DLMUK
Member
Hi,
I am looking into a project to build a control system for a hydraulic test machine. Working with hydraulics is not something I have done before with an S7-1200.
My hydraulic test machine will have a load cell in it, capable of reading the load being applied by the hydraulic components. For my control system I would like to be able to stop at pre-defined loads, for example if I program to say 5.00tonnes, I would like to be able to stop my machine to within +/- 0.01tonne.
I think I need to use servo control, however all of the Siemens videos I have watched talk about position control (in mm). Rather than what I would assume I need, which is pressure control.
I have watched this video:
TIA Portal Tutorial #09: Control step- and servomotors with Motion Control
I cannot see how you could sensibly translate position into force, because the test specimen in the machine may vary, physically, but also elongation under load would vary. I expect I need PID control with my load cell as my feedback.
Is anybody able to suggest some reading material for this type of application?
I'm quite set on using Siemens PLCs as I know them, and I don't want to learn a new PLC and application at the same time.
Thanks
I am looking into a project to build a control system for a hydraulic test machine. Working with hydraulics is not something I have done before with an S7-1200.
My hydraulic test machine will have a load cell in it, capable of reading the load being applied by the hydraulic components. For my control system I would like to be able to stop at pre-defined loads, for example if I program to say 5.00tonnes, I would like to be able to stop my machine to within +/- 0.01tonne.
I think I need to use servo control, however all of the Siemens videos I have watched talk about position control (in mm). Rather than what I would assume I need, which is pressure control.
I have watched this video:
TIA Portal Tutorial #09: Control step- and servomotors with Motion Control
I cannot see how you could sensibly translate position into force, because the test specimen in the machine may vary, physically, but also elongation under load would vary. I expect I need PID control with my load cell as my feedback.
Is anybody able to suggest some reading material for this type of application?
I'm quite set on using Siemens PLCs as I know them, and I don't want to learn a new PLC and application at the same time.
Thanks