Axminster SIEG X1 Super Micro Mill Mk2 User Manual download pdf (Page 16)

Settings and adjustments

Feed scales

The three thimbles that are mounted on the feed shafts of the worktable, the traverse feed and

the fine feed control should move freely with the motion of the handles and not slip. The thimbles

can be turned, using more force, independently of the handle in order to set a predetermined

start or finish point.

If the thimbles are ‘slipping’ i.e. not maintaining their place relative to the handle, whilst the

handle is turning; the cause is almost inevitably dirt, swarf et al., between the pressure plate and

the thimble. To rectify this, undo the nut and washer securing the handle to the shaft, remove the

hand wheel, and then remove the keyed collar and thimble assembly. Take care that the key does

not drop out of the shaft. Gradually separate the thimble from the keyed collar, by twisting and

turning, until there is sufficient space to clean the mating surfaces.

Warning The friction drive between the collar and the thimble is effected by a

wire spring (like part of a circlip) that is housed in a groove in the collar and rubs against

the inside bore of the thimble. If the collar and the thimble are separated too far, the

groove and the spring are exposed. The spring can fall out and if not lost, it is awkward

to re-compress the spring so that the thimble will slide completely back onto the collar.

Once the mating surfaces are clean, mate the key and the keyway and fit the collar/thimble

assembly to the shaft. Refit the washer and the securing nut, and tighten. Tighten until the

handwheel, thimble and collar assembly are too tight to move. Undo the securing nut a quarter

turn and check that the drive handle rotates freely and there is not excessive backward and

forward play in the shaft. (The handle etc, forms one side of the drive screw anchor into the

slide). Check the thimble remains synchronized with the handle whilst it is being turned.

Your Micro-Mill has been factory set and adjusted, however, during its life time you may

find occasion whereby the mill needs adjusting to maintain its accuracy and optimum

performance. These adjustments can be made as follows:-

Worktable and Traverse feed adjustment

The worktable and the traverse feed are both mounted over dovetail sections. In order to

maintain the ‘tightness’ of the fit; between the sloping surface of the component and its mating

surface a gybe strip has been inserted. (At the front of the worktable, and to the right hand side

of the traverse feed).

To adjust the gybe strips, use supplied allen key and spanner, release the lock nuts and screw

the gybe strip grubscrews clockwise to compensate for any slackness or anti-clockwise to loosen

the movement. Check, using the feed handles, that worktable and the traverse feed moves

smoothly, If not, repeat the adjustments until the movement is smooth and tight over the whole of

the travel.

Milling Head adjustment

The Milling Head is mounted over a dovetail section. In order to maintain the ‘tightness’ of the fit;

between the sloping surface of the component and its mating surface, on the left hand side, a

gybe strip has been inserted. To adjust the gybe strip, use the supplied allen key and spanner,

release the lock nuts and screw the gybe strip grubscrews clockwise to compensate for any

slackness or anti-clockwise to loosen the movement. Check, using the rise and fall drive feed

handles, that the head moves smoothly, If not, repeat the adjustments until the movement is

smooth and tight over the whole of the travel.

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Axminster SIEG X1 Super Micro Mill Mk2 User Manual Page 16

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