Spindle Speed Control

**cncJim** · 11-06-2013

Ok, I have just checked the voltages from the spindle 3 board to the vfd and readings increase by roughly 1 volt per 1000 rpm (set the spindle to 1000 = 1v, 2000 = 2v ..... 9000 = 9v, 10000 = 10v). Everything over 10000 the spindle board just spits out 10v, and at 10v the vfd displays a speed of roughly 22000. This explains why I thought I had no control, I never tried to take the speed lower than 10000 so the it always ran at the same speed.

So I guess the issue would be with the config in mach 3 (motor tuning?)? I have just checked the mach 3 setup manual and I'm not sure it's in English! Even if I could get my head round it will i will still be stuck as I have no information on the vfd/spindle and therefore have no idea on the correct values to enter?

Am I stuck cutting everything at 22000?

Ic2 - thanks for the pulley tip, I was wondering why mach 3 kept moaning when I tried setting lower values! As for measuring the speed I do not have any tools to do that.... I only have the display of the vfd.

Jim

**i2i** · 11-06-2013

what are the min and max values in the spindle pulleys

**cncJim** · 11-06-2013

The min was 20000 and max was 24000. I changed this to min 0 and max 22000 so could test different values.

**Kn8** · 11-06-2013

Hi Jim
If you post some pictures of your VFD it may be possible to identify it and source manual for it.

Kn8

**cncJim** · 11-06-2013

Originally Posted by Kn8

Hi Jim
If you post some pictures of your VFD it may be possible to identify it and source manual for it.

Kn8

Thanks Kn8, here are some pics of the vfd and spindle.

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Edit:
Just found the front cover for the vfd in a box of bits! It doesn't have a model number but it does say "240v 1.5Kw".
I've had this thing for over a year and never spotted it, what a spanner!

**Kn8** · 11-06-2013

Jim

That looks like a Huanyang Inverter I have sent you a PM.

Kn8

**cncJim** · 11-06-2013

So with the manual supplied from Kn8 (thanks again!) it looks like I have a HUANGYANG HY01D523B 1.5 Kw VFD

Next step is to sus out how the vfd has been configured and see how that matches up in mach 3...

I guess it's possible to have a potentiometer supplying 0-10v to the vfd for complete manual control? Has anyone done this?

Jim

**Jonathan** · 12-06-2013

This might help:
http://www.mycncuk.com/forums/router...-rs-485-a.html

Although I think you're not far off getting the current version working as it looks like just a scaling issue.

Originally Posted by cncJim

Make sure you clean the collet before putting it in the spindle. In the picture there's wood dust inside the collet. This is a quick way to damage the spindle taper and increase runout...

**m_c** · 12-06-2013

morepointlesssettingchanges

**cncJim** · 13-06-2013

Jonathan - Wow I like the amount of control/feedback you get with the plugin - This may be a future upgrade! Thanks for the collet tip

m_c - Thanks for the step by step info - the motor tuning page of mach 3 scared the crap out of me to begin with but its starting to make sense now - I will give this a try when I get the spindle fixed......I somehow managed to snap off the gx16 connector off the top of the spindle. Luckily I had planned to replace the 3 pin gx16 with a 4 pin one to earth the spindle and have the parts ready to install :)

Jim