User-defined scaling

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User-defined scaling

No wizard is available for user-defined scaling. The following schematic is provided an an aid to parameter setting. Calculation of the factors for position, speed and acceleration is dependent on the selected user unit and the feed constant or gear ratio.

Bild: Schematic of user-defined scaling

Parameters

P. no.	Parameter name	Function	Default Rotary system
P 0270	MPRO_FG_PosNom	Increments per revolution	1048576 [incr/rev]
P 0271	MPRO_FG_Nom	Numerator	1[rev]
P 0272	MPRO_FG_Den	Denominator	360° [POS]
P 0273	MPRO_FG_Reverse	Reverse direction	False = clockwise
P 0274	MPRO_FG_SpeedFac	Speed factor	1[rpm]
P 0275	MPRO_FG_AccFac	Acceleration factor	1/60 = 0.01667 [rpm/s]
P 0284	MPRO_FG_PosUnit	Unit for position value	mdegree
P 0287	MPRO_FG_SpeetUnit	Unit for speed value	rev/min
P 0290	MPRO_FG_AccUnit	Unit for acceleration value	rev/min/s

Tabelle: Parameters for user-defined scaling (rotary system)

Example of scaling of a rotary motor:

Presetting: 1 motor revolution corresponds to 360° or 1048576 increments

Speed in [rpm]
Acceleration in [rpm/s]
Positioning in [°degrees]

Given:

Position unit P 0284 MPRO_FG_PosUnit = [µm]

Speed unit P 0287 MPRO_FG_SpeedUnit = [m/s]

Acceleration unit P 0290 MPRO_FG_AccUnit = [m/s2]

Feed constant: 0.1 mm = 1 rev

Gearing: 1 drive revolution = 3 motor revs

Parameter setting

P 0284 MPRO_FG_PosUnit = 1 µm = 1/1000 mm = 10/1000 rev (output) = 30/1000 rev (motor)

P 0271 MPRO_FG_Nom = 3

P 0272 MPRO_FG_Den = 100

P 0287 MPRO_FG_SpeedUnit = 1 m/s = 1000 mm/s = 10 000 rev/s (output) = 30 000 rev/s (motor)*60 (min) = 1 800 000 rev/min

P 0275 MPRO_FG_SpeedFac = 1 800 000

P 0290 MPRO_FG_AccUnit = 1 m/s2 = 1000 mm/s = 10 000 rev/s (output) = 30 000 rev/s2 (motor)*60 (min) = 1 800 000 rev/min

Example of scaling of a linear motor

Presetting: One revolution corresponds to 32 mm pitch

Travel in [µm]
Speed in [mm/sec]
Acceleration in [mm/s²]

Parameter setting:

P. no.	Parameter name	Function	Default Rotary system
P 0270	MPRO_FG_PosNom	Increments per revolution	1048576 [incr/rev]
P 0271	MPRO_FG_Nom	Numerator	1[rev]
P 0272	MPRO_FG_Den	Denominator	32000 µm
P 0273	MPRO_FG_Reverse	Reverse direction	False = clockwise
P 0274	MPRO_FG_SpeedFac	Speed factor	1.875 rps corresponds to 1 mm/s, 1/32 mm = 0.03125 rps² 0.03125 rps²*60 s = 1.875 rps
P 0275	MPRO_FG_AccFac	Acceleration factor	1/32 mm = 0.03125 rps² corresponding to 1mm/s²

Tabelle: Parameters for user-defined scaling (linear system)

Siehe \"Scaling / Units"\