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NOTE

l Forpumpswhichonlyoperatewithapositivespeed(onlyone

directionofrotation)andswitchthedirectionofactionofthe

cylinderviaadirectionalvalve,oneofthetwocylindersurfaces

mustbespecifiedasnegative(Image7.64:“Cylinder

configuration”screen).Ifthepumpcanbeoperatedinboth

directionsofrotation,thisisnotnecessary.

Since in ServoOne all encoder input variables are calculated in revolutions, the

hydraulics require a relationship between linear and rotary motion for the internal

calculations of the cylinder model, cylinder speed and feed-forward control

variables. For this purpose, the encoder resolution Sx of the linear encoder in µm

per encoder revolution must be known (Para 2852.7unit_scale). In this case, one

encoder revolution is the singleturn range of the respective position sensor for the

cylinder position. This corresponds to 32768 µm/rev for a 16 bit linear encoder with a

resolution of 0.5 µm per increment.

If the current position of the cylinder is transferred via the bus interface (P2298

ComAngle32), the single and multiturn range is set to 16 bits each. This corresponds

to 65536 µm/rev.

ID Index Name Unit Description

2852  HYD_SpdCon  Speedcontrolparameters

2852 0 cylArea1 cm^2 Cylinderarea

2852 1 Ife_K_scale  LeakageFlowEstimator:Gainscaling

2852 2 cylArea2 cm^2 Cylinderarea(option2,useneg.valueforneg.

direction)

2852 3 Ife_K_scale2  LeakageFlowEstimator:Gainscaling(option2)

2852 4 res  Reserved

2852 5 res  Reserved

2852 6 res  Reserved

2852 7 unit_scale um/rev Hydraulicphysicalunitscaling

Table 7.57: Parameters – Pressure control parameters

ID No.: 0842.26B.5-01Date: 09.2020

ServoOne- Device Help

191

7 Control

ID Index Name Unit Description

2852 8 Kp 1/min Speedcontrolgain

2852 9 Tn ms Speedcontrolintegrationtimeconstant

2852 10 KpScale % Speedcontrolgainscaling

2852 11 KpScale2 % Speedcontrolgainscaling(option2)

Table 7.57: Parameters – Pressure control parameters (continue)

Keba ServoOne User Manual

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