Hi Ya’akov, If I understand the way the mechanism works there is no need to reverse the motor. This is my understamding. There is a wooden disk with a semicircular cut out. When the cutout is at the top of it's travel it fills with feed from the hopper. To dispence food it rotates and whem the cutout in the disk reaches the bottom position the food drop into a dish. I think the TS initially planed for it to reverse back to the upper position. It is simpler to let it continue it's rotation past the lower position and stop again at the top. He then just needs a disk on the motor shaft with a notch or bump on it to open the micro switch when the cut out is at the top position.
I use a similar system for an automatic hedgehog feeder. The difference is that this uses an auger type feed and uses a slotted opto sensor to sense the motor rotation. When power is applied it rotates a number of half revolutions which can be adjusted by a DIP switch setting. It then stops until it sees power being re applied.

Les.

Les.

Yes, that’s a refinement. Since it will function without the reversing. I was mostly trying to get the TS thinking systematically about the requirements. Applying this idea a level up, to the mechanical results, should have also derived that refinement.

Thanks for pointing it out.

 

Thank you. I think l ll try this one because its easier. Actually l dont quite understand how to connect the relay because l think there are 4 pins and also how to connect the limit switch because l dont understand in the circuit if its one or two. And finally can l make the same one using 220 V Ac ?

First you will need to get a 3 volt DC relay and yes it can be modified for 220 vac

 

Hi Ya’akov, If I understand the way the mechanism works there is no need to reverse the motor. This is my understamding. There is a wooden disk with a semicircular cut out. When the cutout is at the top of it's travel it fills with feed from the hopper. To dispence food it rotates and whem the cutout in the disk reaches the bottom position the food drop into a dish. I think the TS initially planed for it to reverse back to the upper position. It is simpler to let it continue it's rotation past the lower position and stop again at the top. He then just needs a disk on the motor shaft with a notch or bump on it to open the micro switch when the cut out is at the top position.
I use a similar system for an automatic hedgehog feeder. The difference is that this uses an auger type feed and uses a slotted opto sensor to sense the motor rotation. When power is applied it rotates a number of half revolutions which can be adjusted by a DIP switch setting. It then stops until it sees power being re applied.

Les.

Les.

Thats exactly what l am trying to do. You understand it perfectly. Tomorrow l will go and buy the components and maybe make a few tests. If l have any issue l ll ask for help again.

Thanks