Festool DOMINO DF 500 Instruction Manual page 22

22
Symptom
Domino tenons are too
loose
Domino tenons are too
tight
Workpiece joints are
misaligned horizontally
Workpiece joints are
misaligned vertically
Tilted or misaligned
mortise slots
Workpiece joint won't
close (gaps between
pieces)
Tearout or rough mor-
tise slots
Tapered mortise slot.
The Domino tenon fi ts
only part way into the
slot
Possible causes and corrections
 Make sure you hold the Domino joiner fi rmly in position while plunging the
mortise slot.
 Make sure the mortise width setting is correct.
 Make sure you are using the correct mortising bit for the size of the Domino
tenon.
 The Domino tenons may have shrunk in an overly dry or warm environment.
This is normal wood movement.
 Check the mortising bit to ensure it is not bent. A bent bit will make a
thicker and wider mortise slot than desired.
 The most common cause for this is that the tenons are stored in a humid
environment, and they have swelled from moisture absorption. Store the
tenons in a cool dry environment.
 The mortising bit may have been improperly sharpened or sharpened too
many times. Replace the bit.
 Make sure the workpiece is securely clamped before plunging.
 Check the Stop latchs.
 Check the calibration of the Horizontal Position Gauge (sight gauge).
 Don't plunge the mortising bit into the work too fast. This may cause the
joiner to move during the plunge.
 Make sure the friction pads on the front of the joiner are not worn, dam-
aged, or missing.
 Take care not to tilt the joiner while plunging.
 If the mortise slots were registered from the bottom of the baseplate, make
sure there is no dust or debris under the joiner.
 Make sure the fence is properly locked at the desired height setting.
 Inspect the height adjustment lock to ensure it is not broken (slipping).
 Make sure the fence is set to the correct angle (e.g. 90 degrees).
 Make sure to hold the Domino joiner fi rmly to the work surface.
 Make sure the proper plunge depth is set.
 Make sure the joiner is tight to the face of the workpiece.
 The mortising bit may have been sharpened too many times and is too
short.
 Excessive dust may be present inside the linear slide.
 Excessive glue may be present at the bottom of the mortise.
 Plunging speed too fast. Slow down the rate of your plunge.
 Low-grade materials and plywoods will tear out more than solid woods.
Decreasing your plunging speed will improve the results but may not
eliminate the problem completely.
 Dull mortising bit.
 The plunge speed is too fast and the bit is not cutting the sides properly.
Slow down the plunge speed.