Messages

11

General Mach Discussion / how to set A-axis to move continuously,not in steps?

« on: September 16, 2010, 06:11:31 AM »

hello,i have stepper motor on my 4th axis(2 deg/per step,written on it)and its always moving in steps,can it be set to move continuously?

                                                                                                                                                                               Motor is directly connected to  chuck,no transmission.

..Also,it makes 4 steps to make 1 degree,is this  minimal movement for this motor or it can be set to make smaller steps for better detail?

12

General Mach Discussion / Re: problem with z axis

« on: September 16, 2010, 05:30:50 AM »

Try with a G61 at the start of the code and see if it works, if it does then it is likely due to a fairly slow acceleration. You could try messing with the CV settings on General Config but test out with Exact Stop (G61) first to make sure that is the issue.
Hood

Thanks Hood,i wrote G61 in g-code and now its making right angles even at 500mm/min. Can I set this somewhere in settings so i dont need to edit g-code every time?

13

General Mach Discussion / problem with z axis

« on: September 15, 2010, 05:14:42 PM »

hi!..or better....HELP!..  I have a problem with z axis when its running at higher feed than 2 ipm! It happens  that every time that z axis should finish moving up or down,the  x or y movement starts before z finished its work,so result is that  edges r cut off when z was going up,or edge is not 90 degrees but rounded when z was suppose to go down and  stop so x or y would continue...

i made a 3D model,just a simple wall,0.1 inch high and 0.1 inch thick,and i made g-code for that in artcam..so the tool coming from left approached the wall,stopped,went up,but before it reached 0.1inch in z ,the tool started to move horizontal so it cut the edge(made it rounded)..than tool continued as it should over the wall and it stopped as it should,than it started to move down 0.1inch but again before it reached the end,the tool started to move to right(z still doing its job-so it produced curved edge again).this was happening at feed rate-8ipm and plunge rate-4ipm.it dosnt happen at 2ipm.

Than i rewrote those 5 moves of g-code and i loaded them using TEACH mode in mach3,adding 4ipm feed for horizontal and 4ipm for vertical moves as in original g-code. Now for my supp there was no rounded edges ,the z axis would finish its job  before x axis started to spin.                                                                                                                                                                            

anyone have idea whats going on?what can i do to achieve sharp edges  at high feeds ?why its different result when i make  g-code and load it using teach mode?

14

General Mach Discussion / Re: Z Axis Drifting or Loosing Steps?

« on: September 15, 2010, 04:21:55 PM »

hi,i had similar problem with y-axis,after i finished job  ,the tool was  always few milimeters off the zero,my problem was the rubber conection  that was holding screw and motor together.i realized that after someone suggested me to run my y axis at extra slow speed,and there it was,motor was running but  tool didnt.

15

General Mach Discussion / Re: switching X and Y axis

« on: July 19, 2010, 05:21:41 AM »

this is my current situation if this helps..

16

General Mach Discussion / switching X and Y axis

« on: July 19, 2010, 04:49:22 AM »

hello, i have my 4th axis aligned with Y that makes me problems to make g-code...so i want to swich  my X axis to become y and Y to become x axis so  my 4th axis would become aligned with x-axis... my 4th axis  is heavy so i dont want to  move it to current  x axis but i rather fix it  outside machine  and let spindle move in current y direction.. so i wonder,can i do this in mach3? where i can switch those 2 axis? beginer here...thank you

17

General Mach Discussion / Re: True 4 axis milling

« on: July 19, 2010, 04:33:30 AM »

hi,i was in same situation as you when i bought MeshCAM,its great softwer for that  money but does only indexing as u mentioned...now i try to use ArtCAM for 4th axis,my other options were   MadCAM (if u use Rhinoceros) and DeskProto

18

Third party software and hardware support forums. / ArtCAM-Mach3-4th axis postprocessor

« on: June 12, 2010, 07:03:26 AM »

Hello, i am trying to  get a 4th axis toolpath in Mach3. i made a ring in ArtCAM,i made g-code by using few postprocessors(for mach2,mach3mm,model master4th axis  rotary...) but none of them made a rotary toolpath in mach...the g-code contains A axis but on toolpath screen its flat or its not anything like it should look....   anyone can help?thank You??? 

19

General Mach Discussion / fourth axis problem

« on: April 06, 2010, 08:32:49 PM »

hi everyone,i have a problem with my fourth axis.....when i write in MDI to rotate it  90 degrees,  it makes 90degrees in mach but in practice it makes  a move of  ..like 98 degrees.......        where can i set that in mach3,so taht 360 will make it do exactly  the full circle.. ?       thanks               Miroslav

20

General Mach Discussion / Re: constantly losing "zero"

« on: March 16, 2010, 01:17:54 PM »

i found 1 cause of problem....as Ethos sugested to run slow from 1 position to other i did that and what a suprise,,,y axis mnotor was turning but ax was not spining,,that happened only in 1 direction and at low feedrate,,..so that explains why i got romboids instead of rectangle..and explains why some jobs didnt have problem,its cos once i did toolpath alongx and once along y.........................           but today while i was doing along  axis toolpath(what was good) occured problem ith z axis that i dont see while checking x axis motor  and axis spining....  problem was that every time the tool had to go into material  under right angle,the tool would  stop(for a while but semed too long) and than entered 90 degrees down  as it should..after cleaning lowr surface it was sopose to rise to z zero and continue,but just before it got to zero z level ,the x axis would start its work ,so z ax would be doing its last moves up and x axis its 1. moves..that resulted cutting an adge...it seams that  z axis is "late" or x axis is few steps " a head in time"....that happens when i put like 100mm/min and its non existing  at 4 times lower feed...any1 have idea whats goinng on?