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Alignment Question

ccorrell
I might be overthinking this one. We check various things on Engine Blocks here, and while I was creating yet another Program for a different model today, I got to thinking about the way we align them. Originally we:
  • Rotate Head to Deck Angle (Typically 30 Degrees)
  • 4 Hits on Head
  • Level/Origin to Head
  • 2 Hits for Line in front of Block
  • Rotate XPLUS to Line about ZPLUS
  • 4 Hits in a Cylinder Bore
  • XY Origin to Cylinder Bore
Simple stuff. The part that I am trying to optimize is the opposite side now. Since the opposite side is at -30 Degrees and we have to rotate the head, should I be performing a completely new alignment for the other side? Meaning, repeat the above, but on the other side? Or can I just Level off the deck and Origin off a Cylinder Bore and skip the Rotation?

I guess what I'm getting at is that I want everything to be off of the same Rotation, but I want to make sure everything is taking hits using the right Vectors.

I can also create a Manual alignment "set" for both sides of the Block, but then that introduces issues when I need to check Deck Height, because if I have 2 different Manual and DCC Setups, I would have to perform a Measurement on the Crank Bore twice, for both Sides, which would introduce a lot of extra time.

Thanks all.
Parents
  • I would use the alignment spelled out on the print to the datum structure. On blocks that I check, usually the A datum is the front face, B datum will be the crank bore, and C datum will be two dowel pins/holes on the front face for example. If the bores or other features are dimensioned to ABC then I stick with that alignment while checking those features.

    I've seen a couple prints where the datum structure will be different on each deck face. Where the deck will be the K datum, the L datum will be a dowel hole on the deck, and the M datum will be another dowel hole for the bore features. The other side will have another datum scheme for that face.

    Either way using the alignment spelled out on the print to the datum structure is the way to go. Head rotations won't have an effect, unless they are improperly calibrated
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  • I would use the alignment spelled out on the print to the datum structure. On blocks that I check, usually the A datum is the front face, B datum will be the crank bore, and C datum will be two dowel pins/holes on the front face for example. If the bores or other features are dimensioned to ABC then I stick with that alignment while checking those features.

    I've seen a couple prints where the datum structure will be different on each deck face. Where the deck will be the K datum, the L datum will be a dowel hole on the deck, and the M datum will be another dowel hole for the bore features. The other side will have another datum scheme for that face.

    Either way using the alignment spelled out on the print to the datum structure is the way to go. Head rotations won't have an effect, unless they are improperly calibrated
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