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Datasheet

Rack and Pinion Datasheet

Rack and Pinion datasheet contains information on the typical and suggested applications, technical specifications, and assembly steps of the Vention Rack and Pinion Actuator.

Rack and Pinion Datasheet main image.

Contents


Overview

The assembly of the rack and pinion consists of installation of the rack segments into the extruded aluminum T-slot and the pinion housing assembly mounted on linear bearings or rollers. The pinion housing assembly (MO-LM-019-0001) allows for any combination of Vention's NEMA 34 stepper motors and/or Vention's 5:1 gearbox to drive the actuator. With the 40:1 force to torque ratio of the rack and pinion and any combination of powertrain parts, multiple levels of force can be achieved. The housing also features mounting holes that interface perfectly with extruded aluminum T-slots, assembly plates, or gantries. End stops allow for installation of any Vention M18 sensors and also mount directly to the rack. Finally, two rack segment lengths are avaliable and can be used in combination to create your desired rack length.



Applications

There are several applications for rack and pinion systems. One ideal use is in z-axis applications for lifting heavier loads at a fast pace, such as a Vention 3 or 4 axis palletizer's z-axis. Another application where a rack and pinion system excels in long range extenders such as a cobot range extender.


Technical Specifications


Powertrain Combinations

Max Force - Motor with Rack and Pinion [N] Max Force - Motor and Gearbox with Rack and Pinion [N]
MO-SM-001-0001 390 1000
(Actuator Limited)
MO-SM-002-0001 200 990
MO-SM-003-0001 110 540

Force versus Speed


rack and pinion outpout force versus speed

Exhibit 1. MO-SM-001-0001 with Rack and Pinion




rack and pinion gearbox output force versus speed

Exhibit 2. MO-SM-001-0001 with Rack and Pinion & 5:1 Gearbox




rack and pinion output force versus speed mo-sm-002-0001

Exhibit 3. MO-SM-002-0001 with Rack and Pinion




rack and pinion gearbox output force versus speed mo-sm-002-0001

Exhibit 4. MO-SM-002-0001 with Rack and Pinion & 5:1 Gearbox




rack and pinion output force versus speed mo-sm-003-0001

Exhibit 5. MO-SM-003-0001 with Rack and Pinion




rack and pinion gearbox output force versus speed mo-sm-003-0001

Exhibit 6. MO-SM-003-00001 with Rack and Pinion & 5:1 Gearbox



Specifications

Maximum Speed (mm/s) 3000 (without gearbox)

1563 (with gearbox)
Axial Load Capacity (N) 1000
Displacement Ratio (mm/turn) 157.08
Linear Force / Torque Ratio (N/Nm) 40
Repeatability (mm) 0.025
Linear Backlash (mm) 0.25
Motor Compatibility NEMA 34, 14mm shaft

MO-SM-001-0001, MO-SM-002-0001, MO-SM-003-0001

Assembly Instructions

  1. Slide the rack segments into the aluminum extrusion T-slots as shown.
  2. Install the end stop to the first segment using the included specialty T-Nut to properly support the end of the rack segment. Make sure that the specialty T-nut and rack end are butted up together before tightening the end stop fasteners.
  3. Secure the other end of the rack segment using the included set screw to jam the segment in place.


  4. rack and pinion assembly steps

  5. Slide in the next rack segments as required, ensuring that the ends of the segments butt up to each other. If necessary, adjust the set screw in step 4 so that the fit between the two segments is snug.
  6. Once all segments are in place, install the end stop to the last rack segment using a HW-FN-003-0018 instead of the set screw.
  7. rack and pinion assembly steps continued

  8. As received, the pinion housing assembly is pre-assembled.
  9. Attach the Rack and Pinion Housing to the extrusion via one of Venion's linear guides such as the Vention 16mm linear guide rails (Assembly requires shaft MO-LM-014-XXXX and bearings MO-LM-010-0001) or the Vention roller wheels (Assembly requires two eccentric wheels >MO-LM-001-0027 and two concentric wheels >MO-LM-001-0028).


  10. rack and pinion assembly steps continued

  11. Mount the intended powertrain parts such as the 5:1 gearbox and motor to the housing input and connect any extrusions or assembly plates to the sides or top of the housing.
  12. Assembly is complete.


  13. rack and pinion assembly step 10

Additional Assembly Tips

Wait to tighten the fasteners of the linear shaft until the pinion housing is mounted on the linear guide. Tighten the fasteners only as you move along the actuator with the pinion housing, allowing the guides to self align with the assembly.


Recomended Maintenance

The Vention Rack and Pinion System is very low maintenance. The unit comes with grease pre-applied to the pinion. All bearings in the assembly are double sealed and libricated for life. Occaional re-greasing of the gear teeth is recomended if the teeth are found runing dry. Use a grease with NLGI Classification of 2. Apply enough so that each tooth is coated but not so much that excess grease surrounds the rack.


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