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Persistent issue machining aluminum wheels - white spots / mottling

Thanks for the feedback. Any idea how they deal with it when it does come up for them?
- Rpi
- Post #39
- Mar 16, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

Hi, PM sent, but I'm in Toronto, Canada.
- Rpi
- Post #34
- Mar 14, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

Thank you very much!
- Rpi
- Post #32
- Mar 14, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

This was one of my theories, but then how would I prevent this? No matter what, since at every turn at a certain spot of the wheel, it will be picking up some poop pile no?
- Rpi
- Post #30
- Mar 12, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

Thank you. I've tried a larger nose radius (333 size if that makes sense), which is the size that was recommended to me by another rim shop. I cam understand that some may be inevitable but I can't imagine (and know for a fact) that the severity of what I am getting is normal, nor would I...
- Rpi
- Post #22
- Mar 11, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

The machine is specifically built to do wheels, and frankly is quite easy to use - digitizing is done with a probe and the default parameters for RPM are based on rim diameter which is inputted into the system for each wheel. All the parameters they know and use are already set up and we have...
- Rpi
- Post #21
- Mar 11, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

I have ordered some single crystal diamond inserts to try, but I think its way overkill as they are 4x the price of PCD and 20x price of carbide and I can't imagine everyone else in the rim repair world is using those. Interestingly, I did a set of Porsche wheels today and noticed that the...
- Rpi
- Post #20
- Mar 11, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

My reply posts are not getting posted for some reason. Edited original post. Thanks!
- Rpi
- Post #15
- Mar 10, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

It looks like my long response post is not going to get "moderator approval" anytime soon, so will try writing responses again. Thank you everyone for trying to help! Dualkit: - Sorry, I don't know what surface feet is? Feed rate is constant and controlled by the machine, but as above, I've...
- Rpi
- Post #14
- Mar 10, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

I've tried responding to all above comments, says mods have to approve so will wait for that to happen, but have done dry, diamond and big nose radius, no difference.
- Rpi
- Post #10
- Mar 9, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

Thank you everyone for the responses. Response to above questions: @dualkit - I'm not sure what surface feet is, sorry. Can you please clarify? - re tool nose radius, I've tried 331, 332 and 333 (160404, 160408, 160412) - feedrate doesn't change through cutting process, but RPM does - the...
- Rpi
- Post #8
- Mar 9, 2020
- Forum: CNC Machining
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Persistent issue machining aluminum wheels - white spots / mottling

Hi everyone, New user and brand new to the machining world. I have a new CNC lathe that is a wheel specific machine – it is made to refinish alloy rims. We are in the rim refinishing business and we only machine alloy wheels. The machine is new, and we and the manufacturer have been trying to...
- Rpi
- Thread
- Mar 9, 2020
- Replies: 43
- Forum: CNC Machining