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Author Topic: Arn's minimill cnc compact version  (Read 7336 times)

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Offline Arn

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Arn's minimill cnc compact version
« on: August 25, 2006, 10:25:46 AM »
This is my just completed conversion,  thanks to all who share their ideas and pictures.  I tried to make it compact to fit inside my enclosure so I can flood coolant if I need to.
« Last Edit: August 25, 2006, 10:43:45 AM by Arn »
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Offline Glenn

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Re: Arn's minimill cnc compact version
« Reply #1 on: August 25, 2006, 11:27:08 PM »

Arn, good looking machine, what size motors are on your axis, oz/in. ?
Glenn
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Offline zarzul

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Re: Arn's minimill cnc compact version
« Reply #2 on: August 28, 2006, 10:54:15 AM »
Glen,

Thanks for the feedback,  I am using 270 oz motors, the belt drive hidden under the cover is a one to one ( no reduction on the x & y)  the Z which is a 5 turn/inch ball screw is belt driven with about a 2 to 1 reduction on the belt pulleys. 

Arn
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Offline fignoggle

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Re: Arn's minimill cnc compact version
« Reply #3 on: September 27, 2006, 10:09:52 PM »
hi arm-

looks good! did you also make a y-axis bearing block?
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Offline zarzul

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Re: Arn's minimill cnc compact version
« Reply #4 on: September 28, 2006, 04:56:22 PM »
Fignoggle,

Thanks for the reply,  yes I did make a y-axis bearing block,  I went kinda cheap with it though.  I just used 2 ball bearings and preloaded them to each other by shimming between the outer race.  This didn't leave much room on the stock leadscrew, just enough to get the pulley mounted.  Next time I take it apart to adjust or tune things I will take some pictures incase someone wants to do something like it.

Arn
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Offline fignoggle

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Re: Arn's minimill cnc compact version
« Reply #5 on: September 28, 2006, 05:02:31 PM »
Quote from: zarzul on September 28, 2006, 04:56:22 PM
Fignoggle,

Thanks for the reply,  yes I did make a y-axis bearing block,  I went kinda cheap with it though.  I just used 2 ball bearings and preloaded them to each other by shimming between the outer race.  This didn't leave much room on the stock leadscrew, just enough to get the pulley mounted.  Next time I take it apart to adjust or tune things I will take some pictures incase someone wants to do something like it.

Arn


hi arn-

that'd be great - always nice to see other x2 conversions :)

our y-axis block looks like this: http://www.fignoggle.com/machines/x2mill/howTo-upgradeScrewNutY.htm

are you using split nuts on the acmes on the x/y axes?
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Offline zarzul

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Re: Arn's minimill cnc compact version
« Reply #6 on: September 28, 2006, 05:34:11 PM »
Fig,

Yours looks a lot like mine, I must of gotten an idea or two from you.  Mine is a two piece construction also, the bearing holder is machined down to allow plenty of clearance for the y travel,  it is a little larger diameter so I have room to attach my motor mounting plate which also holds the bearings in place.  I haven't tried the split nut idea yet,  I am giving it some thought though. 

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