Huvema HU 30 DM Mode D'emploi page 21

15. Tapping equipment
The 400V-version of this machine can (at additional costs) be equipped with an electric switch for tapping
operation clockwise or counter clockwise, and the working depth can also be adjusted by the limit switch.
16. Specification of T-slot
The size of the S-slot can be seen in figure E.
17. Troubleshooting
Problem
No running after switch on
Motor overheat and no power
The temperature of spindle
bearing is too hot
Lack of power with main spindle
revolving
Table travel not balanced
Shake of spindle and roughness
of working surface has taken
place during performance
Micro feed does not work
smoothly
Without accuracy in performance
Possible cause
Main switch interruption
Break down of fuse in switch box Replace with new one
In case of too much current, the
overload relay jumps away
automatically
Overload
Spoiled contact point of magnetic
switch
Breakdown of overload relay
Motor is poor
Breakdown or fuse or poor
contact with wire
Tension of pulley V-belt too tight
Grease is insufficient
Spindle bearing fixed too tight
High speed turning for long time
Tension of the V-belt too loose
Motor has burned out
Fuse has burned out
Gap of spindle taper is too wide
Loosening of leaf bolt
Feed too deep
Gap of spindle bearing too wide
Spindle loosening up and down
Gap of taper sliding plate too
wide
Loosening of chuck
Cutter is dull
Work piece is not hold properly
Loosening of clutch
Worm and worm shaft worn out
Loosening of hand wheel fixed
screw
Imbalance of heavy work piece
Often use of hammer to strike
work piece
Inaccurate horizontal table
-20-
Solution
Adjust input voltage and draw back the main switch
Reset the overload relay
Decrease the load of feed
Replace with new one
Replace with new one
Replace with new on.
Switch off power source at once and replace fuse
with new one
Adjust the tension of the V-belt
Fill the grease
Turn with no speed and feel the tightness with hand
Decrease feed
Adjust for proper tension of V-belt
Replace with new one
Replace with new one
Adjust the bolt
Turn and fasten in place
Decrease depth of feed
Adjust the gap or replace the bearing
Put the two of inner bearing covers on the top closer
to each other. Do not over tighten them; it is all right
as long as there is no gap between them
Adjust the tension of the bolt
Fasten chuck
Resharpen or replace it
Be sure to tighten work piece
Be sure to tighten it
Replace with new one
Be sure to tighten it
Tighten the work place firmly and properly
Never use a hammer to strike the work piece
Check and maintain table for keeping accurate
horizontal after a period of use