ZIMM Screw Jack
7 Operation
and maintenance
2015-01
Version 1.2
31
7.3
Troubleshooting
If faults are evident, these should be localised according to specific
criteria, and rectified by application of appropriate actions. The following
table offers start points as assistance for troubleshooting.
Fault
Possible cause
Action
Spindle squeaking
or vibrating
incorrect spindle grease,
Stick slip
Use a different grease:
– with a high-viscosity base oil
– with additives
– maybe containing solid lubricants
ZIMM will be pleased to give advice.
Geometry errors in the
system
Check the alignment:
– Parallelism of the spindles to each other
– Parallelism of the spindles to the guides
– angular alignment of the mating faces
(gearbox, nut, flange, etc.)
Long slender spindle
Where possible, provide additional supports or
bearings for the spindle.
Reinforce the design.
Temperature of the
spindle too high (>
approx. 90 °C)
1. Check the operating parameters.
2. Reduce the duty cycle or load.
ZIMM will be pleased to give advice.
Resonant spindle
frequency
Change the speed: faster or slower (within the
limit values).
Excessive load
Reduce the load during the running-in phase.
Vibrations transferred from
the system
Install plastic or rubber pads under the travelling
nut (for the R version).
High wear on the
trapezoidal screw
The spindle is dirty
1. Clean the spindle and regrease it.
2. Shorten the greasing intervals.
Wrong spindle grease
1. Check the spindle grease,
ZIMM will be pleased to give advice (load, speed,
etc.).
2. If necessary clean the spindle and regrease it.
Lack of grease
1. If necessary clean the spindle and regrease it.
2. Shorten the greasing intervals.
