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Author Topic: Jerking Motion - CV Mode  (Read 776 times)

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Jerking Motion - CV Mode
« on: August 23, 2017, 07:40:39 AM »
Hello everyone!

I'm not sure where i should put this post to, but the problem is so general that it seemed appropriate for me to put it here.

We are having some struggles with our milling machine and can't work out what is wrong with the machine or setup.

Actually we are working with Mach3 Software in Combination with a CSMIO-IP-S motion controller. The motors are Panasonic Servo drives with quite a lot of power, so definitly not the limiting factor here (I ran it in the Configuration program with up to 50.000 mm/min without any issues).

The problem seems to me that the cv mode is not working at all. We thought of any solution or problem such as slow connection and so on but in the end we could isolate the error to this behaviour:

Even for a straight line with several points on the line and slow feedrates the machine seems to slow down for every point although CV mode is on, or accordingly exact stop is deactivated by G64 in the Gcode file.

I will upload the configuration as soon as I get the corresponding screenshots, but maybe someone can already find an error from the gcode.

Here is the corresponding gcode for testing:

G00 G21 G17 G90 G40 G43 G80
G91.1
(Kugel_16-200 Schaum)
(M6 T310)
M03 S12000
G53 G00 Z0.000
G54
G00X00Y00
Z8.000
G01Z0.000 F10000
X00Y00
X10
X20
X30
X40
X50
X60
X70
X80
X90
X100
X110
X120
X130
X140
X150
X160
X170
X180
X190
X200
X200Y10
X190
X180
X170
X160
X150
X140
X130
X120
X110
X100
X90
X80
X70
X60
X50
X40
X30
X20
X10
X00
X00Y00
M5 M9
M30

Offline ger21

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Re: Jerking Motion - CV Mode
« Reply #1 on: August 23, 2017, 06:35:22 PM »
Turn off all of the CV options. CV Distance, CV Feedrate, ...
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Jerking Motion - CV Mode
« Reply #2 on: August 24, 2017, 01:56:06 AM »
Ok, we will do so, and hopefully I am able to upload the options screen today!

I will uncheck:
CV-Dist tolerance
Stop-CV on angles
CV-Feedrate on the main screen

Any further options i should uncheck?

Offline ger21

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Re: Jerking Motion - CV Mode
« Reply #3 on: August 24, 2017, 06:34:34 AM »
All of the options on General Config.
Stop CV on Angles is really the only one you need. Set it to 89.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Jerking Motion - CV Mode
« Reply #4 on: August 24, 2017, 08:56:49 AM »
I already found the solution thanks to your hint. I allways thought that CV-Distance Tolerance and CV-Distance would be the same for the options menue and the settings screen. But as you also only wrote CV distance I read the CV document another time and saw that this option is located on the settings screen as already mentioned. Unchecked it there and now the Machine works great again!!!

Thanks a lot!