Created Date: April 27,2019

Created by: MWT Va

Hello, new to forum.

Have done past projects with Click and H2 Do-more, but that was before I was broadsided in a car accident.

I made a few calls to Automation for assistance but sometimes now can't process in that type of situation............anyway..not complaining.....just need to ask for help.

Project is: two lead screws on separate axis connected via a chain driven by ac gearmotor coupled to one shaft. Shafts rotate 480 RPM

I need to monitor the chain driven shaft as both lead screws must turn simultaneously to prevent skewing.

The system is robust enough that I don't expect any drive failure but...........

It was mentioned I could use a timer to do this? So I envisioned a disc(with notch) on the shaft using a U frame photo sensor and trigger that way????

Couldn't figure that out so looked at an encoder to somehow "watch " pulses....... no pulses, drop power to motor,couldn't figure it out either.

So after hours of no progress I stumbled upon this forum looking for help via Google.

Any help would be appreciated.

Created Date: April 27,2019

Created by: RogerR

The sensor looking at the shaft notch option could work if the skewing up to one turn of the shaft is ok.

The sensor inputs X1 on Shaft 1

X1 one shot contact sets coil C1

The sensor inputs X2 on Shaft 2

X2 resets coil C1

If X1 is made and C1 is still set, then Shaft 1 turned a full rotation without Shaft 2.

Created Date: April 27,2019

Created by: Garry

https://accautomation.ca/series/click-plc/

The Click PLC now has high-speed inputs that are programmable. You could use the frequency input for the shaft. If it is not turning you will get and output.

See the link below:

https://accautomation.ca/click-plc-high-speed-counting-part-1/

https://www.youtube.com/watch?v=m0I9P5AoFqE&feature=youtu.be

Hope this helps you out.

Regards,

Garry