Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: gguidi on November 12, 2006, 12:06:41 PM
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I have a laser running the latest version of Mach III . I have a velocity of 600 and an acceleration of around 80 on the Y and 100 on the X. The x has more weight to move and stop. I would like to cut around 300 - 400 ipm. but I get rounding on the connors. I also have problems with small moves that have direction change. Like a rectangle .080 x 1" the corners angle out. If anyone has any ides let me know. I have 800 steps per inch I tried 1600 but 800 looked better. If I get ou of CV mode it's maks nice conors but is very slow.
Thanks
Gary
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Certainly no expert but from my understanding I think you only have two options
1. Use ExactStop mode (can be Jerky at high speed )
2. Slow down your speed when using CV mode.
When in CV mode your acceleration and decelleration comes into play so corner rounding is a fact of life :(
Changing steps per unit will do you no good as it is the steps per unit that gives you the correct distance travelled, if you change the steps you will get scaling.
Hood
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It runs great in exact stop. This question is for art. Art is there any way to have Mach III switch modes automatically. An example would be if the angle is less than 80 deg use constant velocity if greater than use exact stop. This would be a great help for the high speed machines.
Thanks
Gary
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I think that setting is already there, have a look on the general config page, I am sure I saw something there last time I looked.
Hood
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Just had a look, see pic below :)
Hood
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Just had a look, see pic below :)
Hood
I will give that a try thanks.
Gary
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The version I am running dose not have those settings. I have 1.84.001 What version dose?
Thanks
gary
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That screen shot is from version 2.0x . Go download the latest version. There is also a setting in the (settings screen) called something like angular velocity cv, it is close to the reset button it has two boxes one for entering degrees and another for entering speed and a button to enable it. this does what you are looking for, it will slow the machine down to the speed entered on any angle above a certain degree.
On a side note, i have some questions about your laser. Could you post some pics and a description in the show and tell section?
Thanks,
Chad
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That screen shot is from version 2.0x . Go download the latest version. There is also a setting in the (settings screen) called something like angular velocity cv, it is close to the reset button it has two boxes one for entering degrees and another for entering speed and a button to enable it. this does what you are looking for, it will slow the machine down to the speed entered on any angle above a certain degree.
On a side note, i have some questions about your laser. Could you post some pics and a description in the show and tell section?
Thanks,
Chad
Chad,
I downloaded the latest version. I am not able to find the boxes in the setting screen. I did try the ones in the general setting area. I set it to go to exact stop mode under 75 degs it had no effect it never switched over to exact stop mode. Is this feature working yet? I also get an error that says "i,j,k words missing for arc on line 1053" the program dose not have a line 1053 strange! When I try to run the program it just skips to the end and stops. If I hit the reset button it runs fine. Any ideas?
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is it running in Demo mode?
Check under Help/About and tell me what version you are running
Thanks
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is it running in Demo mode?
Check under Help/About and tell me what version you are running
Thanks
I am not at the machine now but it was downloaded today. I have a license for 1.84 do I need a new one? I will get some info about the machine up soon.
Gary
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Hi, Gary
(do I need a new one?) NO, Just copy your licence "Mach1Lic" to your C:\Mach3 Folder or where ever your Mach3 is located.
Hope this Helps, Chip
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That is odd... you should have what Hood is showing you :)
Could you look under general Config and see if it is there (It should be)
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is it running in Demo mode?
Check under Help/About and tell me what version you are running
Thanks
Brian
I have 2.0.009
Gary
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Hi, All
I have it running well except I can not get it to insert the colant code it the gcode. I have the box checked and for some reason LazyCam will skip some cuts I think it gets the correct path but dose insert the M3 to start the laser
Thanks
Gary
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Post the program and tell me where you think you need to have the M3's
We may have to write a post for you
thanks
Brian
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This issue of corner rounding and finding that sweet spot is something that I need to get a grasp on too. I understand the difference between CV mode and Exact Stop mode and that the acceleration setting for an axis will also come into play. I'm not real clear on the CV Feedrate and what settings to use there. The CV angle to me means that a change in the angle/direction of the toolpath less than the setting would cause a exact stop situation.?
What concerns me is having to (after finding the sweet spot for various tasks) remember to set these properly for each job before I run/ruin said job!
As I see it, if I draw up a part and toolpath it, it should be cut that way, not rounded. Otherwise precision is relative. Exact Stop mode is not an option for most toolpaths (with the exception of longer sided polygons) as it makes for a jerky/jittery machine.
I don't want to come off sounding critical here, it's just an area I'm struggling with. ???
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Mail me off list and I will talk you through it and you can post how it works for all the others :)
Send me your number and I will give you a call
thanks
Brian
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Thanks Brian!
Message sent.
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Hi, Gary and Brian
I'm using Plasma Mode the m3 are fine there, running a Water-jet cutter, m3 on, m5 off.
Just some info., Chip