I just picked up this collins microflat 18x24 surface plate, advertised as grade A. I plan on getting it resurfaced/calibrated to AA so i was checking the mounting points to see if pads were already attached. I found that there were 3 pads attached but there were 4 points marked in yellow ink shown in the picture below( with the single point that should be centered being instead two points positioned off to either side). This wasnt original was it? Should i just reattach the pads at the normal 20% positions before having the plate resurfaced and calibrated?
Also the plate seems to be in relatively good condition, for the most part very smooth. There is a small chip(maybe .070") here and there, that shouldnt hinder it from being recalibrated to AA should it, since they are small low spots and dont really affect the bearing surface?
Also the plate seems to be in relatively good condition, for the most part very smooth. There is a small chip(maybe .070") here and there, that shouldnt hinder it from being recalibrated to AA should it, since they are small low spots and dont really affect the bearing surface?