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Type: Posts; User: implmex

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  1. Replies
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    Hi Milland: The problem with fixturing from the...

    Hi Milland:
    The problem with fixturing from the bore is that the lower head that guides the wire is connected to an arm which must be able to pass under the part.
    So the part needs to be "hung"...
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    Hi again coyotebgone: The EDM process relies on...

    Hi again coyotebgone:
    The EDM process relies on maintaining a gap between the workpiece and an electrode and that gap is filled with a dielectric fluid who's function is to create just enough...
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    387

    Hi Milland: The difficulty with what you...

    Hi Milland:
    The difficulty with what you propose, is that he creates a helluva fixturing problem for himself if he roughs the blanks, then cases them and then has to find a way to set them back up...
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    Good morning panscan: The step that will create...

    Good morning panscan:
    The step that will create the most problems for you is the case hardening step, because of the distortion it produces.
    It doesn't matter how you cut the gears; as soon as you...
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    362

    Hi coyotebgone: I have a Hansvedt CNC sinker...

    Hi coyotebgone:
    I have a Hansvedt CNC sinker (Hansvedt Foreman) from 1996.
    It is a simple machine for a CNC sinker...basically a manual spark generator mated to a simple 3 axis motion control...
  6. Replies
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    1,414

    Hi Paul: I can see your point to a degree, but...

    Hi Paul:
    I can see your point to a degree, but there are some things that make me believe your approach may be a lot more frustrating for an EDM beginner.
    Yes manual machines are mechanically and...
  7. Replies
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    Hi again Kevin: Further to my babble above, I've...

    Hi again Kevin:
    Further to my babble above, I've been dreaming casually about how I would do it if it were my problem.
    Here's my first kick at the can:

    I'd mill a rectangular pocket in a chunk...
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    Hi Kevin: If you want to go down this path there...

    Hi Kevin:
    If you want to go down this path there is a fundamental thing you need to give some thought to, and that is how you intend to align your electrodes with your workpiece, especially if you...
  9. Replies
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    1,414

    Hi Kevin: Something I've always wanted to try...

    Hi Kevin:
    Something I've always wanted to try but have never had time to get into, is electroplating electrodes using copper.
    I believe Bud Guitrau's excellent book on EDM shows an example of a big...
  10. Replies
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    1,414

    Hi Kevin: I know silver tungsten is used...

    Hi Kevin:
    I know silver tungsten is used sometimes but I've never done it and I don't know why it is desirable.
    I do know it's expensive.
    My guess is silver is not commonly used because it costs a...
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    Hi Kevin: You asked: "I was wondering about...

    Hi Kevin:
    You asked:
    "I was wondering about copper electrodes. I like that idea much better than graphite. Do they work well."

    Yes they do; here is a shot of a set of mold cavities I just...
  12. Hi again drogus: OK, we have a better...

    Hi again drogus:
    OK, we have a better understanding now of where you're coming from and how the road ahead could look for you.

    Let me begin by describing my own situation briefly:
    I apprenticed...
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    Gentlemen, thank you all for your insights. I...

    Gentlemen, thank you all for your insights.
    I pulled the check valve, brushed the accumulated crap off it it and tossed it into the ultrasonic cleaner.
    All seems to be good again.
    We will keep...
  14. Hi drogus: A couple of considerations about your...

    Hi drogus:
    A couple of considerations about your plan:
    First, I just noticed you're in Germany, and that significantly changes what's available and what it could conceivably cost.
    I doubt you'll...
  15. Hi gkoenig: I was intrigued until I saw two...

    Hi gkoenig:
    I was intrigued until I saw two things in the specs:
    1) they recommend it for cutting wax and plastic
    2) it has a Z axis stroke of only 1.5 inches

    I don't think it's gonna do the...
  16. Hi drogus: If you can embrace the idea of a used...

    Hi drogus:
    If you can embrace the idea of a used machine for little money, you could consider one of the mills marketed around the late 1990's as educational machines.
    Two brands stand out:
    One...
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    Hi coyotebgone: You wrote: "I am surmising that...

    Hi coyotebgone:
    You wrote:
    "I am surmising that a RAM EDM would do a much better job porting a barrel than my VMC."

    So why do you believe this to be true?
    Sinker EDM can do some amazing things...
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    Compressor lugging while filling...diagnosis?

    Good morning All:
    I have a Gardner Denver 2 stage reciprocating compressor vintage 2001 that's recently started acting up.
    When I drain it completely and then fill it, it starts lugging badly and...
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    OK, Kevin, that tells me a lot already. If you...

    OK, Kevin, that tells me a lot already.
    If you are hand carving a master and digitizing it, you've just circumvented the need to get proficient enough with a CAD program to make a file that doesn't...
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    Hi Kevin: How are you planning to create the CAD...

    Hi Kevin:
    How are you planning to create the CAD file you'll need in order to cut the electrodes?
    Will you hand carve a master model and have it digitized?
    Will you learn Fusion 360 or some other...
  21. Replies
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    Wait....there's a Norwegian involved??? Now I'm...

    Wait....there's a Norwegian involved???
    Now I'm confused...I thought we were talking about the pros and cons of chairs in the shop and whether or not it was an Assholish move by management to just...
  22. Replies
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    13,932

    Good morning All: Here's how I see it (further...

    Good morning All:
    Here's how I see it (further to my post #23:

    "new-ish manager above me decides everyone sits on their ass too much, and REMOVED ALL CHAIRS from the shop"

    Management basically...
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    Hi Kamil: Basically there are two ways to set up...

    Hi Kamil:
    Basically there are two ways to set up for subgates. one of which won't work for you because you don't have a full CNC sinker.

    The way that will work for you requires you to tilt the...
  24. Replies
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    Hi All: I believe there's a mentality at work...

    Hi All:
    I believe there's a mentality at work that basically says:
    I (the owner/ manger/ executive/ whatever) only care about one thing, and that's to run everything full tilt at all times and...
  25. Thread: Wire EDM HAZ

    by implmex
    Replies
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    703

    Hi again Radar987: When I was an apprentice...

    Hi again Radar987:
    When I was an apprentice moldmaker, I was taught that a principle to apply whenever possible was to use two different steels of different hardnesses if the components were going...
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