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How to control size of tiny chamfers/edge breaks on internal features such as small drilled holes?
We don't have an optical comparator unfortunately. -
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How to control size of tiny chamfers/edge breaks on internal features such as small drilled holes?
Yes, it's all in one op. We have sub-micron resolution and extremely good repeatability on this machine (gang tools on a swiss lathe), so I'm quite confident that once we get it dialled in it'll be able to hold that just fine. -
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How to control size of tiny chamfers/edge breaks on internal features such as small drilled holes?
I don't think we have the space for that within the part, and I'm not entirely sure how we'd validate the conical element for the gauge either, or make sure the chamfer is not too deep. -
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Nakamura WT 250 vs WT300
Pretty sure most if not all the Nakamuras are belts. They're a bit slower to accelerate/decelerate than the direct drives from Okuma etc, and the C-axis is slower and maybe less precise as a result too (although we get pretty good surface finishes milling in C on ours).- Springy
- Post #29
- Forum: CNC Machining
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How to control size of tiny chamfers/edge breaks on internal features such as small drilled holes?
Does anyone have a good method for measuring or gauging the size of small chamfers/edge breaks on the entry to small holes? Hole in question is 0.09375" (3/32" or 2.38mm) diameter, drilled blind hole. Chamfer needs to be kept small and it needs to be consistent across part runs to within about... -
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Fusion 360 WCS issue?
For future reference, this is a common problem with parts like this, that are mostly a revolved profile but also has some asymmetrical machined features. What humans call the centerline of that part is the revolve axis, ie the center of the axisymmetric/turned features. Where Fusion considers... -
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The lights out checklist
So if I understand correctly, the new team that you're preparing this lights-out proposal for has 600 SKUs (and so I understand, by SKU we mean individual part number requiring its own program and its own setup)? So across all machines you need about 2.4 setups/day, 5 days a week on average...- Springy
- Post #22
- Forum: Robots and Automation
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Switching from Swiss to ST20Y??? Any gotchas I'm not seeing?
Yeah the setup time on the swiss machines sucks, and they're about as versatile as a can opener. Our turning centre gets more parts done per year than our swiss machine for that reason - it's much faster/easier to set up and get running, and infinitely less frustrating, like it's actually rare... -
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Switching from Swiss to ST20Y??? Any gotchas I'm not seeing?
The swiss will be about 3x faster than a normal turning center of that size for most things. Every single thing is faster on the Swiss, often by a lot - the bar feeding on our swiss (IEMCA Ideal 325) is a total of about 1 second, on our turning center (LNS quickload S2) it's more like 5-6... -
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The lights out checklist
Really gotta tie this in to your volumes here too. If these parts are running at high volume (which to me means >10k parts/year) in continuous production full time (ie not in batches) then this level of detail makes sense. If not - or if other systems can get the job done much faster and...- Springy
- Post #12
- Forum: Robots and Automation
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Profile honing butted ID? Is it a thing and if so what's the process?
A 3/4” carbide boring bar won’t cut 10” deep without crazy chatter, even a damped 3/4” won’t (we already have one). OD is about 1.400.- Springy
- Post #10
- Forum: Abrasive Machining
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Profile honing butted ID? Is it a thing and if so what's the process?
Yeah I was thinking along those lines, but was wondering if anybody made tapered-to-cylindrical honing stones. I don’t even think ID grinding could do it very effectively, you’d have crazy L:D still.- Springy
- Post #7
- Forum: Abrasive Machining
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Profile honing butted ID? Is it a thing and if so what's the process?
Material is 7000 series alu. It’s not blind, it’s a tube, but one end is thicker than the other, the taper/butting is a noncritical aspect that joins one tight tolerance larger diameter and one medium tolerance smaller diameter together. I had considered drawn and butted tubing and then just...- Springy
- Post #6
- Forum: Abrasive Machining
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Job opening - experienced CNC turning specialist in Kamloops, BC, Canada
Job opening - Kamloops BC, Canada. Looking for experienced & ticketed machinist for a role beginning this winter (date TBD but likely December or January). Ideally you’d have experience with: - Turning centres (single and/or multi turret, twin spindle, live tooling) - Setup, operation...- Springy
- Thread
- Replies: 0
- Forum: Career Opportunities
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Profile honing butted ID? Is it a thing and if so what's the process?
Anyone got any experience with honing of ID profiles? What I'm specifically looking for is a way to hone a mostly cylindrical profile that gradually tapers (about 1.5 degree taper) about 2/3 the way into the bore. It'd have about 10" depth of bore with a cylindrical profile, about 1.250...- Springy
- Thread
- Replies: 9
- Forum: Abrasive Machining
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Peck drilling cycle questions - G83/G83.6
Thanks Max, however this is an issue we run into often enough now that we'd like to find a better way than hand-coding peck retracts. In some cases we'd have to manually write out hundreds of lines of code to do so, it's just not feasible because if/when we find we want to play with the pecking...- Springy
- Post #5
- Forum: CNC Machining
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Peck drilling cycle questions - G83/G83.6
Fanuc 0i control, trying to work out how to get a peck drilling cycle in our lathe that is defined as follows: Z0. is the surface plane of the part Any Z negative moves (eg Z-1.000) is inside the part boundary A slightly larger hole is predrilled to Z-1.000 We want to rapid in close to Z-1.000...- Springy
- Thread
- Replies: 8
- Forum: CNC Machining
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Correct way to call out a hole inside a recessed feature?
Thanks. There is a model in this case but we want to get the print right regardless. Thanks, this is exactly the kind of info I was looking for! -
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Correct way to call out a hole inside a recessed feature?
Three reasons I can think of: 1. Because in some cases the bore would be large enough in diameter and the drilled hole small enough in diameter, that measuring down from the datum plane would be very difficult (not necessarily feasible to directly measure - we don't assume these prints are going... -
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Correct way to call out a hole inside a recessed feature?
Tried googling and didn't come up with much on this. Say you have a flat-bottomed bore that's 1.000" diameter, 0.750 deep from a flat top surface which is used as Datum A. Inside that bore, you have another feature, which is a 0.250" drilled hole (eccentric to the bore), that is 1.250" deep from...