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CNC: gantrymMill (CNC router)


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#1 Dennis David

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Posted 30 December 2017 - 05:45 PM

I was not sure if I should even reccomend a machine, fearing people would jump on with suggestions on buying a Taig, Sherline or finding a used Bridgeport!

These are all fine machines and all support milling steel which the gantry type will struggle with. That being said I will reccomend a company that has caught my eye, Carbide 3D Great for small projects like slot cars!

$2499
http://carbide3d.com/nomad/detail/

https://youtu.be/i9MuoYnzy4o

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#2 Ecurie Martini

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Posted 31 December 2017 - 02:18 PM

It all depends on what you need.  Slot cars are not high precision machines.  I know I can't work to a 0.0005" spec.  That said, a comparison of a small traditional mill with the gantry style unit referenced above is interesting:

 

Resolution:  Carbide 3d  0.0005"    Taig  0.000125"   a 4 fold difference

Mechanical Repeatability:   Carbide 3d  0.0015"   Taig 0.0005"   3 fold difference

 

At first reading, these differences appear to be large but, looking for example at the repeatability spec,  what part of a slot car, with the possible exception of the bearings, will be affected by being "off" 0.001"?

 

EM


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#3 Dennis David

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Posted 31 December 2017 - 02:27 PM

And you buy bearings. Plus I guarantee these numbers mean little compared to the errors you introduce with multiple setups and bad practices. I will gladly continue along my path and show everyone how I get on.

As always the proof is in the results. A machine is only as good as its operator. Any machine that makes it easier on the operator is bound to get better results. Or at least used more often.

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