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7x10, 7x12, 7x14 Mini-Lathe Information
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SIEG X2 MINI MILL
- CNC V1 - CNC V2
- STUFFMADE - REDUX
HOW-TO Tram Your Mini-Mill
there are simple ways to quickly get
the head trammed and more accurate ways. we'll start with the quick and
| x-axis the quick way
| when you first get your mill, you should at least
check for head square-ness in relation to the table.
i have the vise mounted here. DO NOT do it this way.
this is only for representational purposes. pretend the top of the vise is
the top of the table.
put a right angle of precision and check to see if
the spindle is square to the table. if not, using that huge wrench that
came with your mill, unscrew it a bit to loosen the column. (the nut in on
the back of the mill.)
adjust accordingly and tighten.
| x-axis the accurate way
| again, pretend that the end of the vise represents
the top of the table.
here we've use the DTI (dial test indicator)
mounted to the spindle. it's of the 0.0005" resolution variety. each tick
we've turned the face dial so
that it reads 0.
| turning the spindle by hand (from the top of the head
in this case), make a sweeping motion until it reaches the other side of
the table (in this representation, the other side of the vise).
note that it now reads just shy of 7 ticks. let's
round up. that's 7 * 0.0005" = 0.0035". not bad. not great. so we'll need
to adjust the column by adjusting the nut as described in the previous
of course, this is in a span of about 3". imagine
the differential as we go further out. luckily for us, the x-axis travel
is only about 7" in length. so that would equate to about .007" or so (not
exact numbers here) over that span. not great. not so bad.
so, based on a quick eyeballing, our read based on
the quick right angle setup yielded this accuracy. not bad really. if your
machining wood and other less dimensionally tolerant materials, maybe this
Tramming the mini-mill is much easier than tramming a round-column mill since the mini-mill has different articulating points for the X and Y axes whereas the round-column uses a single "point" for X and Y articulation.
Looking for mini-mill help and how-tos? How about lathe help and how-tos?We're prototyping a benchtop CNC vertical mill using the DigiSpeed-XL interface card for Mach, Dart Controls and KB Electronics KBIC/KBMM 90VDC motor controllers, 1.5HP treadmill motor from Surplus Center and a R8-spindle head from the X2 mini-mill - not to mention Gecko servo drives and an entirely closed-loop system. Come take a look!
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