Lenze EVS93xx FlyingSaw - Manual (Page 29)

FlyingSaw
Features of the Prepared Solution
Prepared Solution Servo PLC / ECSxA 1.1 EN page 2-16
Machine parameters
The machine parameters define the relationship between the application measuring system and
the incremental measuring system (internal measuring system in the controller). The following
variables define the relationship between one motor revolution and a feed motion in the
application measuring system:
• Feed constant: this defines by how many application units the load moves when the drive
makes one complete revolution on the output side of the gearbox. This constant is generally
given in [units/rev].
Example: on a spindle drive the feed constant is the same as the pitch on the spindle,
scaled in [mm/revolution].
• Gearbox ratio, divided into numerator and denominator term: both the numerator and
denominator term are generally given as integers (corresponding to the number of teeth on
the gearbox stages).
• Resolution of one motor revolution: the ServoPLC internally resolves one motor revolution
into 65536 (=2 16 ) steps.
The conversion between the two measuring systems can be carried out with the knowledge of
these mechanical machine constants using the following formulae:
a) Conversion from application units [units] to incremental units [incr.]:
] / [
] / . [ 65536
] [ .] [
nt FeedConsta
rev units m
rev incr
N
Z
units incr
i
i
⋅ ⋅ =
b) Conversion from incremental units [incr.] to application units [units]:
] / . [ 65536
] / [
.] [ ] [ nt FeedConsta
rev incr
rev units m
Z
N
incr units
i
i
⋅ ⋅ =
With Z
i
= Gearbox ratio numerator
N
i
= Gearbox ratio denominator
m
FeedConstant
= Feed constant
As part of the "FlyingSaw" Prepared Solution, the mechanical machine constants are entered
using codes.