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  • Users: imcjoek
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  1. imcjoek

    Paper sheet feeder.

    I am having a difficult time finding a description of how the typical paper sheet feeder (in say, a printer, copier, fax-machine, etc) works. How do they prevent feeding multiple sheets if the stack sticks together? Clearly some printers do a much better job than others at this, so there must...
  2. imcjoek

    Electromechanical replacement for pneumatics

    I have an existing system consists of a 5.5" long arm which pivots on bearings at one end, and loads against a product at the other. The load of the pivoting arm is provided by a pneumatic dashpot (a low friction air cylinder, essentially). We have applications which require this pivoting...
  3. imcjoek

    Problem Renaming iParts

    I have some funky behavior using Inventor 11 (not my choice to not upgrade...) and renaming of iParts and iAssemblies. Let us say I have an iPart called "TEST_PART.ipt" and it has children with member-names "TEST_PART-1.ipt" and "TEST_PART-2.ipt". Now I have all of this checked into vault. I...
  4. imcjoek

    Notch Sensitivity "q"

    We have a stepped shaft in the field that has failed (rather clearly through fatigue due to bending). I am trying to determine what should be done on the replacement shaft. It has failed right at a fillet, so obviously I will make that fillet larger (since the step cannot be eliminated). I am...
  5. imcjoek

    Thermal expansion. Permanent?

    I have an 8" ID ring made from 8620. The ring was case hardened to approximately Rc55 and ground to final dimensions. We made note of these dimensions at inspection of the part. The ring fits over a shaft which is made from 4130 and was also case hardened and ground to size. There is...
  6. imcjoek

    Sizing of vector duty motor for constant power load

    Hello, I have a problem which keeps coming back to me in my line of work involving how to size an AC vector motor. We build many winding machines. Usually these are "center wind" in that they drive the shaft and the material wraps around the spindle. We try to hold a constant tension on...
  7. imcjoek

    Deflection of indeterminate beam system

    Hello, I am trying to find an estimate of the deflection of a pair of rolls separated by elastic material. (see attached diagram). I am not sure what method to tackle this with. Basic indeterminate beams I can handle, but adding an elastic (viscous even) goop between two deflecting...
  8. imcjoek

    Several Questions

    Hello, I have a few questions related to Inventor 11 that perhaps someone may know the answers to. 1) When making 2d drawings (IDW) the balloons like to snap to certain angles (seems like 90, 30, 60 degrees). Is there a way to turn this off? It gets rather annoying when trying to line up...
  9. imcjoek

    Inventor R11 Constraint Error

    Hello, A coworker of mine is having problems with his Inventor R11 software. Ordinarily when an assembly is over-constrained, has constraints that conflict with each other, or geometry that is referenced by a constraint is deleted, an error box will appear in the top left stating the...

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