POWER

Enter LM LOAD DATA
	Loads F_x ------ N lb F_x- external linear force (thrust) F_y------- N lb F_z ------ N lb M_x------ Nm in-lb M_y------ Nm in-lb M_z------ Nm in-lb
Enter MOTION PROFILE DATA
Trapezoidal profile - Enter s_a, s_c, s_d, t_c \| v_c, t_a, t_d - is calculated
Triangular profile - Enter s_a, s_d, t_a, \| v_c= v_peak and t_d- is calculated
Subscripts : a - acceleration, d -deceleration, c -constant speed, t_o-idle time between cycles	Distance s_a ------ m in s_c ------ m in s_d ------ m in Velocity v_c ----- m/s in/s Time t_a------ sec t_c------ sec t_d------ sec t_o------ sec

	Inclination angle ------ degrees

Suggested / possible LM3 combinations
Suitable Single LM3 combinations	Single LM3 with idler; or double driven LM3
1 ) - LM3 with carriage N 2 ) - LM3 with carriage L 3 ) - LM3 with carriage X	4 ) - LM3 with carriage N 5 ) - LM3 with carriage L 6 ) - LM3 with carriage X
Select one from the above suggestions 1) 2) 3) 4) 5) 6)

Enter max tolerable profile deflection	mm in
Enter overall travel (LM profile) length	m in

rpm, accel-, decel-rate, torque, inertia ..... at the Pulley Axis
Pulley rpm at vc	rpm
Pulley accel. rate	radian / sec²
Pulley decel. rate	radian / sec²

Accel. torque requirement	Nm lb-in
Decel. torque requirement	Nm lb-in
Non-dynamic torque required at the pulley (to overcome friction and gravity and the external linear force)	Nm lb-in
Overall peak torque requirement Tp with 95% system efficiency	Nm lb-in
Belt Force Fx corresponding to Tp	N lb

Overall Inertia at the pulley axis	kgcm² lbin²

Max profile support span	mm in



Enter Motor-Rotor inertia	kgcm² lbin²
Ideal gear ratio (for 1:1 inertial match )

Enter selected gear ratio

rpm, accel-, dcel-rate, torque, inertia ..... at the Motor Axis
Motor rpm a vc (vpeak)	rpm
Motor accel rate	radians / sec²
Motor decel rate	radians / sec²

Motor accel. torque requirement	Nm lb-in
Motor decel. torque requirement	Nm lb-in
Non-dynamic motor torque requirement (to overcome friction and gravity)	Nm lb-in
Overall motor peak torque requirement	Nm lb-in
Motor RMS torque requirement	Nm lb-in
Actual inertia match ratio

Suggested / possible LM4 combinations
Suitable Single LM4 combinations	Single LM4 with idler; or double driven LM4
1 ) - LM4 with carriage N 2 ) - LM4 with carriage L 3 ) - LM4 with carriage X	4 ) - LM4 with carriage N 5 ) - LM4 with carriage L 6 ) - LM4 with carriage X
Select one from the above suggestions 1) 2) 3) 4) 5) 6)

Enter max tolerable profile deflection	mm in
Enter overall travel length	m in

rpm, accel-, decel-rate, torque, inertia ..... at the Pulley Axis
Pulley rpm at vc	rpm
Pulley accel. rate	radian / sec²
Pulley decel. rate	radian / sec²

Accel. torque requirement	Nm lb-in
Decel. torque requirement	Nm lb-in
Non-dynamic torque required at the pulley (to overcome friction and gravity and the external linear force)	Nm lb-in
Overall peak torque requirement Tp with 95% system efficiency	Nm lb-in
Belt Force Fx corresponding to Tp	N lb

Overall Inertia at the pulley axis	kgcm² lbin²

Max profile support span	mm in



Enter Motor-Rotor inertia	kgcm² lbin²
Ideal gear ratio (for 1:1 inertial match )

Enter selected gear ratio

rpm, accel-, dcel-rate, torque, inertia ..... at the Motor Axis
Motor rpm a vc (vpeak)	rpm
Motor accel rate	radians / sec²
Motor decel rate	radians / sec²

Motor accel. torque requirement	Nm lb-in
Motor decel. torque requirement	Nm lb-in
Non-dynamic motor torque requirement (to overcome friction and gravity)	Nm lb-in
Overall motor peak torque requirement	Nm lb-in
Motor RMS torque requirement	Nm lb-in
Actual inertia match ratio

RACO LM - Linear Drive sizing / selection utility

By clicking the Data Input-, LM3- or LM4- radio button you will access (make visible) the individual calculation forms.
Enter load and motion profile values in the Data Input form and trigger the calculation.
The appropriate fields in all forms will be filled with calculated data.
Make visible the LM3 or LM4 form.
Make appropriate selections, trigger the next calculations, input some motor data, trigger the next calculation, or go back and change some inputs, re-trigger the calculation ....continue to optimize your sizing / selection.

Note / Disclaimer: The user is solely responsible for the correct interpretation of the results.
We made the best effort to avoid any mistakes in this online PT & Drive engineering calculation utility. RACO International is not liable for any mistakes or damages resulting from the use of this utility.


Data Input		LM 3		LM 4		Unit Conversions