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  1. rcoope

    Machinability of Pewter

    We are thinking about tin or tin alloys for an electron beam shielding application for radiotherapy. It could potentially replace Cerrobend (bismuth/lead alloy), which would in particular, enable us to cast squares of ~1cm thickness, and then waterjet specifically shaped cutouts. All the...
  2. rcoope

    Helmut Krebs Master Machinist, 1935-2022

    Here is a nice remembrance of University of Chicago instrument maker Helmut Krebs. https://physicalsciences.uchicago.edu/news/article/helmut-krebs-master-machinist-1935-2022/ U of Chicago really was one of the great places for experimental physics and chemistry, and you see here Krebs was...
  3. rcoope

    MasterCAM for Solidworks Discontinued, Anyone Know Anything?

    We just got a not that MasterCAM for Solidworks is being discontinued. I was curious if anyone knows anything more about the product strategy, if there is anyway. Is this because SW now has its own in-house CAM? I have to say, outside of pricing considerations, while MC4SW is a cool idea in...
  4. rcoope

    Why are there two MasterCAM simulators?

    We have finally been getting to grips with five axis simulations using a custom machine model I build of our VM-3 and TRT-160. The main challenge was figuring out how to position the workpiece properly so considerable YouTube watching was performed on company time. That, and looking at Mastercam...
  5. rcoope

    DWO Out of Range Error

    We are working to get a forth axis mode working on our new style TRT-160 (on a VM-3), where we rotate the B-axis to 90 so the C-axis rotates around the X-direction, and then it's like a regular rotary and we can run a tail stock etc. We've been working with the MasterCAM VAR to get the...
    • rcoope
    • Thread
    • Replies: 3
    • Forum: Haas
  6. rcoope

    13,000 lb Trailer going Washington State to Maryland

    A quick note, the best wooden boat builder on YouTube, Leo Gooden of @sampsonboatco (instagram) just took delivery of all his deck beams via a delivery by @thepinkfireman. They're looking for a load for him to take back. It's a 25', 13,000lb trailer. Taking some antique machinery would seem to...
  7. rcoope

    OT: Use of the word "clocking" for rotational angle alignment

    Here's a silly topic for a Monday: In an engineering call this morning, which involves Canadians and Americans and both physicians and engineers, the use of the word "clocking" was discussed, as the (Canadian) physician didn't know what it meant. I know a lot of American engineers use this term...
  8. rcoope

    New Machine Day - Hole in the Hospital Edition

    This is a major back fill as this actual move happened September 2018, and then we spent some time getting our TRT-160 five axis unit up and running (our timelines mostly) so it got put off. But I finally got some highlight pictures together so here we go. This is a biomedical prototyping and...
  9. rcoope

    Wildly Overpriced Big Cincinnati Shaper

    CINCINNATI Horizontal Heavy Duty Shaper - business/commercial - by dealer I thought I'd put this here so people could laugh, shake their heads, or maybe call the vendor and just yell at them. These folks seem to be reselling a lot of old machines on Craigslist in the Vancouver area and they...
  10. rcoope

    Old R&D Folks, Learn me up about Nylon/Delrin history

    I had a former engineering co-op student drop by the shop tonight to make parts for her class robot project and it led me to wonder when did we stop using nylon, because it sucks, and start using Delrin? Briefly, we redesigned her part, she machined the nylon she'd been given (to save course...
  11. rcoope

    Stretching 316 1/8 hard wire.

    I have a need to make some ~6" pieces of 316 wire rod which is say 0.064" for an inch and then around .06" for the next five. The thought was to take .064" wire from McMaster and stretch it on a 10,000N (2000lb) Instron machine which we have down to .061 or .060. It should yield at around 500lbs...
  12. rcoope

    Aluminum Alloys for a formed part and tube weldment

    I'm involved in the design of an electric vehicle that's at the bicycle end of the power spectrum. It looks like the best way to do the frame is a combination of laser cut and formed parts welded to stock tubes. This has been a common approach in the bike industry, see here for example: . The...
  13. rcoope

    Old Timers: Ron Fournier and the Absence of early 80's 5052???

    Hi all, thanks to great suggestions from PM here I got Ron Fouriner's 1982 book on sheet metal (via Abebooks.com), which is very good. Anyway, one surprising thing is he discusses different types of aluminum sheet, notably 6061 T4, T6 and -O, and 3000 series. Nowhere however does he talk about...
  14. rcoope

    VF-3 vs VF-3SS vs VM-3

    Hi, we are an R&D shop in a large biomedical institution that have just been given the opportunity to replace our 2007 TM-2 with a larger machine. Yay for large institutions that support great projects and yes the TM-2 is a fine machine but onward and upwards! We are currently planning to get a...
    • rcoope
    • Thread
    • Replies: 15
    • Forum: Haas
  15. rcoope

    OT: Lost Arts File: Stapled Ceramic Repair.

    In the spirit of the holiday season and eating on your family's fancy china, I have to share this find. This is from a set of Tiffany plates that belonged to my Grandmother so probably date from about 1930 when she got married. As you can see this one was broken and got stapled together! I had...
  16. rcoope

    Distortion problems in perforated shelves

    I was just apprised of a lab problem where all of the shelves in four cell incubators, which look like large bar fridges, are warped. This turns out to be a problem for certain cell growth protocols where they have 150mm petri dishes which need to be dead level so the growth medium is same depth...
  17. rcoope

    Folk wisdom required for press brake die

    I want to make some corner pieces as shown in 1/16" 5052 with a ~2" radius and about a 1/2" straight section on each end. The part is 10.5" long so the die set can, say, be 12" long. This is a personal project hence the need for a home brew solution and not sending it out or getting one of...
  18. rcoope

    Waterjet Sand Disposal Cleverness

    Hi all, we have to dig our water jet tank out about once a year, so for several years have been putting the sand in the general waste skip that is a permanent fixture of our institution. Anyway, for billing reasons we can't do this any more, so I have to explore other options. One is to get a...
  19. rcoope

    Flat belt flour mill in modern standards safety shocker

    Check this out: 'My heart just sank' Ontario flour mill may shut down over safety concerns - Home | As It Happens | CBC Radio A 193 year old flour mill with 1903 equipment runs into safety code issues. Folksy video to be found here: The Mill Of Arva - YouTube I think the interesting thing here...
  20. rcoope

    Anyone know what's up with the Haas TRT100?

    Haas had the TRT100 trunnion: http://www.haascnc.com/trt100.asp#gsc.tab=0 on their site but now it doesn't seem to be actually available. You can google for the page above but if you go to their rotaries and indexers section it's not there. We'd heard it had been taken off the market but was...

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