Drive

[Anonymous]

This question I am asking you to confirm. If we want to drive particular part in IAM file. 1st we must stop it by moving by constraint it.

In YouTube I have seen 3 constraint to stop a part moving. Is this a usual case?

[Anonymous]

Most of the time it will be three but not always.

It really depends on the type of part you have. 

[Anonymous]

I am asking this because basically it is 3 direction X, Y and Z.

[Anonymous · Accepted solution]

Your last statement is true, it is "locked" in three directions X,Y,Z.

But it won't  actually mean that there are 3 constraints needed. 

In the picture below I only used 2 constraints to lock it in these 3 directions

[Anonymous]

Thanks.

[Curtis_Waguespack]

---

@Anonymous wrote:

This question I am asking you to confirm. If we want to drive particular part in IAM file. 1st we must stop it by moving by constraint it.

In YouTube I have seen 3 constraint to stop a part moving. Is this a usual case?

---

Hi fiatnm,

I would say it is not always the case that an assembly must be fully constrained in order to drive it, however it is usually the case that we do fully constrain it, as doing so will provide the most predictable results.

Often we might want to drive a constraint to show motion, but also be able to click and drag on a part to show motion too. In those cases we apply a constraint to be driven, and then we suppress that constraint. This allows the "click and drag" motion, and then we can still drive the suppressed constraint when needed.

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

[Anonymous]

assembly must be fully constrained.

-------------------------------------------------------

If a sketch is fully constraint we can see right corner of bottom window word “Fully constraint”

How to make it sure that the assembly is fully constrained? Not moving parts.

[Curtis_Waguespack]

---

@Anonymous wrote:

If a sketch is fully constraint we can see right corner of bottom window word “Fully constraint”

How to make it sure that the assembly is fully constrained? Not moving parts.

---

Hi fiatnm ,

You can use the Degrees of Freedom tool to see this:

http://help.autodesk.com/view/INVNTOR/2015/ENU/?guid=GUID-3BCBF614-CF92-4980-A965-80AEAFEF768E

Many people prefer to turn on the Degrees of Freedom glyphs when they begin constraining, as it helps see how the applied constraints are working as each constraint is applied. Others prefer to turn it on later to see the remaining degrees of freedom. Still others seldom use this tool.

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

[SBix26]

---

@Anonymous wrote:
I am asking this because basically it is 3 direction X, Y and Z.

---

You missed the other three, the three rotations.  An unconstrained part has 6 degrees of freedom, three translation, three rotation.  The various constraint tools take away one or more (usually more) degrees of freedom, but it really depends on the geometry selected, and other constraints already existing.

Examples:

• A point mate-constrained to a plane only removes one degree of freedom (translation)
• An Insert constraint removes five degrees of freedom (three translation, two rotation)
• a plane mated to another plane removes three degrees (one translation, two rotation)

Try some other constraints with different geometry and see if you can work out what DOFs are taken away and what are left in each case.

Sam B

[Anonymous]

Examples:

• A point mate-constrained to a plane only removes one degree of freedom (translation)
• An Insert constraint removes five degrees of freedom (three translation, two rotation)
• a plane mated to another plane removes three degrees (one translation, two rotation)

-------------------------------------------------------------------------------

It is very informative. Thank you.