Specialized Concentrated Focused
Advantageous Functions
「
75
」
worktable is shown in Fig. 6-2, and the curve of horizontal section is during the idling of servo motor,
while worktable has no movement. The actual moving curve of worktable is shown in Fig. 6-4.
A Hysteresis feature
B Actual moving curve
L(actual value)
S(nominal value)
L(actual value)
S(nominal value)
Fig. 6-2 Backlash error principle illustration
The popular explanation is: because the slider is generally fixed on a lead screw whose outer wire and
inner wire can not be completely matched, backlash compensation compensates the clearance
between the lead screw of last direction that the slider needs to finish after reversing its moving
direction.
6.1.2. Method for Lead Screw Error Compensation
Actually the system has already combined the above two errors to deal with and will execute error
compensation automatically based on the error data in the file after the backward error and forward
error of the corresponding nominal coordinates of each coordinate axis are listed into the lead screw
error compensation file.
Lead Screw Error Compensation File
The name of lead screw error compensation file is
axeserr.dat
, found under Tools folder of the
installation directory (like C:\Program Files\Weihong). Modification to the data in the lead screw error
compensation file will become valid after the software is restarted.
The file format is:
1) Firstly specify length unit, currently the supported length unit is mm and the style of writing is:
unit=mm
2) Then specify error sequence of each axis. To work properly, the contents in this sequence must be
arranged in the ascending order of position value from small to large, as follows:
[Axis.<Axis Name>]
<Position>, <Forward Error>, <Backward Error>
<Position>, <Forward Error>, <Backward Error>
<Position>, <Forward Error>, <Backward Error>
Among them
, <Axis Name> is X, Y, Z… (Case-insensitive)