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4th axis speed
« on: July 08, 2017, 11:56:55 AM »
Try to be short and precise as possible.

running Mach3 2.0 on a Velox CNC with 4th axis indexer. Problem is the 4th axis is turning extremely slow when running gcode. It is turning so slow that instread of cutting the wood piece it's burning it. any advice on how to adjust the speed of the indexer?

Offline RICH

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Re: 4th axis speed
« Reply #1 on: July 09, 2017, 06:47:01 AM »
Change the feedrate of the indexed moves in the gcode?

RICH

Offline ger21

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Re: 4th axis speed
« Reply #2 on: July 09, 2017, 07:17:38 AM »
The velocity in motor tuning is in degrees/min, so the A velocity should be much higher than the velocity of your other axis.

In Config > Toolpath, check "Use Radius for feedrate".
On the Settings page, enter the Rotation Radius for your part. If you are setting Z zero to the center of your stock, enter .001.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: 4th axis speed
« Reply #3 on: July 09, 2017, 07:37:05 AM »
Here is the begining of some sample gcode I generated in aspire 8.5. where is the indexer feedrate?

( Rounding Toolpath )
( File created: Sunday July 09 2017 - 06:34 AM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 8.000, Z= 0.500)
( Diameter = 1.0000 Inches)
( Y Values are wrapped around the X axis )
( Y Values are output as A )
()
(Toolpaths used in this file:)
(Rounding Toolpath)
(Tools used in this file: )
(1 = End Mill {0.25 inch})
N130 G00G20G17G90G40G49G80
N140 G70G91.1
N150 T1M06
N160 G00G43Z1.3000H1
N170 S12000M03
N180(Toolpath:- Rounding Toolpath)
N190()
N200 G94
N210 A0.0000 X0.0000 Z1.3000 F100.0
N220 G00 X-4.0000 A180.0000 Z0.7000
N230 G1 X-4.0000 A180.0000 Z1.2500 F60.0
N240 G1 X4.0000 A180.0000 Z1.2500 F100.0
N250 G1 X4.0000 A167.1429 Z1.2500
N260 G1 X-4.0000 A167.1429 Z1.2500
Re: 4th axis speed
« Reply #4 on: July 09, 2017, 07:51:54 AM »
The velocity in motor tuning is in degrees/min, so the A velocity should be much higher than the velocity of your other axis.

In Config > Toolpath, check "Use Radius for feedrate".
On the Settings page, enter the Rotation Radius for your part. If you are setting Z zero to the center of your stock, enter .001.


Thanks for the reply.

When I home all my axis the A axis turns a lot faster than when I run G code so i know the indexer will turn a lot faster. Currently the Velovity is set to 799 and acceleration is 400. where exactly is the setting where i put in .001 ? I cannot seem to find it. can you post a screenshot if possible

also check out the sample g code i posted below and tell me if it is setting a speed in the code.

Offline ger21

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Re: 4th axis speed
« Reply #5 on: July 09, 2017, 08:48:28 AM »
Upper right corner of the settings page.
No, it's not a g-code issue.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: 4th axis speed
« Reply #6 on: July 09, 2017, 12:09:06 PM »
Tried both of those settings and it's still really slow. But when I home all axis it's a lot faster... I don't understand what's going on lol

Help !!

Offline ger21

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Re: 4th axis speed
« Reply #7 on: July 09, 2017, 12:10:58 PM »
Did you check the box in Config > Toolpath?
Where are you setting Z zero?

Is the A axis steps/unit setup in degrees?
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html

Offline rcaffin

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Re: 4th axis speed
« Reply #8 on: July 12, 2017, 07:32:58 PM »
Um ... Gerry - can the A axis setting be in anything other than degrees? I dunno.

Cheers
Roger

Offline ger21

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Re: 4th axis speed
« Reply #9 on: July 12, 2017, 07:50:23 PM »
You can set it to whatever you want. But the steps/unit should be steps/degree.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html