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Generally, the bigger the motor, the slower it goes. If you want to go faster, use smaller motors. You'd probably get pretty good performance from a G540 and 380 oz steppers. The only issue you might have is acceleration.
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This is my bridge mill design concept.
I already have the base plate which is a welded aluminum structure 28"x67" with a 1" top plate and 1/2" double "x" pattern for support. It has been stress relieved and blanchard ground top and bottom.
I have all of the linear rails which are thk hsr25's as shown.
I also have the x plate which is surface ground steel 1" thick and weighs approx 120 lbs.
I will need to fab the uprights(3"1/4 wall tube) and the "y" cross beam (6
" channel)
The y axis plate and z axis plates will be aluminum.
So I was thinking of ordering a ball screw package off ebay from linearmotionbearing which comes with 3 5mm lead screws nuts and bearing blocks with ends machined on the screws.
Gecko drives and stepper motors in the 640oz in range.
This is where I am not sure what to do. I plan to machine aluminum and softer materials like wood and foam. Do I need bigger motors to run cutting at 120ipm and rapids at around 400ipm? I may load the table with a bridgeport vice which is about 75lbs but am not sure. I really don't care if its not really fast as I am use to cutting with huge old duplicators that are maxed out at 60ipm cutting.
As for a spindle I am not sure if I will use a wood router or build my own spindle yet.
Any suggestions would be appreciated,
Thanks Kevin
Generally, the bigger the motor, the slower it goes. If you want to go faster, use smaller motors. You'd probably get pretty good performance from a G540 and 380 oz steppers. The only issue you might have is acceleration.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Thanks for the reply....I was not thinking that a small motor like that would move such a heavy x axis load. The Gecko 540 drive looks really neat and complete. That would make things easier with that drive.
Kevin
You really need to do the calculations to see home much force you need to move at the speeds you want, and what motor will give you that force. I don't know for sure that that drive/motor will do that.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
I wanted to do the calculations but I cannot find the .xls sheet that one of the members posted. I don't want to spend money where I don't need to or buy something that will not work or I cannot make it work. So if anyone can direct me to that document I would appreciate it. I did download the parker dos program but cannot make that work on my xp computer for some reason.
Kevin
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