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Installation manual
CNC 8055
CNC 8055i
6.
MACHINE PARAMETERS
SOFT: V02.2X
General machine parameters
ACTBAKAN (P145)
It is related to axis parameters BAKANOUT (P29) and BAKTIME (P30), additional analog command
pulse to recover the possible leadscrew backlash when reversing the movement.
This parameter has 16 bits counted from right to left.
Each bit has a function or work mode associated with it. By default, all the bits will be assigned the
value of ·0·. Assigning the value of ·1· activates the corresponding function.
Bit 0. Exponential backlash peak.
The additional command pulse used to make up for the possible leadscrew backlash in movement
reversals may be rectangular or exponential. This bit indicates whether it applies a rectangular
backlash peak (bit=0) or an exponential backlash peak (bit=1).
If the duration of the rectangular pulse is adjusted for low speed, it may be too high for high speed
or not enough for low speed when adjusted for high speed. In this cases, it is recommended to use
the exponential type that applies a strong pulse at the beginning and decreases in time.
Bit 1. Eliminate inside backlash peaks when changing quadrants.
This bit indicates whether the inside backlash peaks are eliminated (bit=1) or not (bit=0) when the
axis changes its moving direction.
In these conditions, the CNC eliminates the additional command peak in the second position loop
after detecting that the moving direction has changed. If the internal peaks are not eliminated, adjust
the leadscrew backlash compensation better.
A fine adjustment of the leadscrew backlash consists in testing the circle geometry and watch for
internal peaks when changing quadrants (left figure).
Bit 13. Additional pulse only in circular paths G2/G3.
This bit indicates whether the additional pulse of velocity command is applied only on circular paths
G2/G3 (bit=1) or in any other type of movement (bit=0).
Bit Meaning Bit Meaning
0 Exponential backlash peak. 8
1 Minimizes the inside backlash peaks
when changing quadrants.
9
2 10
3 11
4 12
5 13 Apply the additional pulse with G2 / G3
6 14
7 15
Default value in all the bits: 0
bit
15
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
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