The document provides installation instructions for upgrading the Precision Matthews 833t CNC machine. It involves completely disassembling the machine down to the base. Key steps include installing new ball screws for the Z and Y axes, adding oil lines, attaching motor mounts, and reassembling the machine. The instructions note some parts may require modification for clearance and recommend at least two people for installation due to the machine's size and weight.

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Installation Instructions for
the Precision Matthews 833t
heavymetalcnc.com

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You may have some clearance issues with the table.
Some grinding or machining may need to be done.
There may also be clearance issues with the ball nut
block for Y. The slot in the base can be widened out
remove any interference.
This is a big, heavy machine. You will need some type
of hoist for the Z axis motor and spindle. We don’t
recommend trying to do this without at least two
people.

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First things first. We will strip the machine
completely down. You are going to take this apart
until there is nothing left but the base.

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This is looking at the Z saddle. As you can see,
we have taken the column off as well.

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There is no trick to taking this apart. It must
be completely taken apart. Including taking
off the column. It has to be taken off to install
the Z axis ball screw and ball nut.

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Drill and tap 4 holes M6 X 1mm, On the top of the
column. Use the base plate as a template for the
holes

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Drill and tap a M6 X 1mm hole on the Z
ballnut block that is attached to the saddle.

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This is to bolt down the oil lines

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Attach the flange for bolting down the ball
nut

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Attach the oil lines to the block using the
tapped hole you just created.

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Move the ball nut down to this position for the Z
ball screw. This is the bottom of the screw

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Bolt down the ball nut to the aluminum
flange. It bolts down with 3 cap screws

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The one free oil line will go into the tapped hole
on the ball nut. Be sure to position the ball nut
accordingly

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Now you slide the Z saddle onto the ways. It just
barely fits. You could also grind away the corners
at the bottom of the ways just a bit if it doesn’t
quite fit.

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Put the gib back on and tighten it up.

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Bolt on the bearing block and tighten the jam nuts
Now is a good time to check alignment, and get
everything sliding back and fourth smoothly. It’s
easier to do while the column is laying down on
the bench.

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Pick up the column and bolt it back on

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The Z assembly for the top of the column

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The motor plate is slotted for tightening the belt.
We had to use a timing belt due to the location of
the ball screw. It is so far forward it would cause
interference to try and make it direct drive.

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Now move on to the Y axis. Slide the ball
screw underneath the base

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Slide the saddle on to the ways

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Bolt down the block with this cap screw. We had
the front of the base off the bench to get a hand
underneath to line it up.

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X ball nut block

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The motor mount will install to the right

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Last but not least, the cover plate where the Z
axis handle was.