This is a simple illustration of how important it is to review the gearing ratio that is between the load and the output shaft of an indexer.
Your machine has a fixed payload. It is
• | a rotary table (driven element), |
• | with an operating stroke of 270° per step, |
• | with a maximum torque of 100 Nm. |
Since an indexer with a Number-of-Stops = 1.333 is not available, you must apply a gearing ratio between the table and indexer. Let us look at two solutions that use two different pulley size ratios:
SOLUTION 1
The index angle of the indexer output element is 180° per step. The Gearing Belt and Pulleys increase the output to 270° per step at the rotary table. The total torque at the indexer output element : 100 Nm × 3 ÷ 2 = 150 Nm |
|||||
SOLUTION 2
The index angle of the indexer is 360° per step. The Gearing Belt and Pulleys reduce the output to 270° per step at the rotary table. The total torque at the indexer output element : 100 Nm × 4 ÷ 3 = 75 Nm |