Machsupport Forum
Mach Discussion => Mach4 General Discussion => Topic started by: SEREGIUS on November 26, 2018, 05:08:01 AM
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Hi,
Search in the forum does not work, write to the old forum messages, an error appears.
http://forum.machsupport.com/forum/index.php/topic,34966.0.html
http://forum.machsupport.com/forum/index.php/topic,35121.msg241239.html
I again had a problem with cv.
I made a new car, Mach4_3835+ESS+Servo HIWIN.
The maximum speed of 55,000 mm / min, acceleration of 20,000 mm / s / s.
Now installed 40,000 mm / min, acceleration 1500 mm / min (test and tuning ...).
To configure CV I use mcCvTuningWizardBeta3 . This version is recommended as the latest and there are no errors. (I can not find the topic on the forum, the search does not work.)
I have been looking for the cause of the problem for a long time and it seems that I have found it.
If the circle consists of two halves, Mach4 distorts the trajectory (Mach3 does not distort).
If the circle consists of one circle, Mach4 does not distort the trajectory (Mach3 also does not distort).
How to set up Mach4 for it to work?
Photo cut, files Gcode, settings added.
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G-Code
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SEREGIUS,
On the CVFeedrate in machine.ini.
mcCvTuningWizardBeta3 produces high number in on the lower angles this causes issues with some CV output.
I automatically change the high numbers to a set lower value, so all the high values are reduced the same lower value.
This produces a lot better profiles down to 1mm lettering.
Give it a try.
Regards,
Mauri.
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Mauri,
Better to use mcCvTuningWizardBeta3, or other Wizard?
What to change in mcCvTuningWizardBeta3 so that it produces lower speeds immediately.
I found the string [CV Feedrate]. The first 10 lines:
Angle_0=56568.000000 (The maximum speed is set to 40,000)
Angle_1=37642.000000
Angle_2=18821.000000
Angle_3=12547.000000
Angle_4=9398.000000
Angle_5=7518.000000
Angle_6=6248.000000
Angle_7=5359.000000
Angle_8=4699.000000
Angle_9=4165.000000
Angle_10=3759.000000
What speed do you recommend setting?
In machine.ini there is a line [CVBlendRadius], what does it do?
I added a file machine.ini.
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SEREGIUS,
Enter a maximum for the CV Feedrate of 1500 from Angle_0=1500 to Angle_24=1500 and see if it makes a difference.
I use HiCON and Mach4 V3804 and it cuts a circle fairly accurately.
Mach4 V3481 and V3804 both do a good circle and both of these two programs are rock solid.
Are you using R or I/J or X/Y in your G-Code?
What are you making to run your machine so fast?
Regards,
Mauri.
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Mauri,
Files containing GCode posted in post number 2. 1359.TAP - no problem, 1360 - problem.
The lines of Gcode look like this:
M03
G01X60.64Y105.40
G03X60.36Y15.60I60.50J60.50
G03X60.64Y105.40I60.50J60.50
M05
I could not translate this string - (What are you making to run your machine so fast?)
Are you asking for a quick setup of a new car or a quick move? Or other?
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SEREGIUS,
I was asking about your CNC machine acceleration F speeds on each axis.
Regards,
Mauri.
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I use the HIWIN TMH93E series rotary engines.
Now the machine cuts thick metal, I do not know how many hours are left until the end of the cut, there is no estimated test time in Mach4. Then I will try your recommendations.
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Hi Mauri,
I was able to check the speed change. There are no changes in the section, there are absolutely identical circles. I launched another wizard, CV mode is on. I set the maximum speed to 500 and restarted mach4. There is no change in cut, equally curves. ((((
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SEREGIUS,
If you have set a maximum speed of 500, then the CV speed of 1500 in your example posted is 3 times faster.
What are your X/Y/Z Backlash on your milling machine?
If you are using Backlash compensation on your ESS it does not work as they are still trying to fix it, so do not use it and try the circle again.
Regards,
Mauri.
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Mauri,
Sorry for my English.
I installed 1500, as you advised - the circles are not even.
I started the old wizard. Make sure that the CV mode is on. Set the speed to 500. The wizard counted the speed. I restarted Mach4. The circles are not even.
I have a machine for cutting metal with a laser (1500 W). http://forum.machsupport.com/forum/index.php/topic,35121.msg241204.html#msg241204
Backlash compensation I do not use. I do not use a reduction. Motors are attached to the toothed rack Gudel.
Tell us what additional information is needed.
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SEREGIUS,
Not sure what is going on.
I know Mach4 is not the issue as it works near perfect on our Mill with HiCON when making a circle.
I am waiting for ESS Backlash before I use my Router Table with Mach4.
If I have time, I will do a test on that Machine.
I need to fully set it up first.
Regards,
Mauri.
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What is the maximum speed on this machine?
Tested Mach4 at speeds of 20,000 mm / sec and higher?
I need to cut the metal at a speed not lower than 25000 mm / sec.
I will try to set the speed in the gcode 20000, 10000, 1000. And see the changes.
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Just an observation but I assume we are talking about speeds of mm / min. and not mm / sec.
Tweakie.
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Excuse me. Yes, mm. Thank Tweakie.
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Hi,
I conducted cutting tests at different speeds.
26 000 mm / min - the incision is not round.
16000 mm / min - the incision is not round.
6000 mm / min - good lap.
The speed changed in the file GCode.
The speed of the CV set to 500. The braking is not visible, as if mode CV is not on. Squares and rectangles are cut well. If mode CV is turned off, the squares are cut badly. So mode CV is on and does not work on arcs.
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SEREGIUS,
Try doing it with X/Y for the Circle in G-Code instead of I/J and see if it comes out correctly.
Regards,
Mauri.
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Mach4 reports an error.
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SEREGIUS,
You have to program the Circles to use X/Y not just transpose them.
I have run your G-Code under simulation and the Cut Path follows the G-Code Circle.
Have you checked that your X/Y that your Steps per MM in the Mach4 are correct by measuring distance traveled with a Slip Gauge and a good dial indicator?
I think this is your issue and not the Mach4 program.
Below are two examples 2 circle 1 is 100mm diameter and the other is 120mm.
100-120.txt is the X/Y circle cut.
100-120Arcs.txt is the I/J circle cut.
Regards,
Mauri.
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Mauri,
You have to program the Circles to use X/Y not just transpose them.
I use Camduct 2018, i can not get to write the gcode of the circle G1. Only G2 / G3.
I have run your G-Code under simulation and the Cut Path follows the G-Code Circle.
At what speed? At speeds up to 10,000 mm / min, a good circle.
Have you checked that your X/Y that your Steps per MM in the Mach4 are correct by measuring distance traveled with a Slip Gauge and a good dial indicator?
Yes. http://forum.machsupport.com/forum/index.php?action=dlattach;topic=37691.0;attach=49161;image How accurate should the setting be? 0.01 is enough? 0,001?
I think this is your issue and not the Mach4 program.
Maybe...
But Mauri, I can not understand the following questions:
1. On this table, Mak3 cuts well. All circles.
2. Mach4 cuts well, when the arc is defined by one line.
M03
G02X60.64Y105.40I60.50J60.50
M05
3. Mach4 cuts badly when a circle is set by two dvigami.
M03
G03X60.36Y15.60I60.50J60.50
G03X60.64Y105.40I60.50J60.50
M05
4. You tested mach4 at speeds above 10 000 mm / min, to say that mac4 works without errors?
5. Why does Mach3 cut well, and Mach4 is bad (on the same machine), but you say that I have a problem, but not Mach4?
I can't cut the code you gave right now. I do not have axis Z and A. I need to edit it.
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SEREGIUS,
So I can better understand your machine please provide the following.
What type motors are you using to drive X/Y axis CNC machine?
Are they rated to run at the 26,000mm/min F Speed you say you have tested?
What speed have your set the Mach4 configuration "Velocity Units/Min" on Motors 0 and 1?
What is your "Counts per unit"
What is your "Acceleration Units/Sec^2"?
Regards,
Mauri.
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Mauri,
What type motors are you using to drive X/Y axis CNC machine?
Reply #7. http://forum.machsupport.com/forum/index.php/topic,38808.msg262086.html#msg262086
I use the HIWIN TMN93E series rotary engines. https://www.hiwin.com/torque-motors-rotary-tables.html
Are they rated to run at the 26,000mm/min F Speed you say you have tested?
I set the speed in Mach4 55000 mm / min. Engines had no problems with rotation.
The buyer reports that he does not need 55000. He needs a cut at a speed of 35000, and an empty displacement of 40,000.
What speed have your set the Mach4 configuration "Velocity Units/Min" on Motors 0 and 1?
Reply #1. Picture #1. http://forum.machsupport.com/forum/index.php?action=dlattach;topic=38808.0;attach=50062;image
What is your "Counts per unit"
Reply #1. Picture #1.
What is your "Acceleration Units/Sec^2"?
Reply #1. Picture #1.
What information is needed?
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SEREGIUS,
Thanks for the information, I was curious as I have not seen any CNC go that quick.
Can you provide the Circle Diameters you want to cut so as I can provide and X/Y circle G-Code for you to test instead of the I/J and see if it makes any difference to the Circle shape.
Regards,
Mauri.
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Mauri,
You gave code in Reply #18. The machine is busy now. I will conduct tests as soon as I can.
For tests you can draw several circles: 100, 150, 200, 250, 300 mm.
I will correct the code from the router to the laser and do tests at a speed of 25 - 35 m / min.
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SEREGIUS,
Here is the G-Code you requested.
Regards,
Mauri.
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SEREGIUS,
Here is the G-Code you requested.
Regards,
Mauri.
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Mauri,
I cut circles at a speed of 25,000 mm / min. They are even (circles rotate 360 degrees in the cut metal), just like the circle in Post #1, the circle #1.