Messages

281

Tangent Corner / Making of a spindle

« on: November 22, 2006, 12:37:09 AM »

Hello group.
I have my router fitted with a 3.5Hp makita router (9,000-22,000rpm) it works great with wood and plastics. I was trying to mill aluminum last week, and i found it to be a little unsuitable. I couldnt take depths of cut and feed speeds as formulas stated (not even 0.050" depth of cut, cutter fully engaged 0.25" diameter at 30ipm). I think a homebuilt milling spindle would be appropiate. maybe 2,500 to 5,000 rpm would be better with less runout, and more rigidity. What would be needed to make a spindle?

Can I just buy bearings, an R8 arbor, drawbar, collets and R8 collet shank, machine a housing for this and put an AC motor coupled with a timing belt?
Anything else im missing?
I have a travers tool catalog, and I just cant find the arbor and drawbar, do these have to be machined too? any drawings?
Any help would be greatly appreciated.

282

General Mach Discussion / Re: New CV features

« on: November 21, 2006, 11:43:39 PM »

So is this a problem that is isolated to Mach3? or do comercial controlers from big companies like fanuc have to tackle this problem too?
regards
Fernando

283

General Mach Discussion / Re: New CV features

« on: November 21, 2006, 10:32:07 PM »

Brian,
What would a decent acceleration be?
Regards
Fernando

284

Tangent Corner / CAM software with programable 100% cutter engagement feedrate?

« on: November 17, 2006, 02:40:48 PM »

DOes anyone know of any software that has the ability to program slower feedrates when the cutter is fully engaged?
I hate to program feed of 10ipm in aluminum because the cutter cant handle 50ipm cuts when it is fully engaged, but when only 20, 25, 50% of the cutter engaged it can cut at 50ipm, but since the programmed feed rate is 10ipm it takes tooo long to cut.

Regards
Fernando

285

General Mach Discussion / Re: Mach 3 OS?

« on: November 08, 2006, 09:31:28 PM »

Kind of thought it would be a big, no, BIG hassle.
Would be great though.
Ive been living with windows for many many years, I can continue living with it.
Thanks
Fernando

286

General Mach Discussion / Mach 3 OS?

« on: November 08, 2006, 07:50:19 PM »

Hi Group.
Today my control PC rebooted itself while cutting a 5 hour long program, piece was not scraped, but it broke my cutter. When I got back to the mill, there was a dialog box that staid, Windows has recovered from a serious error No big deal.
But it kinda got me thinking, How hard would if be to have a Mach 3 Operating System, A stand alone installation of only Mach 3 running by itself, no Windows, no Linux, just plain old reliable Mach 3.

Regards
Fernando

287

General Mach Discussion / Re: mach2 demo and mach3

« on: October 19, 2006, 10:28:17 PM »

Yes thats right, i think it is also limited to 25kHz

288

Tangent Corner / Re: PC Based Automation

« on: October 15, 2006, 06:11:10 PM »

I guess, i havent thought about that, I'm guessing any would do. I think i like the idea of having a PLC do the controls, and just have a human machine interface, on the pc, and be able to program and manipulate sensor data with the pc also.
Regards
Fernando

289

Tangent Corner / PC Based Automation

« on: October 11, 2006, 07:36:53 PM »

Hi group,
has anyone worked with pc based automation for controlling processes or plants?
Does anyone recomend any good software for this purpose?

Thanks in advance.
Fernando

290

Tangent Corner / max torque or continuous torque for design

« on: September 26, 2006, 09:49:42 PM »

Hello,
When designing for servos, do you take in consideration the max torque
or the continuous torque available from the servo.
For example if you have a setup that would give you 100lbs continuous
force, and say 200lbs peak or max torque, what would you use for
calculations? If the gantry you are moving weighs 100lbs, then the
acceleration you could get using the continuous torque is 1G, if you
use the max or peak torque you would get 2G's.
Any insight?
Thanks in advance
Fernando