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| Another homemade milling machine |
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| shipto:
Won't want to removed it there's nothing I need to do from inside. The only advantage of being able to remove it would be weight but once it's in place it would be my kids job to get rid of it 😃 Sent from my SM-N910F using Tapatalk |
| mattinker:
If you want weight only, lead! Regards, Matthew |
| shipto:
It's not just weight it's helping rigidity too. However as I have said I won't make a decision until it's running and I have tested to see if it's needed, fingers crossed it won't need anything extra. Sent from my SM-N910F using Tapatalk |
| PK:
--- Quote from: mattinker on April 18, 2017, 06:32:14 AM ---If you want weight only, lead! --- End quote --- In my experience.... Mass is the main advantage. Particularly on a small machine as it reduces the resonant frequency of the structure below the excitation frequency of the spindle+tooth count combination. This resonance (and some terrible engineering in the case of the X3 mills) is what causes the most grief, and it's why the 20KRPM Chinese spindles for chump change have revolutionised the CNC router business. They increase the excitation frequency above the resonant frequency of even the tiniest mill But there are others. When the structure is made up of parts of different densities, a portion of energy that travels through it as waves (rather than displacement/vibration) is reflected at each interface. This forces a portion of these waves to travel long paths and get absorbed by the substrate. |
| awemawson:
Blimey PK that's a bit impressively technical :bow: |
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