Select Diagnose from the browser context menu. Conflicts are displayed in bold type. Select Expand All from the context menu to expand all components in the list. Select the Display only conflicting constraints option to hide constraints without conflicts. Set constraints to Keep or Break. Click the symbol for a constraint to change that constraint.
Click the symbol for a component to change all constraints for that component. Click the symbol at the top of the dialog box to change all constraints listed. Toggle the grounded status of components. Select a component and click the Toggle Grounded Status button. Click the Check button to determine if all constraint conflicts are resolved. If the constraint is resolved, then the Solve Result changes to a green check and the Check button is disabled. You can continue to experiment and optimize the changes.
Select the Suppress broken constraints or Delete broken constraints option to control the effect on constraints. Click OK to accept the changes, or Cancel to exit the command without changing constraints.
Display the Constraint Management dialog box. Select a constraint in the list to highlight the constrained geometry in the graphics window.
Select Suppress constraints or Delete constraints to control the effect on constraints. Click Cancel to exit the Assemble or Grip Snap command without creating constraints. On the ribbon, click Tools tab Options panel Application Options. In the browser, right-click a constraint marked with either the or the symbol and select Recover to open the Design Doctor.
Select lists all constraint errors. Select a constraint error to highlight in the browser and graphics window. Examine provides detailed information and a suggested solution for the selected error. Click Unhighlight Problem to turn the highlighting off and on in the graphics window. Treat lists the options to resolve the selected error.
Select a treatment option. Edit Constraint opens the Edit Constraint dialog box. Delete Constraint deletes the constraint. If other constraints are associated with the deleted constraint, additional errors can require resolution. Suppress Constraint suppresses the constraint. If other constraints are associated with the suppressed constraint, additional errors can require resolution. Isolate and Edit Constraint turns off visibility of components so that you can see the affected constraint to edit.
Opens the Edit Constraint dialog box. Isolate Related Failed Constraints identifies all constraints and components that can cause the constraint failure. The visibility of the remaining components is turned off. Diagnose the Constraint displays the Constraint Conflict Analysis dialog box. You can break conflicting constraints to determine which ones require deletion or editing.
For treatments that open the Edit Constraint dialog box, evaluate the constraints and geometry to determine where the error lies and adjust constraint settings as needed.
For treatments that open the Constraint Conflict Analysis dialog box, you can change the status of constraints, and toggle the grounded status of components. You can test the changes to determine whether they resolve the constraint conflicts. If additional treatments are needed, repeat this procedure and further evaluate the cause. Adjust constraints as necessary. Use Isolate to turn off visibility of all components except the components you selected.
In an assembly, click the components you want to isolate in the graphics window or the browser. Right-click, and then select Isolate. All unselected components are set to Invisible status. Undo Isolate is available only after you isolate components.
Note: Use Isolate to identify constraint errors. For example: When the Design Doctor displays, use Isolate as a treatment to find the constraint. Right-click a component in the browser and select Isolate Component. All components are made invisible except the two participants in the constraint. Use the Assemble Constraint Management dialog box to suppress or delete conflicting constraints. Constraint List Lists the conflicting constraints.
Suppress constraints Suppresses the constraints you select. Delete constraints Deletes the constraints you select. Click Diagnose the Constraint in the Suppress Constraint error dialog box. Click Diagnose on the browser context menu. Status Provides the following commands, enabling you to change the status on multiple selected objects at the same time. Sets the selected constraints to keep.
For an. A Motion constraint maintains rotational or rotational-translational movement between components. You can specify the ratio or determine the ratio by picking geometry. To specify the ratio for rotational components, select a circular face or edge on each component. To calculate the ratio based on relative size, select a cylindrical face on each component.
To specify the distance for rotational-translational components, select a circular face or edge on the rotational component and a linear edge on the translational component. You can calculate the distance based on circumference and length.
Select a cylindrical face on the rotational component and a linear edge or sketched line on the translational component. A Transitional constraint maintains tangency between a typically cylindrical face and a contiguous set of faces on another part, such as a cam in a slot. You can slide the component along open degrees of freedom. Assembly constraints remove degrees of freedom between two selected components, positioning them relative to one another.
The Place Constraint dialog displays and you select a constraint type. The dialog updates and you make the selections for that type of constraint. A mini toolbar displays in the graphics window instead of a dialog.
As you select geometry, the list of constraint types updates based on those selections. The first component always moves to the second component, even if the first component is fully constrained. If this causes constraint errors, the Assembly Constraint Management dialog lists the conflicting constraints so you can suppress or delete them. You can only add constraints to one component at a time with Assemble.
When you restart Assemble you select the next component you want to constrain. The Constraint Type list updates as you select geometry to list only valid constraints. You can select a constraint type at any time to limit the type of geometry you can select. For example, if you select Insert- Opposed, you can only select circular edges. Assembly constraints remove degrees of freedom between selected components. Adaptive components can resize or change shape when constraints are applied.
Specifies the type of constraint and illustrates the solution used to position components before you apply the constraint. Change constraint type and place constraints when the dialog box is open. When you select a face, curve, or point including midpoint , an arrow shows the default direction of the solution. Click constraint icons on the dialog box to change solution.
Use constraint limits to define the range of allowable movement or rotation. You can specify a maximum, minimum, and resting position value for constraints in the Assembly tab.
A Mate constraint positions components face to face or next to one another with faces flush. Removes one degree of linear translation and two degrees of angular rotation between planar surfaces. A Mate constraint positions selected faces normal to one another, with faces coincident.
A Flush constraint aligns components next to one another with faces flush. Positions selected faces, curves, or points so that they are aligned with surface normals pointing in the same direction. An Angle constraint positions edges or planar faces on two components at a specified angle to define a pivot point.
Removes one degree of freedom in rotation or two degrees of angular rotation between planar surfaces. Undirected Angle allows either orientation, thus resolving situations where component orientation flips during a constraint drive or drag. Explicit Reference Vector Explicitly defines direction of Z axis vector Cross Product by adding a third pick to the selection process. Reduces tendency of angle constraint to switch to an alternate solution during a constraint drive or drag.
This solution is the default. A Tangent constraint causes faces, planes, cylinders, spheres, and cones to contact at the point of tangency. Tangency can be inside or outside a curve, depending on the direction of the selected surface normal.
A tangent constraint removes one degree of linear translation. Between a cylinder and a plane, it removes one degree of linear freedom and one degree of rotational freedom.
Inside Positions the first selected part inside the second selected part at the tangent point. Outside Positions the first selected part outside the second selected part at the tangent point. Outside tangency is the default solution. An Insert constraint is a combination of a face-to-face mate constraint between planar faces and a mate constraint between the axes of the two components. The Insert constraint positions a bolt shank in a hole.
The shank aligns with the hole and the bottom of the bolt head mates with the planar face. A rotational degree of freedom remains open.
Selects geometry on two components to constrain together. You can specify one or more curves, planes, or points to define how features fit together. You can see the geometry to which a constraint is applied. A color bar on each selection button corresponds to the color of the selected geometry. First Selection Selects curves, planes or points on the first component. To end the first selection, click Second Selection or the second face in the graphics window.
The first selection is previewed in the same color as the select button color bar in the graphics window. Second Selection Selects curves, planes, or points on the second component. The second selection is previewed in the same color as the select button color bar in the graphics window.
Selects a face, linear edge, work plane, or work axis. The third selection is previewed in the same color as the select button color bar in the graphics window. Pick Part First Limits the selectable geometry to a single component. Use when components are close to or partially obscure one another. Clear the check box to restore selection mode.
Use to enter a value equal to a distance or angle that exists in the assembly, but when you do not know the offset or angle. Click the down arrow to measure the angle or distance between components, show dimensions of selected component, or enter a recently used value. Specify positive or negative values. Default setting is zero. The first picked component determines the positive direction.
Enter a negative number to reverse the offset or angle direction. Shows effect of the constraint on the selected geometry. After both selections are made, underconstrained objects automatically move into constrained positions.
Default setting is on. Clear the check box to turn preview off. If the Offset box is empty, inserts the offset and orientation for mate, flush, and angle constraints. The default setting is On. Clear the check box to set orientation and offset manually. For an angle constraint, with an empty Offset box, the angle is measured and automatically applied.
Creates a unique name for the constraint in the browser. You can enter a name or leave blank and a default name is automatically created. Use Offset As Resting Position Sets the offset value as the default position of a constraint with limits. For example, a constraint with a Maximum value of mm, a Minimum of 0-mm and an Offset of mm assumes the mm position after a drag.
Maximum Sets the maximum extent of constraint movement. Check the box to activate. Clear the check box to deactivate. The assigned value is retained when the check box is cleared. Minimum Sets the minimum extent of constraint movement. Motion constraints specify the intended motion between assembly components. Because they operate only on open degrees of freedom, they do not conflict with positional constraints, resize adaptive parts, or move grounded components.
Motion constraints are shown in the browser. When clicked or the cursor hovers over the browser entry, constrained components are highlighted in the graphics window. The Drive Constraint command is not available for motion constraints. However, parts constrained by motion constraints can be indirectly driven according to the specified direction and ratio.
Specifies the constraint type and illustrates the solution that shows the intended motion between selected components. May be applied between linear, planar, cylindrical, and conical elements. You can change constraint type when the dialog box is open during constraint placement or editing. When the cursor pauses over a component, an arrow shows the direction of the constraint. In the Solution box, click Forward or Reverse to change direction. Rotation constraint specifies that the first selected part rotates in relation to another part using a specified ratio.
Typically used for bearings, gears and pulleys. Rotation-Translation constraint specifies that the first selected part rotates in relation to translation of another part using a specified distance. Typically used to show planar motion, such as a rack and pinion. First Selection Selects the first component. Select a planar face to specify the ratio or distance. Select a cylindrical face to calculate the ratio or distance. The selection is previewed in red in the graphics screen.
To end the first selection, click Second Selection. Second Selection Selects the second component. Select a cylindrical face on a rotational component or a linear edge on a translational component to calculate the ratio or distance. The selection is previewed in green in the graphics screen. To select different geometry on the first component, click First Selection and reselect. Specifies the movement of the first selected component relative to the second selected component.
For Rotation constraints, the ratio specifies how much the second selection rotates when the first selection rotates. For example, a value of 4. A value of 0. The default value is 1. If two cylindrical surfaces are selected, Autodesk Inventor computes and displays a default ratio that is relative to the radii of the two selections.
For Rotation-Translation constraints, the distance specifies how much the second selection moves relative to one rotation of the first selection. If the first selection is a cylindrical surface, Autodesk Inventor computes and displays a default distance that is the circumference of the first selection. Note: Although The ratio and distance parameters are used to specify the amount of movement for the second selection with respect to the first selection.
However, the constraint is bidirectional. If the second selection is moved, the first selection moves by an inverse amount of either the ratio or distance, as appropriate to the constraint type.
A transitional constraint specifies the intended relationship between typically a cylindrical part face and a contiguous set of faces on another part, such as a cam in a slot.
A transitional constraint maintains contact between the faces as you slide the component along open degrees of freedom. First Selection Moving Face Selects the first component. Second Selection Transitional Face Selects the second component. To select different geometry on the first component, click First Selection, and then reselect. Clear the check box to restore feature priority selection mode.
Constraint Set enables you to constrain two UCSs together. You can select UCS in part or assembly file. Use when UCSs are close to or partially obscure one another. Select the check box to preview the constraint to apply. Simulates mechanical motion by driving a constraint through a sequence of steps.
The component repositions sequentially by specified increments and a distance. Set a precise amount of motion along a vector or about an axis. Use to simulate motion or test a range of motion for a constrained component. Click More to override default values for Increment and Repetitions. Sets start position of the offset or angle. Value can be entered, measured, or set to dimensioned value. Default value is the defined offset or angle.
Sets end position of the offset or angle. Default is start value plus Drives the constrained assembly until a collision is detected. When an interference is detected, it is displayed and its constraint value shown.
Amount of Value specifies that the increment is the value specified in the edit box. Default is 1. Total of Steps divides the drive sequence into a specified number of equal steps. Edit box sets the value of each increment or the number of steps. Value can be measured, entered, or as dimensioned.
Number of cycles completed within one repetition is dependent on the Edit Box value. Each movement is considered one cycle. Specifies the increments at which a "snapshot" is taken for inclusion as a frame in a recorded animation. Advance and reverse the drive sequence. The dialog box remains open while the drive sequence plays.
Values can be changed any time the sequence is paused or stopped. Forward drives the constraint forward. Not available unless both Start and End boxes have values. May resume forward play after a Stop. Reverse drives the constraint in reverse. May resume reverse play after a Stop. Stop temporarily stops the constraint drive sequence.
Allows values to be edited and forward or reverse play to be resumed, advanced a step at a time, or advanced to beginning or end. Go to Start returns the constraint to the starting value and resets the constraint driver.
Not available unless the constraint driver has been run. Single Step Reverse reverses the constraint driver one step in the sequence. Not available unless the drive sequence has been stopped. Single Step Forward advances the constraint driver one step in the sequence. Start recording begins capturing frames at the specified rate for inclusion in an animation.
Sets properties for saving the simulated mechanical motion of a driven constraint to an. In the browser, right-click an assembly constraint and select Drive Constraint. Then click Record in the Drive Constraint dialog box.
Enter the file name in the Save As dialog box, and click Save. Displays a list of export profiles from which to select. See the information about the selected profile in the Profile Description field. Specifies the network bandwidth.
Select the bandwidth corresponding to your network connection. This option controls size of the output file and quality of the recording. Skip to main content. Knowledge Network. To translate this article, select a language.
View Original Translate. English Original X. View Original X. Assembly constraints overview Procedures References Assembly constraints determine how components in the assembly fit together. What types of assembly constraints are available? The Assembly tab has the following constraints to control position: A mate constraint positions the components so the selected faces are parallel to one another.
The mate condition positions the faces opposite each other. The flush condition positions the faces in the same direction. The faces can be offset from one another. An angle constraint positions linear or planar faces on two components at a specified angle.
A tangent constraint between planes, cylinders, spheres, cones, and ruled splines causes geometry to contact at the point of tangency. Tangency can be inside or outside a curve. An insert constraint positions cylindrical features with planar faces perpendicular to the cylinder axis. The Motion tab has the following constraints to specify intended motion ratios between assembly components: A rotation-rotation constraint specifies rotation of one part relative to another part using a calculated or specified ratio.
A rotation-translation constraint specifies rotation of one part relative to translation of a second part. Constraints are created using either the Constrain command or the Assemble command. Constrain command You select a constraint type to update the Place Constraint dialog box then select the objects to constrain.
Assemble command You select the objects to constrain, and then select the type of constraint to apply. Grip Snap command Grip Snap moves a component relative to another component or reference geometry. Before deciding on the appropriate method, consider the following: Use constraint limits to define the range of allowable movement or rotation. Motion constraints use defined rotational or rotational-translational ratios to depict movement between components.
Use motion constraints for a lightweight method to verify movement such as the proper gear ratio. Contact Sets use physical contact between components to limit movement. If interference is detected, the components do not move. This method requires more computation than a motion constraint. This page has been translated for your convenience with an automatic translation service. This is not an official translation and may contain errors and inaccurate translations.
Autodesk does not warrant, either expressly or implied, the accuracy, reliability or completeness of the information translated by the machine translation service and will not be liable for damages or losses caused by the trust placed in the translation service. Back to Inventor Category. Back to Topic Listing Previous Next. Filter by Lables. Message 1 of Does anyone know of a good tutorial on using assembly constraints?
I am pretty new to Inventor and am having a lot of trouble getting the parts to do what I want. Presently, I'm trying to locate a tapped block around the outside of a radius. Where can I turn to read about assembly constraints? Thank you very much for your help. Message 2 of Have you gone through the tutorials? Message 3 of Yes, that was the first place I went to. I'm just not finding what I am needing to do.
I'll just continue to search around as I have time. Thanks for the reply. Message 4 of Maybe the best way to learn is zip and post your parts with the parts moved to approximate locations.
You will probably get several possible solutions that you can reverse engineer or ask questions about.
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