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Messages - RICH

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7021
LazyCam (Beta) / Re: PCB dxf conversion problem
« on: October 10, 2008, 08:26:28 PM »
Almaz,
Took a look at the DXF in two different CAD programs. I could probably redraw it quicker for a better DXF import into Lazycam. I say that, only in light that Lazcam would generate outline profile cuts ( i never did a PCB so excuse the lack of knowledge). There are lines, fill / cross hatching, extra liines, unconnected segments, you name it in the DXF.
BTW, the linestrings in CAD are not boxes but actually closed shapes if you get rid of the cross hatching boxes. I can't speak for the programs you mention, but will say, that all programs do not DXF out and import equaly.

So no answer specificaly to your programs, but suggest you may check and see if there are some settings for DXF'ing the file out of those programs for an improved import to lazycam.

Take a look at Dave's recomended topic link as there is some specific info in there for PCB gcode file generataion.
RICH

7022
General Mach Discussion / Re: Help converting dxf file
« on: October 10, 2008, 08:00:56 PM »
Almaz,
I'll take a look and should i have any comments will post in the original topic.
RICH

7023
General Mach Discussion / Re: help Me
« on: October 10, 2008, 07:01:38 PM »
djjroo,
Are you trying to cut an outside contour of what is pictured?

7024
General Mach Discussion / Re: help Me
« on: October 10, 2008, 06:41:26 PM »
Hood,
Attached is a dxf and screen shot of djjaroo's gCode he posted.
Should be of help in the communications.
RICH

7025
LazyCam (Beta) / Re: Help with reversed order entities
« on: October 10, 2008, 12:25:02 PM »
Sage,
Not yet, just continue hacking away your doing great and educating me.
RICH

7026
LazyCam (Beta) / Re: Lazy Cam pain
« on: October 09, 2008, 09:24:45 PM »
Spnar,
Looks like your making good progress. I also have my honey do's to do.
I have not had much luck in manipulating the entities, maybe way off course in what i was trying to do.
What program are you using to generate the DXF file or create the profile? I ask because it's 3D
and had to do a couple of conversions to get it to 2d and imperial units.
Rich


7027
LazyCam (Beta) / Re: Help with reversed order entities
« on: October 09, 2008, 09:00:23 PM »
Hi All,
Just on the side trying to learn something about those "entities" which may apply to the turn part of lazcam.
So nothing to add in here, but, may ask a question while you guys are active. Hope you don't mind.
 RICH

 

7028
General Mach Discussion / Re: speeding up my 4th axis rotary table?
« on: October 08, 2008, 10:31:56 PM »
panaceabeachbum,
I just assume that rotary table is driven by a stepper.
As a steppers speed increases the torque decreases. You need a certain amount of torque to turn the rotary table.
For example, suppose your stepper can run at 500 rpm and has adequate torque at that speed to turn the table without loosing steps, for discussion, if there is a 50:1 gear ratio then your table can turn 10 rpm max ( you can convert to inches per unit if you wish). You can change the reduction ratio and increase rotary speed or you can get a stepper that will run faster with adequate torque for some desired rpm or a combination of both. But as you know both have practical limits.

I may be wrong, but believe MACH reverts to the lesser speed of the two or more axis's on circular paths.
RICH

7029
General Mach Discussion / Re: PCB Isolation Milling using LazyCam
« on: October 08, 2008, 07:21:08 PM »
Hi Bill,
Some were i saw a program for just doing boards and it was not that expensive. Not sure if it was here or the
internet. i would guess the Internet and it may have been shareware . The point is ,that you have something all setup which would save you time and the g code could be run by Mach.
As far as lazycam is concerned, you'll need someone who has used it for milling. I just use it for turning.
RICH

7030
Tim,
Check out the posts on WHAT I MADE WITH MY CNC EQUIPMENT in here . There is a guy who is making some really
super turnings  and I am sure he would have some good advice he would share with you.

Like Hood say's ball screws, linear slides and grease brings visions of binding. Not good.  Acme screws may actualy be better. For any electrical device like a computer, controller, etc. i would recommend tight sealing and positive pressure / sweep so that you are not sucking dusty air in. Think about the tooling you will use as there are diferences in overhang /mounting, depth, width, and shape of the tooling you will use. Assume that you want the bull work done along with copying so that only fine finishing by hand will be done, so you want to be able to get the tool and slide out of way. Trying to mimic a knife cut / not scrapping cut and your into maybe 3D stuff .
STOP for  a long moment and think about what safety you want in place when doing say a wooden queen ann leg. Ask yourself what are the differences that i am dealing with verses a metal lathe.
Just some thoughts,
RICH
PS: Buy a good mask as some of the exotics are really nasty and you don't want to find our the hard way that your allegic to the wood.
 

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