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Messages - DAlgie

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201
General Mach Discussion / Re: CNC lathe
« on: May 20, 2007, 12:54:03 AM »
I'll have to admit, the toolpath display is not ALWAYS correct, you can get some quirky stuff there at times, but quite often it is an arc that has the wrong IJ, or direction, etc. If the part you are trying to machine is quite simple then the toolpath display will probably be right, but if it's complex, just trust your code and go with that. On another point, have you tried the wizards yet? These are great for 75% of the parts you might need to machine, you can combine different ones into the same code as well. You'll find the one thing missing is a G71 roughing type canned cycle, this will rough out an arbitrary shape you call out. You can post a DXF into it and it will post out the code for the profile, but it's not much use without some way to rough it out first.

202
General Mach Discussion / Re: CNC lathe
« on: May 19, 2007, 06:03:22 PM »
Post the program on here and we can take a look at it. if you click on the graphic display partion of the screen you can then zoom in, use your scroll wheel on the mouse, and also pan the view if needed, try it and you'll see it's very nice to use. I use the "Silverblue" screenset available on here, same controls but a much nicer display.

203
General Mach Discussion / Re: Changing processor speed
« on: May 19, 2007, 12:24:40 PM »
Thanks Hood. This is an odd CPU I think, it's an XP2800 with a 266 FSB, normally the highest speed processor with that bus speed was a 2400. I bought it for my main computer but it seems to be a problem for it, it gets to the windows load screen with the little moving bar, and then the bar movement freezes. I think it's actually a 333 FSB chip, you never know what you get on Ebay... ANYWAY, the motherboard on my Mach3 lathe has a changeable bus speed, so I thought it might work there, but I have no real reason to use it on that computer though, just buyer's remorse and the human need to upgrade everything....
                                                 Dave.

204
General Mach Discussion / Re: CNC lathe
« on: May 18, 2007, 01:55:50 AM »
All sounds very nice! As a bit of caution, when you get a quick change tolpost and toolholders, be careful to take the time to learn how the lathe too offsets work on Mach3. It's not that straightforward at first and you can cause a crash if you're not sure how it's set up. A bit more complex than Mach3 mill I'd say, reply back here when you're ready and I can help if needed.
                                                    DaveA.

205
General Mach Discussion / Changing processor speed
« on: May 18, 2007, 01:46:11 AM »
Will a change in computer processor speed affect Mach 3 in any way? I have an AMD XP1900 now and may change that to an XP2800. and have the machine and software set up and working well. Wondering about the timing or anything like that, don't want to mess it up in any way, if it will change anything I will leave the processor as is.
                                                                DaveA.

206
General Mach Discussion / Re: CNC lathe
« on: April 29, 2007, 12:43:32 PM »
Understand about not having the time to convert a lathe over to CNC control. Maybe then it comes down to improving the thing as you go, make a sheetmetal cover for the ballscrew, remount the X axis motor when you have time, etc. As Dan said, I would also like to hear about your experiences with this lathe, keep us posted please.
                                  DaveA.

207
General Mach Discussion / Re: CNC lathe
« on: April 29, 2007, 11:41:11 AM »
The Syil lathe, I looked at the pics, not all that impressed. The X axis stepper motor is just hanging out in mid air, and I mean WAY out there, they say about covering the steppers to protect them from "Fritters". I imagine they mean chips, yet the Z axis ballscrew is completely exposed to chips. It can't be running in closed loop, very few do. Steppers look like they might be sized right.

208
General Mach Discussion / Re: mach 3 and motors a {Newbie Post}
« on: March 23, 2007, 10:20:44 PM »
My lathe is similar size to a Student, I used a 400 oz/in on the X axis at 2:1, plenty of power. I used a 1200 oz/in on the Z axis at 1:1, it has enough power but my voltage is a bit low I think at 48 volts. I get a rapid of about 55 in per min at that. I did the 2:1 on the X axis and 1:1 on the Z so that with 10X microstepping and .200" ballscrews I would have .0001" resolution on both axis, the X needing twice the normal because of the diameter change. Just remember, the Z axis needs at least 3 times the power that the X does, much more weight to accelerate there.

209
General Mach Discussion / Re: temperature alarms for motors?
« on: February 09, 2007, 12:43:23 PM »
Yeah, I wouldn't actually spray coolant on the motors I don't think, recipie for disaster. Mine are fabricated aluminium jackets that cover three of the four sides as you see, and I added a small radiator and fan to the system as well.

210
General Mach Discussion / Re: temperature alarms for motors?
« on: February 09, 2007, 01:39:02 AM »
Or run a coolant jacket like I did on the Y axis motors on my router. I use the spindle coolant system, this probably halves the motor temps.

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