Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations pierreick 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: ElronMcK
  • Content: Threads
  • Order by date
  1. ElronMcK

    MIG pipe welding

    I am trying to improve my welding skill set. I am D1.1 certified in stick ("SMAW") 3G 3/4" max thick plate. 1. Assuming AWS and ASME pipe welding - say 0.2" up to 0.5" wall, out of position, short circuit GMAW-S, both shop and field My question: Is MIG with A75/C25 common and/or...
  2. ElronMcK

    Alum Plate Bend Test Fail

    Amateur question. I have been bending my practice weld coupons around a small pipe, then bending tighter in a vice - just to check ductility. Photos below are pre-bend and post-bend Background: Uphill, 3G One-sided complete joint pen at butt joint (no gap) 6061, 1/8" thick 3/32" 5356 filler...
  3. ElronMcK

    AWS D1.2 Welder Qualification TIG

    I am trying to get certified in TIG aluminum 6061 3G per D1.2 4043, up to 3/8" or 1/4" thick plate, and I am looking for guidance. I am trying to diversify my credentials for more job options. [I am a steel guy and am certified 3G D1.1. Not ASME. Almost everyone I know is a steel guy. Aluminum...
  4. ElronMcK

    Accelerometer Noise

    Hello my EE friends, First, I'm sorry for the amateur question. Second, I'm hoping this is the correct forum, since double posting is a grievous sin. I set up what I thought was plain vanilla instrumentation to measure and record structural vibrations. Teensy 4.1 (with simple Arduino code) and...
  5. ElronMcK

    Stepper motor acceleration

    Hello EE friends, I have a NEMA 34 stepper motor. I use it to drive a small shake table (single axis horizontal motion) using a simple harmonic sine function. 1.8 deg/full step. Driver setting = 400 steps/rev (0.9 deg/step) "half steps" 60V, 7 Amps Max Pull Out Torque = 87 in-lb (about 980...
  6. ElronMcK

    Shake Table - seismic

    Hello structural engineers, I posted a small scale shake table question on the Seismology forum, but haven't gotten any hits yet. I know double posting is a grave sin, so not repeating here, kindly asking any who might be interested to check out Seismology and weigh in on that thread. Thanks.
  7. ElronMcK

    Shake Table - Seismic - Scaling

    Hello Engineers Consider a uniaxial, horizontal motion, small scale shake table used to evaluate seismic retaining wall stability (sliding and overturning); comparing resultant horiz displacements for various accelerations and durations using simplified sinusoidal input motion. 1:12 scale –...

Part and Inventory Search