’s probably true, especially if you’ve taken my word on this. ![]()
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