OPTIMUM
M A S C H I N E N - G E R M A N Y
201
2
Malfunctions
Version 1.0.1 dated 30 / 08 / 2012
Page 53
Original operating instructions
MH28V
GB
7
Malfunctions
7.1
Malfunctions on the drilling-milling machine
Malfunction
Cause/
possible consequences
Solution
The drilling-milling machine
does not start
•
Start sequence not followed.
•
“Switching on the drilling-
milling machine“ on page 26
•
Have it checked by authorised
staff.
Tool "burnt“.
•
Incorrect speed.
•
The chips have not been removed
from the bore hole.
•
Tool blunt.
•
Operating without cooling agent.
•
Select another speed, feed too
high.
•
Retract tool more often
•
Sharpen and replace tool.
•
Use coolant.
Impossible to insert holding
taper into the spindle sleeve.
•
Remove any dirt, grease or oil
from the internal conical surface of
the spindle sleeve or the holding
taper.
•
Clean surfaces well.
Keep surfaces free of grease.
Taper cannot be squeezed
out
•
Optional MT3 taper seat shrinked
on morse cone.
•
Have the machine heat-up at
highest speed for about two minu-
tes and then try again to disas-
semble the taper.
Motor does not start
•
Defective fuse
•
Have it checked by authorised
staff.
Working spindle rattling on
rough workpiece surface
•
Climb milling machining not pos-
sible under the current operating
conditions.
•
Clamping lever of the movement
axes not tightened.
•
Loose collet chuck, loose drill
chuck, loose draw-in rod.
•
Tool blunt.
•
Workpiece is not fixed.
•
Excessive slack in bearing.
•
Working spindle goes up and
down.
•
Perform conventional milling.
•
Tighten clamping lever
•
Check, retighten.
•
Sharpen or replace tool
•
Secure the workpiece properly.
•
Readjust bearing slack or replace
bearing.
•
Readjust bearing slack or replace
bearing.
Fine feed of spindle sleeve
does not work
•
Fine feed is not correctly activated
•
Clutch of the fine feed does not
engage, is dirty, smeared, worn or
defective
•
“Manual spindle sleeve feed
with the fine feed“ on page 31
•
Clean, replace
