Jan 30, 2009 user friendly edit boxes allow for the complete input of motion types and their properties, along with the characteristics of the cam and its follower. Cycloidal cam gears for high onestep transmissions with optimus motus software. They are also one of the most difficult machine components to design because of their mathematical complexity. We will discuss the differential method for finding relation between the angular velocity of a cam and the linear velocity of a follower. The acceleration is finite at all times and the starting and ending acceleration is zero. During normal operation, the base shaft drives the eccentric cam. Professional cam and perfect cam is the ideal and complete software for engineering, team, tuner, etc. Cam cutting coordinates, interference checking radius of curvature, export cams directly to solidworks. It gives a relatively large pressure angle and so might need a large cam for a given lift and predetermined pressure angle limits, to reduce it. The main rotating components of such reducer mechanism are shown in an exploded view in figure 1. This motionlaw is recommended in applications where no sudden change of input torque is a requirement. Because some sliding contact occurs in all gear designs, involute gearing will tend to have more friction that a comparable cycloidal design.
The output format has changed from svg to dxf which is more commonly used in cad and cam applications. The method termed inversion is commonly used in cam profile design. Cycloidal drive motion animation cycloidal drive explode animation cycloidal drive solidworks files. Design of cycloidal gear reducer with mechdesigner duration. Camtrax64 helps the designer create solid models of virtually every type of cam with the dynamic motion control. Mar 18, 20 design a cam with the base circle diameter of 40mm and width of 18mm. The motion program of the cam is usually synthesized by using a combination of the standard motions such as parabolic, simple harmonic, and cycloidal functions according to the design requirements 1. Design of a cam with reciprocating roller follower.
Before going to the actual design of cam profile, lets look at the basic terminologies. This application is used as an aid to the design of simple spur gears using, involute, cycloidal, recoil escape, deadbeat escape and ratchet wheel tooth form. Cam design equations replace graphics machine design. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. Cycloidal cv50 cam law, motionlaw cycloidal with 50% of the segmentwidth has constantvelocity is a traditional motionlaws. Building a cam mechanism with some inverse kinematics and motion design in motiondesigner. Design of a twostage cycloidal gear reducer with tooth. For example, in a disk cam with translating follower mechanism, the follower translates when the cam turns. Cam design and mechanism analysis can be done quickly in an affordable. Camtofollower if you have an existing cam and want to design or derive the follower motion, this design method lets you input the cams.
Using matlab or excel software a plot the follower svaj diagram, and b plot the cam shape, c plot the pressure angle vs the cam angle, and. Design of cycloidal gear reducer with mechdesigner youtube. We would normally recommend that you use specialist software for the design of engine camshaft because there are special requirements for valve timing. Draw the cam profile with the above dimensions using design software. Cam and follower design basics design of cam profiles and. The nabtesco reducer consists of a patented twostage cycloidal design that provides large torque, highratio and significant shockload capabilities with extreme precision and excellent quality. Norton, design of machinery introduction to cam design.
Explain what a cam is, how it is used, and the typical types of cams identify force closed and form closed followers and explain the benefits and limitations of each describe the primary types of cam motion programs introduction to cam design source. This open source cycloidal gear builder is an evolution of a desktop app that i developed in 2012. The valve moves with uniform acceleration and deacceleration for each half of the lift. The dynamic simulation and analysis of a cycloidal speed. Gear design software to model most gear arrangements. Jul 02, 2014 tutorial cycloidal drive with solidworks. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Segmenteditor and blendpoint editor can specify the. As it moves, the cycloidal disk engages the internal teeth of the ringgear housing. This article will discuss the calculation method of the velocity of cam follower. The eccentric cam is pressed onto the highspeed shaft to complete the subassembly and, as it. Mechanical engineering notes mechanical jobs 4b engineers. They are also one of the most difficult machine components.
The new version runs in modern browsers with webgl support if in doubt, use chrome. Gear generator is a tool for creating involute spur gears and download them in svg format. A traditional twostage cycloidal speed reducer is obtained by the simple combination of singlestage cycloidal. Graphical demonstration of the method of construction of a time displacement curve of a cycloidal motion. With excel the designer can analyze the cam motions and compare different motion synthesis. Computer aided design of cam motion programs sciencedirect. Analytix cams 21 reference manual displacement directly into the data table and analytix cams 21 will automatically derive the cam profile for you. Since this is more about clock construction than wood clocks, i. A rotation of the input shaft mounted eccentric cam generates swaying and rotational components of motion in the system. In this paper, we propose a new approach for the exact geometric design of the cycloidal plate gears without interference in the cycloid drives using the principle of instant velocity center and the homogeneous coordinate transformation. See more on this video shows how to design a cycloidal gear with a normal cad system. With the adjustable 2 stage smoothing function its also easy to get low jerk values without compromising the lift curve. Within the curves we have thus far seen, cycloidal motion curve has the best dynamic characteristics.
Design of a twostage cycloidal gear reducer with tooth modifications. Though electronic motion controllers have replaced cams in my applications, cams may still be best in situations that require complex motions. Involute, cycloidal and clock gear gcode generator. Some of the features that we will be using are the parametric feature on the equation driven curve tool and the cam mate used in assemblies. Quickly design cams of virtually any type inside solidworks with the dynamic motion control parameters your system requires. Basic radius r 0 disc and cylindrical cams motion length l c linear cams cam width b c roller radius r r roller width b r for follower shape cylinder eccentricity e disc cams for translating follower eccentricity angle. The cam spins inside the cycloidal disk, causing it to rotate in an eccentric pattern about an offset axis. In this tutorial i will be going over how to make a cycloidal drive in solidworks. First, you choose the cam follower type and such things as direction of rotation and follower offset.
What follows are diagrams for displacement, velocity and acceleration, as well as an animated simulation of the cam profile and the follower. Cam design software is fully integrated into mechdesigner. This cycloidal drive was made using information provided by joongho shin and soonman kwons paper on the lobe profile design in a cycloid reducer using instant velocity center. Auggie cam, is ou current motion controller software package, it too can be downloaded and installed seperatly using link below. Designingdrawing cycloidal gears nawcc message board. Cycloidal motion curve contd the equations relating the follower displacement, velocity and acceleration to the cam rotation angle are. Auggie is our programable and versatile cam controller to deal with cnc or laser work. Nabtescos cycloidal gear technology is the far superior choice when compared to traditional planetary and cam indexing devices. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the inputoutput ratio and rotation speed. In this paper, we propose a new approach for the exact geometric design of the cycloidal plate gears without interference in the cycloid drives using the principle of instant velocity center and the homogeneous coordinate transformation technique. Professional cam and perfect cam software to design the. Cycloidal camlaw, motionlaw cycloidal is a traditional motionlaw.
Cam mechanisms can be classified according to motion. Dynamic analysis of a cycloidal gearbox using finite element. Camtrax software utilizes a unique visual layout system which allows the creation of cams to be done quickly and easily. First, you choose the camfollower type and such things as direction of rotation and follower offset. You can model most gear design arrangements and gear trains. The motionlaw is a sine function when viewed in acceleration. If he actually wanted to use it, inside his own software, and distribute it without the source code, i would expect to. Then select a range of cam rotation, specify the starting and ending requirements for follower displacement, and the desired curve type such as cycloidal, dwell, or constant acceleration. The dynamic simulation and analysis of a cycloidal speed reducer. Powerful, bestinclass software optimus motus for motion design, cam. Cam mechanisms are widely used because with them, different types of motion can be possible. You can model then let mechdesigner calculate the cam coordinates of just about every cam type, including.
Involute and cycloidal gear designer gcode generator. Flat, plate, groove, conjugate, barrel, globoidal, ferguson, roller gear drives. Here, a cycloidal disc with eight holes rotates on an eccentric bearing cam. A diagram of the cycloidal motion velocity is presented in figure 3. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of. Linear and cylindrical cams for translating follower pivot distance y disc and linear cams for swinging arm arm length l a disc and linear cams for. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system. Hi all, im in the process of designing a wood clock and need some help in the designingdrawing of the cycloidal gears. In essence, you have a rotating shaft of a motor center attached an eccentric cam orange that rotates feely inside a ball bearing. Cycloidalcv50 camlaw, motionlaw cycloidal with 50% of the segmentwidth has constantvelocity is a traditional motionlaws. Design a cam with the base circle diameter of 40mm and width of 18mm. Cycloidal cam law, motionlaw cycloidal is a traditional motionlaw. Introduction the cam mechanisms have been extensively used in machine centers, automobiles, toys, and analog control devices. However, the manufacturing of cams is expensive and the wear effect due to the.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. You can edit and analyze all of its kinematic properties. Involute gears normally mesh with 2 or 3 teeth in contact at the same time while cycloidal gears can be designed so that only 1 or 2 teeth are in contact at a time. User friendly edit boxes allow for the complete input of motion types and their properties, along with the characteristics of the cam and its follower. Professional cam and perfect cam software to design the cams. Cad software for cam, mechanism and motion design, analysis and. This means that the relative motion between them is a combination of a relative turning motion and a relative translating motion. Any cam profile developed in analytix cams can also be used inside analytix mechanical simulation software to analyze the cam motion in combination with actuators, linkages, or other parts of a larger mechanical system. Ive spent quite the considerable amount of time trying to figure out how to properly design a cycloidal diskgear.
The velocity of any cam follower can be calculated using the deferential method provided you have the equation relating the angular. Mechanism, indexer and cam design software optimus motus. Splines arent as limited as the more common polynomial curve approach and with splines its easy to design an asymmetric lift profile. While mechdesigner software is particularly suited to packaging machine design, it can also be used to design camshafts for engines. May 24, 2012 design of a cam with reciprocating roller follower. The basic purpose of using the cam follower is converting the rotary motion of the cam to the translating or oscillatory motion of the follower. Mechdesigner software makes it easy to add gearpairs that will transmit motion and force naturally through the mechanisms linkages. Cam design software is fully integrated into mechdesigner you can model then let mechdesigner calculate the cam coordinates of just about every cam type, including. Dec 15, 2017 the cycloidal cam has lobes or teeth that engage with a cam follower, typically with pin or needle bearings.
The internal meshing reverses the rotational velocity direction. Cam design and mechanism analysis can be done quickly in an affordable, integrated solution. The cycloidal cam has lobes or teeth that engage with a cam follower, typically with pin or needle bearings. Analytix cams mechanical engineering software saltire software. Cam designs often use conjugate cams for improved performance. The eccentric rotation of the cam is transformed into rotation of an output shaft at a reduced speed and an increase in torque. Sep 19, 2014 see more on this video shows how to design a cycloidal gear with a normal cad system. Assume a cycloidal motion to design the cam, and use a rollerend follower. I suppose if he was going to design something and patent it, it might come into play. Gears can be animated with various speed to demonstrate working mechanism. But only if he was using my code inside his design. A new design of a twostage cycloidal speed reducer is presented in this paper.