control additional axis with smc_interpolator

2021-06-04T09:08:54.506000Z

Thank you! This help me too.

control additional axis with smc_interpolator

2020-02-27T18:30:04.770000Z

The post is kinda old ... but I think it deserves to have a solution here that might be useful for someone.

If you look at the output [piSetPosition] of the [SMC_Interpolator] block you will see that it is a structure that contains the position of the axes (dX, dY, dZ ...), so just create a block to pull the values out and then point them to each [SMC_ControlAxisByPos], such as SMC_TRAFO_ blocks does.

For example:

FUNCTION_BLOCK myCNCPositionConverter
VAR_INPUT
END_VAR
VAR_INPUT
   bExecute : BOOL;
   piSetPosition : SMC_POSINFO;
END_VAR
VAR_OUTPUT
   iFrameNo : INT; 
   dX : LREAL;
   dY : LREAL;
   dZ : LREAL;
   dA : LREAL;
   dB : LREAL;
   dC : LREAL;
   dP : LREAL;
   dQ : LREAL;
   dU : LREAL;
   dV : LREAL;
   dW : LREAL;
END_VAR
IF bExecute THEN
   dX := piSetPosition.dX;
   dY := piSetPosition.dY;
   dZ := piSetPosition.dZ;
   dA := piSetPosition.dA;
   dB := piSetPosition.dB;
   dC := piSetPosition.dC;
   dP := piSetPosition.dA1;
   dQ := piSetPosition.dA2;
   dU := piSetPosition.dA3;
   dV := piSetPosition.dA4;
   dW := piSetPosition.dA5;
   iFrameNo := piSetPosition.iFrameNo;   
END_IF

Another thing to note is that the auxiliary axes (A, B, C, P, Q, U, V and W) have unique speed and ramp settings, ie using the F20 command on one line of G code will specify the speed X, Y and Z axes only (with CNC in 3D mode). For example, to set the speed for the P axis, you have to use "FP20":

G01 P100 F20 E30 E-30 >> That won't work for P Axis!
G01 P100 FP20 EP30 EP-30 >> That works!

You will find more information here:
https://help.codesys.com/webapp/_sm_cnc_din66025_basics;product=codesys_softmotion;version=4.6.0.0

Also note that you cannot use the A, B, and C (Rotary) axes together with the U, V, and W (Linear) axes.
https://help.codesys.com/webapp/_sm_cnc_din66025_additional_axis;product=codesys_softmotion;version=4.6.0.0

The documentation really is a bit complicated, and this is based on the tests I did, maybe someone has another way of doing it or other opinion...

control additional axis with smc_interpolator

2020-02-27T18:30:01.521000Z

Didn"t find any info in online help about additional axis! (only how to use in g-code, but not how to connect to smc_interpolator ).
Did I miss relevant info/pages in online help?

tried some options and used Q-axis in G-code and found out that you have to use dA2 variable from smc _ Interpolator to connect to smc_ControlAxisByPosition

The axis controled in this way does not finish a task! .
If I use for example Q25 and next step Q0 it will start but not finish the first task, but right away steps to next line .
I can solve it with G4 T.. (time delay )

Do I something wrong here or does it work this way. Did I forget to connect a feedback?

control additional axis with smc_interpolator

2020-02-27T18:30:00.386000Z

Hi,
check the online help,
depending on what you Need uvw or a,d,c axis..

BR
Edwin

control additional axis with smc_interpolator

2020-02-27T18:29:57.203000Z

Question

I have an xyz 3axis system .
How do I connect an additional Q-axis to smc_interpolator so it is also controlled bij cnc (g code)?

The xyz you connect to the SMC_interpollator Pisetposition output with Trafo_gantry 3 function blok .
How do I connect/control the additional Q-axis ? ( to smc AxisConytrolByPos in CFC programming ?)

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