Technical explanations
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Overview
Function explanations, limit values and
conditions minimize your risks
Leaktightness (acc. to EN 60529)
EA
+ M
…refers to the leaktightness in terms of protection against accidental contact, protection against the ingress of foreign matter and protection against the ingress of water:
T1
TF
IP 65: Protection against accidental contact, no ingress of dust, protection against the ingress of water jets
IP 66: Same protection as IP 65, but protection against the ingress of powerful water jets
IP 67 (standard at pL): Same protection as IP 66, but protection against the ingress of water from temporary
immersion
IP 68 (optional at pL): Same protection as IP 67, but protection against the ingress of water from permanent
immersion
Geometry and integration
T2
/ T3
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Tilting drift (sd 200)
…refers to the deviation of the perpendicularity between the dividing / indexing axis and the tilting axis over a
specific tilting range. pL always measures three points: -90° (horizontal), -45° and 0° (vertical), always related to
the position of the dividing/indexing axis and on a radius starting from the center of the tilting axis of 200 mm.
3D
precision
Offset values (offset)
…refer to the deviation from any theoretical NOMINAL values in order to ensure easier alignment of the rotary table
on the machine and faster commissioning.
offset 1: [mm]
0.013
RFX/LFX
Pitch error (pe)
…refers to the effective NOMINAL-ACTUAL deviation over a specific rotation angle (“pitch error“) for axis error
compensation on the CNC machine. For rotary tables, this occurs typically with the movement of eccentrically
arranged loads such as clamping yokes, tilting axes etc.
MOT / KAB
WMS / CNC
All accuracy data apply to an unloaded rotary table
pitch-error: [°]
0.005
Workpiece
clamping
Backlash (bl)
…refers to the mechanical and electronic reversal error* (gear unit, angular position measuring system, positioning
control…) for the loose backlash compensation on the CNC machine.
* For definition, see «Gear unit» p. 82
General
accessories
Parameter lists
To minimize commissioning time and make maximum use of the pL rotary table, you can find parameter lists for various
controls at www.lehmann-rotary-tables.com. In the case of load-relevant parameters, we distinguish between...
usual
…refers to the practice-oriented drive values for pL standard spindle loads, which should usually be set (pL recommendation) in order to still provide certain reserves to integrate deviations occurring in practice and to allow an
easier control comparison. Normally, no warm-up is required here.
Technology /
engineering
catalog
…refers to the maximum achievable catalog drive values for pL standard spindle loads, for which more demanding
requirements are imposed both on the commissioning engineer and on the material in order to achieve these values.
Depending on the respective application, they must be reduced (empirically). A warm-up cycle for the gear unit is
frequently recommended here.
max load
…refers to the maximum achievable drive values for J max. and eccentric loading.
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