Messages

1

General Mach Discussion / Re: mold making Mach3mill scaling

« on: April 20, 2012, 03:09:08 PM »

Good thoughts BR549 I hadn't thought of the reference point.  
  To simplify my question. If someone sends me a 3d part file and its 1:1 scale. I bring it into my cam system BobCad v24, let it make the code, import code into Mach3. Run it and rough it out as is, then scale it up on the Mach3 "Scale" by my shrink factor, rerun to make a finish pass making it ever so lovely.
Figuring out where the reference point origin is may be like trying to pull a rabbit out of the hat.
So how/what for is the "Scale" feature used in real life applications? thanks rj

2

General Mach Discussion / mold making Mach3mill scaling

« on: April 20, 2012, 01:43:27 PM »

1) If i have code generated for a cavity in a mold thats programed 1:1 with no shrink allowance for when the plastic cools down ,can I use the "scale" next to the DRO to add .010 by typing "1.010" into the xyz scale boxes and will that make my cavity .010 larger in all axis  for the shrink I need VERY COOL IF IT DOES !!!!!
 2) Also if I'm using a .500 diameter end mill cutting out a pocket and I want to be on the safe side of material removal, will putting .990 in the scale boxes make it cut the pocket under size, then after measuring it , set scaling back to 1.000 ,would it make a clean up pass to my end dimensions.
3) I'm thinking the "scaling" feature would be a very easy way of cutter comp without actually having to have it in the program.  And just do EVERTHING 1:1
4) Is that what the "Scaling" feature is for or is it for something else?
I be a knoob with all this so use small words and short sentences please.  Thanks, rj

3

General Mach Discussion / Re: can DRO be used to make closed loop system?

« on: April 17, 2012, 01:11:13 PM »

"Where encoders may be usefull is if you disable the drives on a regular basis as when you do that both servos and steppers will move, steppers will jump to the next nearest full step"
This I use all the time, rj

4

General Mach Discussion / can DRO be used to make closed loop system?

« on: April 16, 2012, 10:22:57 PM »

I have a Taiwan BP with Mach3 and Bob Campells nifty box and stepper motors, ball screws, 3 axis running my mill. Is there a way to use the Newall DRO scales to feedback into Mach3 to make it close looped instead of being open loop now. So that the scales would work like the encoders on servo motors and give true position ?   thanks, rj

5

Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: October 07, 2008, 12:32:51 PM »

I've been a BobCad and Mach user for several years now and must confess I spend more time running my plastic injection molding machines to pay the bills then I do using Mach or BC. I need both programs to make plastic injection molds and barely know how to run either. To busy to sit down and learn them well ,much to my loss. Anyway , please don't delete me cause I don't post much. I need these resources usually at a moments notice and I kinda fly by the seat of my pants cause of my lack of knowing the programs to get through the job . I've converted a Taiwan BP size mill to run with Mach 3. I'm in Walla Walla, WA and have a 1 man Machine shop/ plastic injection molding business for my livelyhood. Anyone else out there making molds with BC and Mach? Take care, Rob