[deadlykitten]

hello, besides using G04 F after a change in rpm, is there another method to ensure that programed rpm has been reached ?

far as i remember, confirmation occurs on 10%, but i can not find any infos on this

so please, how to achieve spindle droop control ? kindly

[Algirdas]

according Okuma philosophy the sequesnce is as follow:
1. Feedrate is waiting for commanded rpm.
2. physically rpm is reached remaining 10%.
3. encoder is detecting and transfering to CPU.
4. Processing on the CPU.
5. Command su start cutting feedrate issued.
6. Signal transfered and processed.
7. Drive received the signals and starts the move of the axis.
8. Axes movement started.
9. countour touchec by the tool tip.
The time from 3 to 9 is more than enough to reach remaining 10% commanded rpm. So the "remaining tolerance" is set in the software and inaccessible by variable.

[deadlykitten]

hello i managed to get the chart of time vs rpm, with more than enough accuracy

pls check attached :
... green M41, blue M42
... dotted line is acceleration
... simple line is break

i was after it, for a threading like operation, with a speed near z axis limit, as to eliminate one of the process variables, without using a too big delay, like G04 F=more_time_than_actually_needed

thus i was after "only the necesary delay", and nothing more

such times can not be controlled via parameter, as they are spindle servo data dependant : smaller chuck, bigger part, inertia, etc / kindly