Is MC_GearIn suitable for a gantry system (4-axis synchronization)?

[malek ch]

Hello everyone,

I’m currently working on my final-year industrial project, which involves controlling a gantry system with 4 axes using Siemens TIA Portal (Motion Control).

The system includes two motors driving the same Y-axis (Y1 and Y2), in addition to X and Z axes.
For the Y-axis, I used the MC_GearIn block to synchronize Y2 with Y1 (or a virtual master).

However, I noticed that MC_GearIn only synchronizes position and velocity — it does not compensate for mechanical misalignment (skew) between the two sides of the gantry.

So my questions are:

Is it reliable to use MC_GearIn for a gantry system in an industrial setup?

How can I compensate or correct the skew error between Y1 and Y2?

Should I consider a “Gantry Control” function block or a custom feedback correction loop (position difference feedback)?

Any advice, practical examples, or experience sharing would be really appreciated.

Thank you in advance!
Khalifa C.

[jrw]

Do you have a picture ?

these are independent motors and are not mechanical linked together right?

ie 

with a shaft

[malek ch]

i have 3d picture : 

Yes, the two motors are independent and not mechanically linked together.

[Hati]

Both motors have a encoder feedback? Then it should be no problem to drive them with MC_Gear. That block is made for this kind of gearing.

 

[malek ch]

yes both motors have encoder feedback , thank you very much