Fagor America CNC8070 - Manual (Page 323)

‡ ‡ ‡ ‡ ‡ ‡ ‡ ‡ ‡ ‡ ‡ ‡ Operating manual
CNC 8070
SETUP ASSI
STANCE
The
ci
rc
ul
ar
it
y (
roundne
ss)
t
e
st
13.
(S OFT V03.0 X )
289
13.3.2 Configuring and executing the circularity (roundness) test
The process consists in executing a circle with the axes of the machine and verifying
it on its graphic representation. The graphic shows the difference between the actual
(real) coordinate obtained from the feedback device and the theoretical coordinate
calculated in that point. This difference is shown projected radially.
The interpolation of the machine axes and the point capture for the graphics are
initiated separately. The data capture is handled from the softkey menu whereas the
movement of the axes is controlled from the operator panel.
The adjustment process is repeated until obtaining the best adjustment of the axes.
The circularity (roundness) test diagram is an assistance tool that only shows the
response of the system to the various settings (adjustments); it is up to the technician
to choose the best adjustment.
How to execute the circularity (roundness) test
Basically it is done as follows. Each of these points is described in more detail in the
indicated chapter.
The configuration used may be saved in a file for later.
1. Before initiating the process, certain aspects must be configured as well as the
graphic environment, the circular interpolation, the values of the parameters
involved, etc. See
"13.1.4 Machine parameter editing" on page 277.
A previously saved configuration may be used.
2. Execute a circular interpolation of the machine axes. The axes must be moving
before the data capture starts. See "13.3.4 Define and execute the movement
subroutine" on page 291.
3. Initiate the data capture and the graphic simulation. Once the axes are moving,
the data capture for the graphics may begin. While capturing data, the position
error at each point is drawn on the graphics. See
"13.3.5 Data capture for the
graphic" on page 292.
4. Optimize the adjustment by changing some machine parameters of the CNC or
of the drive. This makes it possible to evaluate the system response to these
changes and optimize the adjustment. See
"13.3.6 Adjustment of the machine
parameters involved" on page 293.
5. Save the modified values and the configuration used. See "13.3.7 Validate the
changes and save the configuration used" on page 295.
Move through the data
To enter or modify a data, it must be selected; i.e. it must have the editing focus on
it. To select a data, use the [
§][¨][©][ª] keys.
The data are accepted with the [ENTER] key. Before accepting a data, it is checked
out and if the data is not correct, it is not accepted.