32
DR300-UN
Troubleshooting
Unit does not turn on
1. Ensure that the power cable is installed properly and the switch on the back of the unit is in the “on” position.
2. Ensure that the power outlet has power and is supplying the proper voltage and current.
3. Ensure the fuse is intact. The fuse compartment is located directly below the power plug and can only be accessed with
the power cable removed. Replace only with a 1.0 amp 250 volt fuse.
Axis display does not change when axis is moved
1. Ensure the encoder cables are plugged into their appropriate inputs.
2. Check the connectors for bent or missing pins.
3. If the problem persists, swap the unresponsive axis input with another axis. Move both axis and check the displays. If
the same display does not change, the DRO may be faulty. If the axis display that you swapped the original encoder to
does not change, the problem is most likely with the encoder. See the encoder manual for further troubleshooting.
Axis display “skips,” change intermittently, or display inaccurate position
Most such issues are caused by encoder misalignment or encoder hardware failure. Be sure to follow your encoder’s in-
stallation instructions carefully to avoid misalignment. See your encoder manual for further troubleshooting and repair or
replacement information.
If an axis display always changes by a constant scale factor of the distance moved (e.g. the display always shows double
the distance traveled), it is possible that the DRO has an incorrect value set for the counts per unit for that axis. Determine
the proper value for your encoder and adjust accordingly. See “Encoder Settings” in the Settings section of this manual for
instructions on changing this value in the DRO.
Some programs, such as Bolt Circle and Taper Measurement, are unavailable
Some programs are specific to the mill or lathe machine type. If the DRO is set to the incorrect machine type, the program
you would like to use may be disabled. We strongly recommend leaving your DRO set to the machine type that it is installed
on. See the “Machine Type” in the Settings section of this manual to learn how to change the machine type.
Warning: Attempting to repair the equipment will void any and all product warranties.
Only qualified factory technicians may perform necessary repairs.
Bolt Circles and other features turn out backwards or mirrored
Ensure the linear encoders are set to the proper directions of travel. See “Encoder Settings” for instructions on reversing the
direction of travel. The directions should be set such that they obey the right hand rule (form a right-handed coordinate
system). Typical this is done so that the positive X axis points right, the positive Y axis points forward, and the positive Z axis
points up, all in relation to the operator