stepgen.03.maxvel is too big for current step timings & position-scale, Clipping

Hallo zusammen,

ich verstehe die Meldung nicht ganz, welche Werte sind im Verhältnis zueinander nicht OK und in welchem Verhältnis muss was zueinander stehen, damit es passt?

stepgen.03.maxvel is too big for current step timings & position-scale, Clipping to Max possible

Mesa: 7i95
Joint 3 = Achse Y
Mikroschritte: 1/2 (1zu1 kann mein Treiber nicht)
Motor: 1.8°
Getriebe: 40 zu 1 (Eingangsumdrehungen 40, Ausgangsumdrehungen 1)

Leider ist die Ausgangsgeschwindigkeit zu niedrig, ich würde eine viel höhere Geschwindigkeit benötigen. Allerdings meckert LinuxCNC bei der Anzeige der Maximaldrehzahl (und Warnungen mag ich nicht).

Daher meine Frage, wie bzw. worauf muss ich bei der Konfiguration von Y (Joint 3) achten?

Im Anhang meine aktuelle INI und HAL.

Gruß Mücke

INI
 
HAL
 
 
 

The warning means that you cannot reach the specified joint
maximum velocity with your current step timings, that, you have

STEPLEN = 2500
STEPSPACE = 2500

This means the total step rate can not be greater the 200 KHz
( 1/(StepSpace+StepLen), but your maximum velocity (7200 mm/s !)
times the scaling (44.444)  requires a 320 KHz

Did you really mean 7.2 meters per second maximum Y Velocity?

7.2 m/s is clearly too high.
The exit velocity is very low.

You are right, I could make the scale smaller, then the output speed should be higher.

I can't understand your calculation
1/(step size + step size) * scaling = KHz
1/(2500+2500)*44.444 = I arrive at 0.008888 ?
How do you arrive at 320 KHz?

7200 (mm/s) * 44.444 steps/mm = 320K steps/s

1/(2500e-9+2500e-9) = 200K maximum step rate (2500 is in nanoseconds)

You don't need to change the scale, just reduce the Y/Joint3 max velocity
so something reasonable (HAL axis units are in seconds, not minutes,
did you mean 7.2 Meters per minute? that is 120 mm/s)

I will print out your calculation example and hang it on my info wall, THANK YOU!

I started with 3600mm/s, and the part turns so slowly, so I just increased the number, the only reason was to make it bigger.

The axle should rotate faster.

Not expedient. I could install a smaller dribble (now 40/1).

mikroschritte 1/2 =400 steps per revolution
reduction 40/1 = 16000 steps per revolution
Your scaling is not OK.
What does the reduction drive?