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Author Topic: A axis as spindle  (Read 1910 times)

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A axis as spindle
« on: May 23, 2015, 08:37:31 AM »
Hi all,
I know this has probably been covered but I can't find what I need to make it work...... My cnc quilting machine only uses x and y axis and I want to use another stepper as a spindle motor so I've wired this to axis a. I've tried all sorts of settings but can't get it to work....

Can someone please talk me through the basic setups for this a axis as a spindle, drive is gecko g540.

Many thanks.

Offline BR549

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Re: A axis as spindle
« Reply #1 on: May 23, 2015, 09:59:47 AM »
You would simply set it up as a step direction spindle.

(;-) TP

Offline ger21

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Re: A axis as spindle
« Reply #2 on: May 23, 2015, 10:29:00 AM »
In ports and pins, set it up as a spindle, and not the a axis.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: A axis as spindle
« Reply #3 on: May 23, 2015, 08:41:47 PM »
Thanks guys
Pretty sure I understand what is required it's just the settings to configure this that I can't work out.....

Tried all sorts of setting but can't get it to work, so obviously I'm doing something wrong. That's why I've come to the experts!!!

Cheers

Offline ger21

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Re: A axis as spindle
« Reply #4 on: May 23, 2015, 10:24:41 PM »
What settings are you using?
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: A axis as spindle
« Reply #5 on: May 24, 2015, 01:07:08 AM »
Tried all sorts of settings, so I'm looking for a starting point from you guys.....

Cheers

Offline RICH

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Re: A axis as spindle
« Reply #6 on: May 24, 2015, 06:13:53 AM »
Stepper is a bad choice for use as a spindle as the rpm will never be linear also as the stepper rpm goes up the torque goes down
thus no power at higher spindle speeds. Indexing fine but then configure A as rotary, but linear you need to put distance based on diameter if I recall. It been a long time since I played that stuff.

FWIW,
RICH
Re: A axis as spindle
« Reply #7 on: May 24, 2015, 07:04:37 AM »
Thanks, for my application I'm not to worried about power as it will still have more torque than the 70w motor the sewing machine comes with.... Will play around with gearing so the motor is in a good part of the torque curve.

The main thing I'm looking for is being able to dial in a constant motor speed as this determines the stitch length.

This is what I'm up to..... (First proto type)

http://youtu.be/SYEOgvNDK8E
« Last Edit: May 24, 2015, 07:07:44 AM by 4lowie »

Offline BR549

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Re: A axis as spindle
« Reply #8 on: May 24, 2015, 12:22:06 PM »
Try setting the motor as a step direction spindle then set the steps per to 200 X(microstep of the driver) Look in config , port pins , spindle setup. Then goto motor tuning.

(;-) TP