motor dimensioning for swivel table

[psx2]

Hello everyone,
I trust in your help because I arrived at the last beach!

I have a diameter board of 1.5 meters with a weight of 350 kg, the table rests on small pieces so the performance is great.
above this table I can place 6 pieces equidistant and the center of these pieces is from the center of the table 710 cm.
the table must turn at a speed of 5 mins with a acc and dec of 2 seconds, for the transmission I would have thought to a gear motor and with pinion and crown.
now considering for es a 800 minute gear motor with a reduction ratio i equal to 7 I would output 114,28 rpm
to get my 5 rpm I should have a ratio between the pinion crown equal to 22.8.
the problem is that I have no idea the engine power to use!!
I have tried to search for san google but there are formulas that to me (not being of the sector) are impossible to understand.
Can you clarify my ideas?
Thank you.

ps: forget, the load could be unbalanced in the sense that I could only charge 2 pieces instead of all 6.

Thank you.

 

[cacciatorino]

Hello everyone,
I trust in your help because I arrived at the last beach!
.

what positioning accuracy do you need? Consider that a small corner game in the gear translates into a big linear error on the periphery, and the same goes for the stop inaccuracies of your engine.

Typically for these applications, rotary boards are already built. if you turn to a producer like bettinelli, colombo&filippetti, autorotor (or another of the thousand that are on the market) they think to make the dimensioning.

 

[psx2]

Hello hunter,
thanks to the information but the beautiful and ready products are too expensive so I have to try to arrange.
As for precision I would like to stay around +- 0.5mm in the maximum circumference, but controlling the motor through inverter + encoder I think it's an indebtable thing.

 

[cacciatorino]

As for precision I would like to stay around +- 0.5mm in the maximum circumference, but controlling the motor through inverter + encoder I think it's an indebtable thing.

Watch the game of gear! :finger: if you just want to make the car as you say, better predict a hammer that will focus the table in the stop.

 

[MauroM]

need some extra data:
- how much the only table weighs
- how much they weigh the pieces that go above us
- What is the max diameter of the crown you can do?

 

[psx2]

hello maurom and thanks for the interest,
then I try to be more detailed.
the full load table should weigh around 350 kg
6 pieces can be loaded with a maximum weight of 50 kg each for a total of 300kg plus 50/100 kg which would be the weight of the table for a total of 350/400 kg.
the table has a diameter of 1.5 meters and the intersection between the center of the table and the center of the piece is 710 cm
the pieces are arranged equally (one every 60° )
Of course there is the possibility that the table does not work full load (so maybe 2 pieces loaded and 4 live stations ) but I believe that this does not interest in the calculation,
I think I said everything.
Thank you all.

 

[MauroM]

it would miss the feasible max diameter of the crown, (the larger it is better).

 

[psx2]

opss... .
Sorry, I saw that up to 900 mm in diameter is a measure that many have to catalog therefore of easy availability,
of course the smaller and less expensive ( but on the contrary there is a need for a larger engine )

Thank you.