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Huvema HU 460 X 1500 VAC Manual

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26
CHANG E S AND T YPI N G ERRORS RESERVED
CHANG E S AND T YPI N G ERRORS RESERVED CHANG E S AND T YPI N G ERRORS RESERVED
14. TroUble shooTinG
TROUBLE PROBABLE CAUSES REMEDY
Overheat of
headstock bearing
1. Oil level in headstock is too
low or too high.
2. Quality and viscosity of oil is wrong
3. Oil is too dirty.
4.Oil hole in bearing obstructed by dirt.
5. Bearing obstructed by dirt.
6. Badly worn bearing.
7.Bearing in its case is not in proper position.
8. Bent or sprung main spindle.
9. Too much end thrust.
Check the oil level and replenish ordischarge
the oil to the proper level.
Replace the oil with recommended one.
Replace oil.
Remove the dirt from the oil hole.
Clean the bearing and renew oil.
Replace bearing.
Dismantle and reassemble it.
Replace main spindle.
Adjust thrust nut.
Oil leakage from
gearbox.
10.Plug of drain not tightly.
11.Headstock cracking,
12.Leakage from overflow headstock cover.
13.Leakage from overflow
spindle bearing house.
Replace sealant tape on threat; replace and
tighten.
Repaired by special welding.
Tighten cover screw or replace gasket.
Replace oil ring.
Excess noise of
vibration of
machine
14.Badly worn bearing.
15.Badly worn gear.
16.Bent or sprung shaft.
17.lose of foundation bolts.
Replace bearing.
Replace gear.
Replace shaft.
Tight foundation bolts.
Chatter 18.Clamp of work piece in from loose status.
19.Spindle bearing thrust too loose.
20.Headstock is not tight with bed way.
21.Excess clearance between carriage and bed
way.
22. Excess clearance in cross or compound
slide.
23.Cutting angle of cutting tool is not correct.
24.Edge of cutting tool has been worn-out.
25.Weak of tool shank and too long for
extension.
26.Tool fixed to holder not tight enough.
27. Unbalance of work piece or chuck when
high speed revolution.
28.Front point of cutting tool not in correct
position.
Tighten clamp.
Adjust bearing thrust.
Tighten headstock screw.
Adjust carriage back clamp.
Adjust taper gib.
Regrind tools to correct cutting angles.
Regrind cutting tool.
Replace with rigid tools or reset the tools.
Tighten tool again.
Balance or reduce spindle speed revolution.
Reset cutting tool.
Bending, when long
work piece cutting
29.Feed valve too large.
30.Workpiece too thin or too long.
Reduce feed valve size.
Use follow rest and adjust position
of tool.
Accuracy of product
fails
31.Accuracy fails in machining. Check the accuracy of correlation between
products and machine (ref. Accuracy chart.)
Uneasy to hold gear
change lever
32.Set spring broken or too weak. Adjust adjusting screw or replace the spring.
Misalignment of
chuck with main
spindle
33.Incorrect position of cam. Adjust cam and lock in proper position.
… 26 …


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