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Author Topic: Pulley Setup......Yes i know but just dont understand it??  (Read 4401 times)

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Pulley Setup......Yes i know but just dont understand it??
« on: November 22, 2013, 10:11:56 PM »
Hi all, I have been running my system now for about 2 years and my spindle speeds (driven via a VSD 120Hz = 7000RPM and 400Hz = 24000RPM) have been okay'ish but now i have replaced the PC and would like to set it up properly. I now have spend the last few days trying to figure out how the pulley setting work but just cant. What i change or set doesn't come out when testing. Do I set just pulley 1 from 7000 to 24000 with a ratio 3.429 or do i setup all 15 pulleys starting at 7000 to end at 24000?

Can somebody pls help because all the searching i cant find anything.

Regards

John 

Offline ger21

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Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #1 on: November 23, 2013, 12:07:20 AM »
Set Pulley 1 from 0 to 24,000 with a ratio of 1.

How are you controlling the speed at the VFD? If using PWM, set the PWM Min% to 30 to keep the rpm from going below 7000.
Gerry

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JointCAM Dovetail and Box Joint software
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Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #2 on: November 23, 2013, 04:47:19 AM »
I'm using the 107 card to control the VSD, from 120Hz to 200Hz. I'm not sure, do I set just pulley 1 (well I have and the VSD sits at 157) or all 15 of the pulleys. This whole process just does not make sense to me. After trying different settings in the pulleys I can get full 200Hz or 24000rpm if I call "M3 S5000". I have changed and monitored the values in the pulley settings but nothing gives me a pattern, if that makes sense??

Offline ger21

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Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #3 on: November 23, 2013, 08:14:54 AM »
As I said, just set Pulley 1 only, from 0 to 24,000. Make sure Pulley 1 is your current Pulley. Set the PWM min % to 30.

Your available RPM will be only what the Current Pulley is set to.

Then, depending on the commanded speed, Mach3 will output a proportional PWM Signal from 0 to 24,000rpm. By setting the minimum to 30, if you accidentally command 1000rpm, Mach3 will bump it up to 30% of 24000rpm, which is about 7000.

If you've ever tried do calibrate the spindle in Mach3, go to your Mach3\macros\yourprofile\ folder and delete the file "Linearity.dat". Then restart Mach3.
Gerry

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

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #4 on: November 23, 2013, 02:37:31 PM »
Hi Gerry, Thank you and I tried what you suggested but has no effect. I have also changed the PWM signal to 30%, 5% and any value between the two with out much effect.
Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #5 on: November 26, 2013, 01:40:55 PM »
Hi, does anybody else have any advice because this pulley thing is just not working. I have sat for days trying different things with out any success.
Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #6 on: December 02, 2013, 06:29:22 PM »
HOLA ME PODRÍAN AYUDAR A CONFIGURAR MI FRESADORA SOY NUEVO Y EL QUE LA VENDIÓ NO ME RESPONDE  TIENE POLEAS Y NO ME RESPETA LAS MEDIDAS LAS POLEAS SON DE 60 DIENTES Y DE 18 DIENTES CON MOTORES A PASO DE 1600oz GRACIAS
Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #7 on: December 02, 2013, 07:08:30 PM »
Thank you. But I have no idea what your saying?

Offline Jackal

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Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #8 on: December 06, 2013, 08:49:46 AM »
Libbet,

I have the same problem. I did my machine about 2-1/2 years ago.

When running in low range I have to use M04 to run the spindle forward. People have told me  it is a glitch in the version of Mach that I am using.

It needs to be updated, but it is running too good. Hopefully in the next month I will do this. Then the machine can power tap.

Check your version of Mach.
Jackal
Everything is bio-degradable if you run over it enough with a lawnmower.
Re: Pulley Setup......Yes i know but just dont understand it??
« Reply #9 on: December 06, 2013, 10:52:53 AM »
HOLA ME PODRÍAN AYUDAR A CONFIGURAR MI FRESADORA SOY NUEVO Y EL QUE LA VENDIÓ NO ME RESPONDE  TIENE POLEAS Y NO ME RESPETA LAS MEDIDAS LAS POLEAS SON DE 60 DIENTES Y DE 18 DIENTES CON MOTORES A PASO DE 1600oz GRACIAS

Hello I MIGHT HELP TO CONFIGURE MY milling machine I AM NEW AND THAT THE PUTTING DOES NOT ANSWER ME HAS PULLEYS HE RESPECTS ME AND NOT MEASURES THE PULLEYS ARE 60 TEETH AND 18 TEETH WITH ENGINES TO STEP 1600 oz THANKS