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Type: Posts; User: biglord4ever

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  1. Replies
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    Machining Cast Aluminum

    I've got a job coming in for a bid this week in cast aluminum (customer didn't specify what type or alloy). I've never machined any type of cast aluminum so I have some very basic questions:

    Do...
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    401

    Nevermind. Fixed it. Just needed to...

    Nevermind. Fixed it. Just needed to scotch-brite one of the terminals.
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    401

    Doosan Lynx 220LC- light doesn work

    I recently picked up a 2008 Doosan Lynx 220LC. Everything seems to be in good order, except the work light in the machine doesn't work. This lathe is the type that has the light on always- as in no...
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    So are you saying its impossible to break chips...

    So are you saying its impossible to break chips with HSS drills?
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    I know I could switch to a different drill, but...

    I know I could switch to a different drill, but the point I'm after is that I want to learn how to get better, broken chips with HSS drills. The current job is just an example.
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    Breaking Chips with HSS Drills

    I'm wanting to improve my drilling technique. I run HSS drills- mostly in aluminum.

    So let's look at the current job- 5000 holes with an X drill and 5000 more with a 3/32" drill. All holes...
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    1,104

    Thanks Eric. I've been contemplating a collet...

    Thanks Eric. I've been contemplating a collet system since it was my go to in manual machining.
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    1,104

    Tooling List for Lathe

    I've got a Doosan landing in the shop next week, selling my beloved SB 14.5". Comes with a chuck, tailstock and live center, coolant skimmer, parts catcher, toolsetter. The rest is on me to tool...
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    Full rapids so far. I'll have to try slowing...

    Full rapids so far. I'll have to try slowing them down.

    What speeds and feeds should I try?
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    HELP drilling #15 holes in 316

    I'm blowing up drills (colbalt) trying to drill #15 holes in 316ss. .8 deep. Running rich flood coolant.

    Speeds and Feeds I've tried:
    30sfm, .002 fpr
    45sfm, 002 fpr
    60sfm, .001 fpr, .002 fpr,...
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    I gave up on the old gear pump and ordered a new...

    I gave up on the old gear pump and ordered a new electric pump that'll wire into the machine. Hope to have it back up to normal this week. The bic cup is getting old.
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    I've narrowed it down to the motor. When I open...

    I've narrowed it down to the motor. When I open it up, I see 2 gears and no impeller(s). I assume that means they were plastic and got shredded- then washed out with the coolant.... Best guess at...
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    Unfortunately I can't take the sump and put it in...

    Unfortunately I can't take the sump and put it in water as its driven by the saw's motor via a pulley.

    So all lines are clear, the chip basket and filter are clean, I replaced the gasket on the...
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    1,371

    Both the basket and screen are clean.

    Both the basket and screen are clean.
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    15
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    1,371

    Amada ha250 stopped pumping coolant

    Out of the blue, my amada ha250 stopped pumping coolant. The motor still turns and all the lines are clear.... any ideas of what’s going on? It’s as if there’s no suction anymore.
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    Ran my test this weekend. Original code with...

    Ran my test this weekend.

    Original code with high feed rate- rounded corners, poor detail
    Look ahead M260- less rounded corners than original, still not good enough
    G61- PERFECT!

    Thanks for...
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    Thanks Dave. I plan on doing some experiementing...

    Thanks Dave. I plan on doing some experiementing with this.

    I've been talking with Yamazen as well and they're talking to me about the Look Ahead option.

    I'll post my results once I run my...
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    I sent a batch of sample parts to the Burr King...

    I sent a batch of sample parts to the Burr King test lab yesterday. We'll see what they send back...
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    I was able to get one of the two paths to work by...

    I was able to get one of the two paths to work by reducing the feed rate to 10.1 IPM.

    252675
    (top bad, bottom correct)

    The only things I can think of are either tool deflection or the machine...
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    Now that's an interesting idea! Thanks for the...

    Now that's an interesting idea! Thanks for the suggestion!
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    I currently use a red scotch-brite belt on a belt...

    I currently use a red scotch-brite belt on a belt sander.

    I'm open to other finishes. I just don't want the dull galvanized look.
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    15500 rpm 46.5 ipm

    15500 rpm 46.5 ipm
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    Tool path stopping short

    I have a part that I'm running a trace tool path to engrave some lettering on a part. It simulates fine in Fusion, but on the part, it's stopping just short of finishing the path- maybe .005". I...
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    Tumbler Finish

    I'm looking for a way to speed up finishing post machining in my one-man shop. I currently put a scotch-brite finish on my product line and am happy with the look, but need something faster. I've...
  25. starrett 670 arrived quickly, well packed, and in...

    starrett 670 arrived quickly, well packed, and in good condition. Good communication too!
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