Lubrication; Scanning Process At Corners; Outside Corners - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

Lubrication

Scanning process

December 2001

During meander digitizing a very flat surface may cause little movement in the

probe axis. This can result in a lack of lubrication in the probe axis:

With MP6220 and MP6221, set the additional lubrication at the line end.

Traverse distance for lubrication of the touch probe axis at

0.000 to 999.999 [mm]

Time after which the probe axis must be lubricated

0 to 65 535 [mm]

The two parameters PP.INT (maximum probe point interval) and TRAVEL from

the "meander" and "contour line" scanning cycles operate as limit values.

Depending on the values that are entered for these parameters (see the

User's Manual), either the travel of the probing stroke or the probe point

interval is limited.

The travel determines the contour of the corners. The smaller the travel, the

more exact the resolution of the corner. If too small a travel is defined, it may

prevent the probe from getting clear at acute sharp inside corners (minimum

travel 0.1 mm).

On outside corners, having probed the last point (1), the touch probe moves

down the resultant straight line until it either makes contact again or reaches

one of the two limits TRAVEL (2) or PP.INT (3). The illustration shows how the

TRAVEL works as a limit and the touch probe returns to the contour (4) in the

opposite direction. The new scanning direction is defined by the probed points

(1) and (4).