I think anyone's going to need a bit more information to make a useful response.

Like size of machine, speed of operation etc, etc, etc. ■

North,

You are not getting much support for your query.

You already have 20 HP and torque 19,000 in lb. What is the question? What are you trying to calculate.

This is an unusual application. You may need to go back to basics, or try to find a similar application. As I understand it the indexing beam is something like a trolley, or gantry crane, running on camrolls so that it can stop at a precise position.

I would start looking at what are the resistances, friction at bearings, and so on. Some of this information can be found in the Machinery Handbook. The crane manufacturers have a handbook which goes into similar territory for gantry cranes. I have also had to check the drive design of a ship-loader. The basic calculation was given in the gear manufacturers technical handbook. We had to add the effect of windload on the mobile unit from the structural design code. Some mechine design texts also provide basic formulae. ■