Dear all
Iam working on a project for continuous vertical filling machine and this a video for my application
https://youtu.be/coQyr06dDK8
My question is
How can I syncronise the speed of drawing belts(driven by VFD) and horizontal jaws (driven by servo) during sealing and cutting
Any tips will be helpful
Thanks in advance
From the video, it looks to me that there are registration marks on the packaging material, detected by an optical sensor.
Could it be as simple as using the optical sensor detecting that registration mark as a trigger for seal-and-cut? And the return of the jaws after the seal-and-cut is a passive device (springs, or weights and air-shocks)?
When the registration mark is past the sensor, that would release the jaws, then a spring or summat similar would open them, and another spring/whatever would return them to the top position, quickly enough that they get to that top position in time to wait for the next registration mark event.
That next registration mark would trigger closing the jaws, sealing and cutting, and the package motion, plus friction, would draw the jaws down (again, against some kind of spring or other malleable resistance device).
Rinse, repeat.
Obviously there might be some empirical work to put the registration marks at the right place on the packaging, and tuning the passive return mechanism. But other than that the process looks repeatable.
[Update: d'Oh; the registration marks' positions could probably be estimated with a tape measure to the nearest inch or so, and then the tuning process adjusts the position of the optical sensor; this requires designing the optical sensor mount to have enough room and to be adjustable]
There are a ton of motion control people here, so you should wait for answers from them.