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Ok , mounting an accessory goes like this....
Once the vertical head is "flipped" and parked,you must loosen the clamp screws that secure the two parts of the "Y" ram together.
The "Y" ram is built in two sections...an upper and lower. Loosen the 4 clamping bolts accessible from the operators side of the "Y" ram...There are two in the rear half of the upper section (part that carries the manual speed range change knob) and two bolts in the forward half of the lower section of the Y" ram....
Once the clamps are loose, you can push the upper section to the rear, exposing dovetails and drive gearing that is there to accommodate spindle driven accessories.
Be sure to clean the rear portion of the dovetails that extend to the rear of the "Y" ram before moving the upper. These dovetails should be covered by an aluminum segmented cover (often missing)
I often squirt a bit of way lube on the dovetails before moving the top over it.
If your machine has not had the upper section moved in some time, likely its tight and difficult to move...coolant and dried lube can stick the upper and lower together making any move difficult....might
have to work at it a bit...but it will move once the clamps are loose......
On returning to use without accessory, be sure to tram the vertical face of the upper and lower portions of the ram...they should be flat to each other when trammed vertically within .001" or better.....
This can be a bit taxing as making small movements of the top can be difficult (stiction)....especially if the surfaces have residual oil or coolant on their mating surfaces....
Unlike the earlier FP4NC and FP3NC, there is no cute little chain drive setup to easily move the upper section of the "Y" ram...Its just an "Armstrong" thing.....
Cheers Ross
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