[Help with parameters for servo motion profile "S-Curve"]

Hi,
It seems like you are doing everything right except for the Jerk value.
It shouldn't be between 1 to 100,it's the same scale as Velocity and acceleration.
I can recommand use a value 10 times greater then the acceleration. (if you need higher response increase it and if you want to to soften the response decrease it) 

[Synchronizing two motors]

3 hours ago, Big Tom said:

Hi.

I am starting with unitronics PLC's and i have to  make at new project  with   two servo working where one is a master and other one slave , Foil is pulled by rollers through machine and salve servo needs to follow master +keep spare amout of foil in hanging loop.

 

Thanks for help.

Hi,
if you are pulling a foil many times only one axis in pulling while the other needs to mantain \ control the tension. 

In that case the "master" pulles according to the requested command (position\velocity) and the 2nd axis just work in torque control (with max velocity limitation)
so it doesn't care about the actual movement.

If you wish to consult and dissscus in details you can contact our tech-support by submiting a ticket:

https://support.unitronics.com/index.php?/ticket/submit-ticket

 

[Synchronizing two motors]

17 hours ago, Dave said:

Yes! I was hoping to find that function block in the current Unilogic motion commands, but didn't see it. Any idea when it will be added?

This?




I can't garentee...probobly two realeses from now.  
But if you don't have the time for that please email me.

David.

[Synchronizing two motors]

On 6/16/2021 at 8:06 PM, Dave said:

How would I go about synchronizing two identical servomotors, driving two identical ball-screw actuators?

Syncronization basically means both axes will make the same travel at the same time.
But just like your mechnical system have it's own tolerance the syncronization has it's own tolerance as well.

1. So for some application just tuning both axes and executing a "Single axis" simultaniusly will do just fine.
2. For others you can use an internal loop withing your control application- set one axis as "Master" and then check for the position diffrance between them,
The diffrance can be used as a factor to a PID function that increases the "Slave" velocity at the position block in order to reduce the lag\lead of the slave comparing to the Master.(Dont forget to allow "Contiues update" bit)
3. You can wait for the MC_GearInPos block that will be introduced soon un UniLogic for Cyclic Ethercat functionallties 

 

 

 

  

[One axis control movement]

On 5/28/2021 at 6:11 PM, Eliran said:

Is there any example/tutorial that learn how to control an AC motor with VFD and encoder, using PLC?

Basiclly you are right, but...
Unitronics is now in the process of imlementing a new VFD product line (UMI-B7)
That VFD support Encoder extention cards and support Close-loop. (Position and Velocity ) including "Standstill" capability. 

If you need more information please contact
Support@unitronics.com  and provide more information about the application. 

 

[AC SERVO CANOPEN COMM / I NEED HELP]

On 10/20/2020 at 10:34 AM, Soner54 said:

nobody helped.
I did it myself eds file.
thanks.

Hi Soner54
As a policy we support our motion solution  (and the servo in particular)  as a part of a unitronics eco-system.
Due to that we do not provide an EDS files for our drives.

Since Unitronics servo drive works according to DS402 standard,  using another file can be an option.
However we can't guarantee it will work flawlessly.

Can you please share more details about the application?