The entire range of DECO single spindle machines can be used for polygon operations. The aim of this article is not to explain the principle of polygon functioning but to provide greater detail when this principle is applied to the TB-DECO.
 Radial polygon milling attachment, max rotation speed 8000 RPM. Function G ?51 Polygon mode is initiated by code G ?51. The question mark identifies the slave spindle number. For example: spindle S2 to be synchronised, code G251, spindle S5, code G551. Two parameters must be programmed after G ?51. 1. Parameter R Parameter R contains the polygon ratio between the master and slave spindles. This ratio will determine the number of faces, which can be obtained for the part. Reminder: number of faces on the part = number of cutter teeth x polygon ratio R. For example: parts with 6 faces, cutter with 3 teeth = ratio of 2! Tip: A ratio of less than 1 can be programmed in R as follows. Take the ratio in the form of a fraction, multiply the denominator by the factor 256 and add the numerator. For example: ratio 1/2 = (256 x 2) + 1 = 513. Input R513 and the slave spindle will turn at a ratio of 1/2 compared with the master spindle. 2. Parameter Q Parameter Q acts on the angular phase shift expressed as a [°] of the polygon form. If a polygon phase shift is required in relation to another form of machining, then apply the following rule: Phase shifting in degrees must be multiplied by the polygon ratio contained in the variable R of code G ?51. Warning! A negative value in parameter Q reverses the slave spindle direction of rotation. On the other hand, value Q-0 does not reverse the direction of rotation. THINK PARTS THINK TORNOS ascl.com |
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