### Roller compactor: Determining the nip angle and powder ...

By comparing the nip angle range determined by the new method with the nip angle calculated by Johanson's theory it can be seen that Johanson's nip angle is approximately the same as the nip angle at a roller speed of 4 rpm, However at 3 and 5 rpm the nip angle deviates from 21°, and at higher speeds of 6 and 7 rpm this deviation is even greater.

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