Thread: Converting a Warco Mill to CNC
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24-12-2014 #1
i definately need a milling machine in my life.
no further comment.
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24-12-2014 #2
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25-12-2014 #3
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25-12-2014 #4
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25-12-2014 #5
Jazz, what brand of servos are you thinking about using?
CNC routing and prototyping services www.cncscotland.co.uk
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25-12-2014 #6
i've got plans to throw HSD router heads on two (24k rpm 6.8kw bt30 atc), a slotting head on the third and keep a low speed head for steel work on the forth. Great machines and mega value.
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29-12-2014 #7
Thanks for all the help with the suggestions and advise.
I have made some progress :). I have decided to go for the Nema 23 from zapp 3.0Nm for all axis'. I have also chosen to only control the x,y slides and the quill hand-wheel. I have chosen the Quill rather than the knee due to many reasons. The main problem is that there is a lot of slack between handwheel and the actual movement of the knee, the only way to fix that would be to change out the gear. Due to money and time being a major factor in this project I decided to say clear of that. The way in which I think the machine will work is by lowing the quill about an 1" or depending on the max height for clearance and then bringing up the knee to meet the work piece to the tip of the cutter. Once I have raised the knee manually, I would lock the knee and then all the z operations would occur through the quill. I am aware of the problems with lowing the quill on such a small machine, however Im prepared to bare with the limitation that would ensue with opting for the quill option.
As i mentioned earlier I will be buying the Nema 23 from Zapp
http://www.zappautomation.co.uk/sy60...per-motor.html
and my fav ZP5a-INT
http://www.zappautomation.co.uk/zp5a-int.html
using the AM882 Driver
http://www.aliexpress.com/store/prod...570168083.html
and a custom power supply.
I will be using rectangular box section for the mounting system between the stepper and the axis
http://www.ebay.co.uk/itm/281145148732?var=580212490514
For the xy and I guess z depending on if I operate the z through the quill or the knee i will be using (16:48) stepper: axis drive however I could go for (14:60) for the knee.
http://www.beltingonline.com/timing-pulleys-bars-272/
Im also looking for a NEMA Wall mounted like Enclosure to mount everything inside however Im not having any luck.
Any suggestions or views on the knee Vs. quill would be very helpful. Suggestions on removing the slack between the hand-wheel and the actual movement of the axis would be awesome too :).
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29-12-2014 #8
I think one of the problems with the quil and the knee is the backlash in both drive trains. Most of these machines I've seen CNC'd have some kind of external bracket with ballscrew that grips the quil and ensures there's little to no backlash. Some use direct to quil but i think often they get modded to use a ballscrew to get around backlash.
Like you say the Knee is just raised by hand to some level near what's required befroe starting job.
When you say NEMA case what do you mean exactly.? I use these http://www.tlc-direct.co.uk/Main_Ind...res/index.html
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