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BFB 3000 Operations manual
The co-ordinate system
The co-ordinate System
The BFB 3000 co-ordinate system is the standard Cartesian co-ordinate system using X, Y & Z to define the head position. All
units are millimetres (1” = 25.4mm). The BFB 3000 displays the head position accurate to 2 decimal place i.e. 0.01mm (0.4
thousands of an Inch). This is not the same as resolution or absolute accuracy which are both affected by the mechanics of the
machine and are not be this accurate.
Table co-ordinates
It might be easier to view the print table as a sheet of graph paper, and therefore, that each point of the table has an X, Y co-
ordinate we can send the tool head to. The axes are set such that the centre of the table is the origin at X=0, Y=0.
Looking down on the table with (0,0) at the centre, a positive(+) move in X would be a move to the right of centre. A + move in Y
is from the centre to the rear of the machine, exactly as the standard graph representation drawn on paper.
e.g. If we pass the machine an instruction to go to point X50, Y50 if starting from the origin, the tool will be sent 50mm to the
right in X and 50mm to the rear in Y
X-50,Y-50 would do the opposite and send the tool 50mm to the left in X and 50mm forward of centre in Y.
The four quadrants as follows.
X+, Y+ Rear, right hand 12 – 3 O clock
X+, Y- Front, right hand 3 – 6 O clock
X-, Y- Front left hand 6 – 9 O clock
X-, Y+ Rear left hand 9 – 12 O clock
We are also able to move the Machine in the Z axis, this being a straight line through the origin perpendicular to X and Y. For the
BFB 3000 we have defined Z = 0mm when the tool is just touching the top of the table (or work piece). A 10mm + move in Z will
move the table down giving the tool an elevation of +10mm above the table. A - move in Z would move the tool into the table or
work piece.
(7 strony)
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