Previous thread on setting up a timer to run a motor for a given number of seconds.

https://talk.newagtalk.com/forums/thread-view.asp?tid=970994

I got my slightly used electric motor unit for calibrating insecticide boxes and for general planter lubrication. Big thanks to Rothwell Ag Products for the nice packaging in a small cardboard drum.

I had inquired about finding a timer to set to run the motor for the given number of seconds needed to equate to driven distance at a given speed.

I found this little device on Amazon.

https://www.amazon.com/gp/product/B075GSGH85

PDF of the instructions that go through the various settings and time functions.

https://photos.imageevent.com/vprb/plantercalibrationmotortimer/Timer%20function.pdf

There is also some good info and a couple drawings in the Amazon comments that are helpful as well.

I configured this so when it is powered on it will wait so many seconds then kick the motor on and run for the designated time then shut off. Its says rated for 10 amps and so far seems to work exactly as I had planned. Just be sure to select the correct timer from Amazon if wanting to use on AC or DC voltages.

This is after the cycle has ran with 0 showing on each counter. Hitting power button starts the counter/cycle again.

In this picture the time delay has ran to 0 and the run feature has 8 seconds remaining.The small red "out" light is illuminated showing it running the output. The green LED is just something I had that also illuminates when the motor is running.

I plan to leave the cord on the motor as is. Plug into a regular outlet and operate it with existing switches which will allow continuous running for planter chain oiling and observation etc.

I will probably build all this into a small project box that will also have a outlet controlled by the timer. When I want to run in calibration mode. I will plug the box into a regular outlet then the motor into the timer controlled outlet.

Might even add a indicator LED and buzzer just for fun.

Thought others might have interest in such a device and you could probably use the output to activate a relay for heavier switched loads.

Couple videos of it working for those who are interested.

These videos show a 4 second delay then running for 12 seconds and shutting off.  Shortened sequence in the interest of video run time.

https://photos.imageevent.com/vprb/plantercalibrationmotortimer/20210123_224436.mp4

https://photos.imageevent.com/vprb/plantercalibrationmotortimer/20210123_221228.mp4

If for some reason the videos don't play they can be found along with the pictures in this album

https://imageevent.com/vprb/plantercalibrationmotortimer

Hope this info is helpful for others.