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  • Users: Peru
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  1. Peru

    G-levels on Robotic arms...

    On the contrary, instead of making it really light and spindly I'm testing it to see how rugged it is...or needs to be without turning it into a panzer tank. Also, I'm not trying to pick stuff up but shoot it with a laser beam (for industrial purposes only). So assuming everything is supposed...
  2. Peru

    G-levels on Robotic arms...

    Thanks for the info...looks like I found a local outfit that's willing to let me do a motion study on their equipment. Now, I'll get some specific field data... Thanks for the feedback. Mel
  3. Peru

    G-levels on Robotic arms...

    G-level is a relative acceleration value compared to 1 G (9.81 m/s/s). So .5 g level is 4.9 m/s/s. In my application, the laser is the auxiliary load and it would experience whatever speeds/g level's applied to it by the robotic arm. You refer to a default value by manufactures, do you have...
  4. Peru

    G-levels on Robotic arms...

    Can anyone give me an idea what g-levels a robotic arm carrying a 125 lb laser would reasonably expect? Laser cutting speeds are relatively slow perhaps up to 250mm/s, and probably g's less than .1 but when non-operational, any ideas? Thanks Mel
  5. Peru

    g-levels on Robotic Arms

    I'm in the process of doing vibration testing on some equipment that may go on a robotic arm. I would like to get an estimate on what g-levels the equipment may be subjected to...My equipment is 150 lbs not counting the robotic arm. It's been painfully difficult to get any information from...
  6. Peru

    6063 Aluminum at elevated temps

    Could anyone provide any info or published data on the yield strength of 6063-T5 at elevetated temps. I came across a chart that indicated that the yield strength of 6061-T6 at 200°C was ~80% of RT values after 30 min exposure. What about 6063? and at longer exposures? I looked in MIL-HDBK-5H...
  7. Peru

    Socket Head screws

    Heckler - So then, a socket head screw then by itself (no locking inserts etc) could potentially vibrate loose over time when fastened mated with a nut, pem nut, or simple threaded hole. I was curious if there was something about the geometry of the socket head that would explain that...
  8. Peru

    Socket Head screws

    Came across statement recently that read "lock washers are not used with socket head screws." I hadn't heard of this before so I'm curious...Anyone know if this is true? And why?
  9. Peru

    Cosmosworks

    We're looking at a package deal of SW 2005 (Premium) that includes Cosmosworks-Designer and SW Routing. Anyone have opinions on how well these modules function 1. Solidworks Routing...for tube routings and cabling? 2. Cosmosworks Designer vs Professional. Obviously the Professional has more...
  10. Peru

    Alballoy plating

    Does anyone know where I can find more info on this process? It's a trimetal (Cu/Sn/Zn) plating but I'm hoping to get some more information e.g. ASTM spec etc. Also, are there any issues with using stainless or nickel plated hardware in contact with alballoy coated parts. Thanks
  11. Peru

    6061-T6

    In my application, dimensional stability is more critical than strength (machined tolerances of +/- .001 over 12"), so I'm curious to see if the 5052-0 will maintain that before and after baking.
  12. Peru

    6061-T6

    Thanks for the info...so not only do the material specs change with temp but apparently dimensions as well...up to .0015 in/in. I am now curious about the dimensional/spec stability of non-heat-treatable AL alloys e.g. 5052-H32 at the elevated temps. Any ideas on this?
  13. Peru

    6061-T6

    We use 6061-T6 in lasers, and prior to using them we bake them at 250°C for 12-14 hours and allow to air cool? Does this have any effect on the material? Hardness, temper? None of the material I researched indicates a change to the material properties? Thanks
  14. Peru

    Inductance on a heater coil.

    I'm and ME so bear with me please.... I would like to run a 240V 3000W (2 1500W in parallel) heater using an Opto22 240D45 SSR to control the power to the heater. Opto22 tech support says I need to verify that I don't need a snubber circuit due to the inductive load on the heater coils. This...
  15. Peru

    Galling of stainless screws and pem nuts

    I'm looking for ideas on what can be done to prevent galling of these components... Both are class 2 8-32 threads. The PEMs are SP type...material for both is 300 series stainless and non-CRS is not an option at this point. Problems occur with both tightening with a screwdriver by hand and...
  16. Peru

    High Density Polyethylene Shear Strength

    Jimbo 2 You're not going to get much info out of McMaster Carr. They are sales people so even if they had the info in front of them they wouldn't know what they were looking at. Try this website for the info... www.matweb.com Good luck!
  17. Peru

    Gurley method

    Don't know if this helps... Gurley numbers are used to indicate the relative permeability of membranes or materials...The number (in sec) is obtained by measuring how long a known volume of air at constant pressure takes to pass through a material. Your constants would be air Pressure, Area of...
  18. Peru

    Steam Flow Rate

    I am looking for a quick and dirty way to determine the steam flow rate using a pressure transducer. Steam Tank pressure = 18psig, Steam Tank Temp = 225°F. Steam Flow is through a 3/32 orifice in a solenoid (approx 2psi drop), into 3/16 ID tube 8" Long.

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