Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: EMPIRE_CUSTOMS on February 27, 2009, 12:55:01 PM
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HELLO MY NAME IS MARK AND I WORK AT EMPIRE CUSTOMS USING A ER ROUTER 5 X 10 TABLE USING A 1650 HYPERTHERM PLASMA CUTTER. USING MACK 3 WITH MP1000THC. WITH THE HELP OF EZ ROUTER WE HAVE FINALY GOT THIS THING GOING BUT NOW WITH THE SOFTWARE RUNING AND TALKING TO THE MACH 3 AND THE TABLE MY CUT QUALITY HAS DROPED DOWN.. THE GUYS AT EZ ROUTER ARETRYING TO FIGURE THIS OUT BUT I NEED TO FIX THIS ASAP.. HAS ANYBODY HAD ANY SIMLAR PROBLEMS? OH .. THE PROBLEM IS MY ARC ARE NOT CUTTING SMOOTH BUT VERY JAGGED .. THEY ARE SMOOTH IN CAD AND IN SHEETCAM AND IN MACH 3 SCREENS BUT WHEN I CUT THEM THE ARC ARE VERY JAGGED LIKE 1/8" THE START A NEW LINE AND NOT AN ARC .. I CAN POST PIC OF WHAT I AM SAYING IF NESCARY.. WE HAVE SLOEWD THE MACHINE DOWN FROM 550 TO 450 IPM.. AND OTHER IDEALS? ??? ???..
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Post a pic and also your code if you can.
Hood
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i will post a pic on monday and code .. i was able to try a different profile and the cut quailty was better but not where it was ..but i will post pics and the tap file is that ok?
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Yes thats fine, just thinking that your arcs in the code may actually be hundreds of small lines. Also have a look and see if your code has G61 in it, if it does then you may want to try replacing that with G64, if neither is in your code then put it in at the start (or via MDI) and see if that helps.
Hood
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(http://<a href="http://s152.photobucket.com/albums/s179/mkhaynesaz/?action-view¤t=0302091033a.jpg" target="_blank"><img src="http://i152.photobucket.com/albums/s179/mkhaynesaz/0302091033a.jpg" border="0" alt="Photobucket"></a>)
(http://<a href="http://s152.photobucket.com/albums/s179/mkhaynesaz/?action-view¤t=leadinandouts1.jpg" target="_blank"><img src="http://i152.photobucket.com/albums/s179/mkhaynesaz/leadinandouts1.jpg" border="0" alt="Photobucket"></a>)
ok and here is the tap file for it.
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(http://i152.photobucket.com/albums/s179/mkhaynesaz/0302091033a.jpg)
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sorry new forum new way to post pics
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It is doubtful that your code will be in arcs, and is probably made up of many short, straight lines, since the only arc available in CNC is a circle.
To mitigate that, you can set Mach 3 to continuous velocity, which is what Hood said. This smooths out the short lines, by accelerating into the next line, before the previous lines has finished.G61 in your code means absolute stop after each line. G64 means continuous velocity.
I don't know what you are using to generate your code, or what system you are using to turn the plasma on and off, but check the code to make sure it is not turning the plasma off after every line.
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i use sheet cam to generate the tap file or the g-code..i know it runs completly with out stops .. is that what u mean or within the code turns off and on ??? ???...
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Your code looks OK I think, please attach your xml file
Hood
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ok i was using the 5x5c-plasma-c .... but i swithched on friday to the 1390 it seems to alot better... but the veins are still there not as bad though
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Dont see anything amiss from your xml at first glance :(
Could it be looseness in your machine?
Have you tried slowing the accel a bit to see if its any better?
Hood
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yeah i droped the speed down from 140 ipm to 110 ipm on some 3/16" running 80 amp consumbles at 90 amps (per ez-router) .. i have even tried it a lil faster with the same results .. i am worried it might be the cpu beacuse this problem didn't start untill i got sheetcam to talk to mach3 .. when i was writing code using lazy cam mill it ran fine .. just took forever to write the code after drawing the part..... ??? ???
i just dont know what to do know. out of ideals
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and i have loosen the bolts to the trannys and re tightened them back up like i was told from ez-router.. thanks for all the help so far guys
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Hello Mark,
All was well with LazyCam ?
Problem started when you switched to SheetCam ?
Maybe it is a post processor setting in SheetCam.
Run a simple dxf through both cams and see if there is a difference in the cuts.
Just a thought,
RC
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tried that the cut quality was the same if i do it in lazy cam or sheet cam .. but today i had a tech come in and look at the machine to make sure that nothing was wrong with the plasma cutter .. we tried something we slowd it to 39 ipm and it looked great i will post a pic here in a min .. but know the circles arent't so pretty i am doing a lead in and lead out using arc any othe ideals i treid using no lead in and just a lead out .. and vice versa
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(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091352a.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091353.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091353a.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091354.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091354a.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091354b.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091354c.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091412b.jpg)
(http://i152.photobucket.com/albums/s179/mkhaynesaz/0304091412c.jpg)