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  • Users: Slagathor
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  1. Slagathor

    Solidworks 2024 strange behavior...

    We just jumped from SW 2019 to SW 2024. We also updated video drivers to that recommended by the Solidworks compatibility listing. We have noted some strange behavior. Specifically, when you open some sort of setting window like the System or Document properties interface, and go to close...
  2. Slagathor

    No Penetration Boundary Condition in Modal FEM (Solving for Natural Frequencies)

    We regularly perform FEA based Modal Analysis on what are essentially cantilevered vertical structures. The bases are bolted joints, and the real world interface between the sole plates and the structure are a can be a source of significant error. If we model as a bonded contact, the...
  3. Slagathor

    Induction Motors- PF low on Phase B

    We have a Stormwater Pump Station that is exhibiting strange behavior. *(3) 150 890 RPM 3/60/480V motors. FLA = 186 *We are at the far end of the power dist run *Pump/Motor 1 by itself runs OK. 130-140A. 483V *Add Pump/Motor 2, and the amps of Motor2 rise more than pump load indicates they...
  4. Slagathor

    Thrust Stand Design

    I am hoping for some experienced feedback on a thrust stand design for a vertical pump application Axial Load = 22,000# steady state down (there is a change of 0-5 second upthrust, up to 3,000# during start up) RPM = 510 Radial Loads at each shaft end = minimal. Mainly due to misalignment and...
  5. Slagathor

    Simple CAN Bus Module Needed

    I am looking for a very basic CAN Bus modules that can take simple discrete inputs, and the broadcast the switch state into a CAN network (1Mbit) 5,8 or 12V DC Powered 1MBit broadcast rate The most basic single CAN message broadcasts 8 bytes..which means I could transmit 64 switch states! I...
  6. Slagathor

    Speed Torque (Starting) Characteristics for High Nss Pump - Acceleration Head Effects

    First of all, lets consider a High Nss pump...in the 9000+ range. So it has a steep H-C curve, and more importantly for the purposes of this issue, a high shut off HP. Shut-Off head HP is 2.4 x HP at BEP! Like the right most curve here: (If this image does not come though, you can view it...
  7. Slagathor

    Strain Gauge Circuit - Torque measurement (shear straing) in the presence of axial load

    I am hoping someone with expertise in strain gauge configurations can offer some guidance. My company has need to doing some torque testing on a rotating shaft. We are looking at a number of wireless strain gauge set ups that can handle the task. The question I have is not really related to...
  8. Slagathor

    Required Pre-Load: Flange with O-Ring instead of Gasket

    I have a decent understanding of gasketed flange joint (m,y factors / Modern Flange Design 502 Bulletin / ASME Section 8) design, but for some reason I am having a hard time getting my head around an o-ring joint. Lets say we have a 300# flange pair, flat faced. Instead of using a gasket, we...
  9. Slagathor

    Part Numbering - Tabulation vs. Length Per Order vs. Significant Numbering

    I am a believer in the following: -Some minor form of significance in the part number. Mainly to make it easier to transpose and recall the "important" part of the PN..and make that part "smaller"...ie for 'useablity'. -No significance in the key part of the number. -Using field based...
  10. Slagathor

    Reversing the functionality of a Design Table

    Has anyone developed an Add-In for essentially reversing the functionality of a design table? What I am looking for is to have an Excel spreadsheet driven by dimensions, parameters etc. from the model (as opposed to the model being driven by the spreadsheet). I know that you can do this to...
  11. Slagathor

    Best Practice - Material Codes + Part Numbers?

    I am huge proponent of Non-Sig part numbers, with carefully predefined field hierarchies for description creation withing families. I also like pre-defined ranges for specific types of parts. Here is an example of a 7 number system. See linked PDF here...
  12. Slagathor

    O-Ring Between Flat Face Flanges?

    I have a manufacturer telling my client to use a 7mm o-ring to seal between two 16" 125# cast flanges. There is no o-ring groove. The manufacturers sales rep is saying to just put the O ring between the flange faces, even though there is nothing to locate it. This seems absurd to me. Has...
  13. Slagathor

    3600 RPM Flywheel - 400 Lb*ft^2!!

    I have a customer that would like a flywheel added to pump system so as to prevent downsurge in a pipeline during power failure. Much cost and time has gone into developing this "solution". The problem, as I see it, is that no one bothered to see how challenging the development of a flywheel...
  14. Slagathor

    Solid Works 2010 SP4 64 bit hanging...

    Suddenly SW2010 SP4 hangs on start up. It gets stuck on the splash screen. If I start it up AGAIN..the 2nd copy will not hang. Then I go in and kill the 1st...and it all seems OK. Any ideas?
  15. Slagathor

    Study Materials for ISO 18436 Level II Certification

    I am looking for guidance on useful study and reference materials for the Level II Certification Exam given by the Vibration Institute. I am a B.S. Mech Engineering, and have been doing equipment vibration analysis on and off for about 15 years, all on pumping equipment. It was not my primary...
  16. Slagathor

    Thermal Expansion Analysis

    Are there any software packages out there that do a decent job of predicting deformation or complex shapes due to thermal effects? The parts I want to analyze will be castings, so material is uniform. I am looking to minimize the angular distortion of mounting points, so as to maintain...
  17. Slagathor

    Hybid Articulated Arm + Linear Way CMM??

    I know that in 2000, Romer introduced a hybrid articulated arm CMM that was mounted on a linear rail, to facilitate the measurement of large parts, but I can not seem to find any info on anything like this. A CMM of this type would be ideal for us. We need to inspect parts that can be fairly...
  18. Slagathor

    Circular Pattern - Problem Driving Instance Count with Design Table

    I have set up a circular pattern about 5 different ways...and none of them work. I am about to rip my hair out... I am trying to get a design table to drive a generalized bolt pattern sketch, with everything driven by the DT. The one thing that is not configured...is the center point or the...
  19. Slagathor

    Has anyone made a Macro to do this....?

    I am working with design tables for fairly large parts. 150-250 features..... The DT approach we are using utilizes a lot of varying supression state combinations. When you create a DT for part with this many features..SW often jumbles the order of the features...leaves some out, etc...
  20. Slagathor

    SW 2011 SP1 vs 2010 SP4

    I could not justify the subscription service...so I let it expire. I was at SW 2011 SP1.0 when this happened. I currently have 2010 SP4 in use (64 bit on workstations, 32 bit on laptops). I don't normally like to jump versions till at least SP2 or 3, to let the bugs get worked out.... What...

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