2) Is it possible to check indexing accuracy on any cnc machine with reference X & Y axis?

1 – The precision needs to be checked while the indexer is in dwell for any radial movement with a dial indicator. Dial indicators can be purchased from a variety of sites and can be digital or mechanical.

2 – A globoidal cam needs to be designed from scratch by you in PRO-E. The program has no premade options for you.

3 – Tilting load is the capacity of the bearing to handle an offset load. For example, a large mass is placed on a single side of the rotary table – the tilting moment tells you how much mass the internal bearings can handle before any sort of deflection or reduction in efficiency takes place.

Hope this helps.

Sorry for the late response, hopefully this can answer your questions:

Motion Index Drives uses a modified sin curve for all of its cams (parallel, globoidal and barrel); years of experience and testing have shown us that this is the best cam profile for almost all applications.

NANO technology is only applicable to barrel cams currently. The additional accuracy is reached through a specific system which adjusts the cam during dwell with an encoder and control device.

NANO indexers are primarily utilized in assembly, testing and printing machines. It can be used instead of a Hirth coupling system, but we would have to ensure that the machining forces are not too large because they could damage the unit. The Hirth system can also handle large machining forces, and we can’t exactly compare the two systems.

The loads on the tables I have experience with are a total weight of 4,000# to 35,000#. The index speeds ranged from 3.5 seconds to 6.0 seconds for 90-180 degrees of rotation. The applications I am talking about require an accurracy of +/-.005″ for every table possition being indexed to a single station.

One thing you need to be aware of is the e-stop movement of any turntable or indexer on the market and the travel distance of the machine. These indexes will move large weight very well and at high speeds. They are sized by Moiton to stop as fast as physically possible and designed to hold up under these types of loads.But you have to e-stop them safely.

This is not an issue of the indexer but more an application issue that needs to be understood. It’s affect the placement of light screens, the affect of these distances from the tool and how this will impact operator load times.

The issue is understanding that the farther you get away from the center the farther the machine actually travels from the drop of the brake until motion stops. It is a simple trig function.

For talking puposes lets say the index may only move .5 degrees after the stop engages. The movement of the tooling overhanging the table by 5 feet during this duration is much shorter than if it overhangs 15′. This travel distance is then used in the calculation of OSHA “Safe Press Stopping Distance”. Basically if someone was to trip and fall through the light screen during index, the movement must stop before the person comes in contact with the machine. So the farther the tooling actually moves during this event, the further the light screens neeed to be from the tooling. Thus the longer your load times will be.

This applies to any type of machine but intergrators can forget that something in motion on a pivot caculate different than a linear motion.

I would like to point you to the Project Inquiry form on our website, which you can find at http://motionindexdrives.com/form-new-project-inquiries.php. Once we have received your information the appropriate office will contact you for price and delivery.

Thank You.

How accurate do you need the indexer to be for your silk screen process?

How do you ensure the additional accuracy as claimed.

Can this mechanism be employed for CNC tool turrets coupled with
a hirth coupling .

Pankaj Bir