Hi Gene,
I have a Logan 400 lathe and the cross slide isn¡¯t set up well for a DRO- it¡¯s super small. ? There are super small magnetic DRO¡¯s being sold now that can fit better in a conventional manner but are a little more expensive. ? Glass scales can easily mount to the Z axis and are well proven technology. ? Glass sales are also less affected by temperature differences than are magnetic scales which is probably more important on the longer Z ax. ?Yuri¡¯s board with the DB9 connectors will work with either the super small magnetic scales or glass scales. ? Apparently, the refresh rate is faster with magnetic and glass scales, but this probably isn¡¯t a discernible change. ? Glass and magnetic scales are also more tolerant to radiated and conducted EMI, so there may be less flickering of the readout. ? Typically, the scales are more accurate as well (when compared to capacitive scales).
For me, the key selling point is that the magnetic ?scales are much smaller and fit my X axis better. ? I am offsetting the higher costs of the magnetic scales with a glass scale on my Z axis(which is probably a better option for the Z axis anyway).