Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: SC83
  • Content: Threads
  • Order by date
  1. SC83

    Reaction forces of a table

    All, I need to check if a table with a motor mounted on top of it will stand still or not under a rotational torque, i.e. starting torque of the motor. I added a top view of the square table with 4 legs (black). The rotation axis of the motor is indicated with a blue dot and is not in the...
  2. SC83

    Inertia of SCARA robot

    I want to calculate the inertia of a SCARA robot. The arms/end effector move only in the XY-plane by rotating its 3 arms. How do I calculate the total inertia around the Z-axis? I_arm_1_Z = I_arm_1_COG + m1.r1^2 I_arm_2_Z = I_arm_1_COG + m2.r2^2 I_arm_3_Z = I_arm_3_COG + m3.r3^2 I...
  3. SC83

    Reaction forces of moving SCARA robot

    Dear, I have to design a table for a SCARA robot which will be mounted on top of this table. I'm not allowed to bolt the table (consisting of 4 legs bosch frame and aluminium top plate) on the ground (drilling of holes in the ground is not allowed). I need to know if the table will stand still...
  4. SC83

    Heat flow through composite wall with varying cross-sectional area

    Hi, I have a composite wall of two layers of materials A and B tightly fitted to one another. The cross-sectional area of A and B are not equal. Questions: - is the conduction Q through material A and B equal? If so, then the heat flux (Q/cross-sectional area) through material A and B are not...
  5. SC83

    Heat conduction with variable conductivity

    I want to reduce the heat conduction through a steel rod by locally reducing the cross-section of the steel rod. However, it seems that the conduction through the rod is not dependent on the position of the reduced cross-section (i.e. near the hot or cold surface). I'm trying to explain this...
  6. SC83

    State space model of mass spring damper with base excitation

    Dear, I want to make a state space model of a simple mass spring damper system with a base excitation as shown in the figure below. The equation of motion is: mx'' + bx' + kx = ky + by' How can I write this in state space (A,B,C,D) format? I have difficulties with finding the B matrix. y(t)...
  7. SC83

    Parallel leaf springs

    All, I'm designing a construction with 2 leaf springs in parallel. I have found the formulas to calculate the lateral stiffness of the leaf springs on following website: https://www.janssenprecisionengineering.com/page/flexure-guiding-2-leaf-springs-in-parallel/ However, in my case, both leaf...
  8. SC83

    Lateral stiffness of a spring

    Hi, Is there a simple formula to calculate the lateral stiffness of a compression spring when both ends stay in parallel (see figure in attachment)?
  9. SC83

    Vacuum force

    Hi, I have a bottom plate resting on a table (see figure in attachment). On top of this bottom plate is are series of springs and on top of it rests a top plate. Between the bottom and top plate (inside the springs) is a seal to create a vacuum chamber. Question: what is the total vacuum force...
  10. SC83

    Calculate temperature rise from turning a screw spindle in a nut

    Hi, Does someone know how I can calculate the temperature rise from turning a screw spindle in a nut (thus no ball screw)? The spindle is of stainless steel, the nut of brass. I don't use any lubrication. Thanks.
  11. SC83

    Alignment force

    I have a cup (see figure) that will be pushed on a conical tip with a force F. The cup is not perfectly aligned with the conical tip and touches it in point 'A'. The cup is flexible supported. In the X-direction it can translate via a spring with a stiffness K_x. The cup can also rotate via a...
  12. SC83

    Deflection of a beam supported by two other beams

    Hi, I want to calculate the deflection of a beam (tube) with a uniform load that is applied over a length Ww. The tube is supported by two other (smaller) rolls (see layout in the image below). All three rolls are mounted in a bearing at the end. How can I do this?

Part and Inventory Search

Back
Top