2.
INCH
-
Hold down both the "Power" button and the "X" axis button while you plug the
power cord back into the display unit. After the display comes up, release the buttons.
The display should now read in inch dimensions.
3.
METRIC
-
To initialize your display unit to read metric dimensions, hold down the
"Power" and "Y" buttons while plugging the power cord back into the display unit. Once
initialized, the unit will always read in your chosen system of measurement each time it is
turned on unless you change it.
NOTICE! The Display Does Not Convert Dimensions from Inch to Metric!
The DRO reads rotary handwheel movement and converts it to a linear dimension based on a
formula assuming a certain leadscrew thread pitch.
The DRO must be set to agree with the
leadscrews installed on your machine to provide accurate measurements.
The only difference between the inch and metric DRO kits is the number of divisions engraved
into the handwheels. The electronics package is the same for either and can be set to read in
either measurement system depending on the leadscrews of the machine on which it is installed.
Setting the backlash compensation values
To set backlash compensation for each axis, you must first measure to determine what the
backlash is. Use a dial indicator to determine how far the handwheel on each axis rotates before
the table starts to move. (If this amount is excessive, see your instruction manual for instructions
on setting backlash. It should ideally be in the .003" to .005" range.) Once the amount is
determined, the backlash is compensated for by setting it into the display unit's memory. To do
so, complete the following steps for each axis:
1.
Turn the handwheel for each axis one full turn. This assures that the software starts the
backlash compensation at the proper initial point.
2.
Hold down the "Power" button for longer than a second until the display changes.
3.
Now you can set in the backlash for each axis by pushing the button for that axis. Each
time the button is depressed, .0005" (or .01 mm on metric units) is added to the reading.
Set in the amount of backlash you measured previously for each axis. Amounts up to
.015" (.50 mm) can be set. (Note: You cannot cycle backwards to a lower amount. If you
go past your desired amount, you must continue pushing the button until the reading
passes .015" (.50 mm) and returns to zero. Then start over.)
4.
Once the backlash for all three axes is set, briefly push the "Power" button again to return
the display to its normal reading. The backlash setting can be checked or changed at any
time by holding the power button until the display changes and resetting the amount.
Once set, backlash settings are held in a special memory chip even if the unit is turned off
and unplugged. They remain until you change them.
Adjusting the Z-axis handwheel screw
