Let the fun begin !!! ???

[JAZZCNC]

Paul your not listening properly because if you'd done as I suggested then the spindle wouldn't start at all. And the speed would be controlled from the VFD using what ever speed you set.

You need to take a few steps back and deal with one problem at a time. Stop changing settings willy nilly because this makes the Job of helping so much harder. All this does is waste yours and my time by chasing false issues. I need you to only change one thing at a time then report what happens.

First all you need to do is get Relay #1 working. Forget #2 & #3 we don't need them so you can turn them off on the BOB and disable them in Mach3.

Straight away I see that you have the Wrong Pin number set for Relay #1. It should be Pin 16 not 14.
Pin 14 is for the PWM Speed control which I believe is working fine just needs setting up for correct speeds which can be done later. NOT NOW.!!

So to re cap Tell me which terminals your connecting to on the Relay.
Set Output #1 = pin16 Active LO.
Turn off the Enable for Outputs #2, #3.


Next the relay will have 3 terminals which are you connecting to.?

[PAULRO]

i have relay 1( OUTPUT 1)
set to pin 16, active LO. ( ticked) ( all other relays disabled. )
TERMINALS on relay
N.O CONTACT =FOR on VFD
COMMON= DCM on VFD

[PAULRO]

RELAY 1 is on . i metered accross the N.O contact and common and have continuity.

[JAZZCNC]

RELAY 1 is on . i metered accross the N.O contact and common and have continuity.

Ok well first makes sure Spindle is OFF. Type M5 in MDI. Check Continuity again.
If still got continiuty then Change active state (NO Tick) and Check continuity again. It should drop Off. Type M3 and it should give continiuty again.
If it does you are working correctly.

[PAULRO]

that's O.K. Relay turns on/off using M3/M5. i had to change active lo setting to set it correct way .

[JAZZCNC]

that's O.K. Relay turns on/off using M3/M5. i had to change active lo setting to set it correct way .

Ok Great now next step is to test on VFD.

So first set VFD PD002 = 0. We are just testing ON/OFF for now so control speed on the VFD Key pad.

Set PD001 = 1 Then Connect wires Back to Relay contacts and M3/M5 should start and Stop VFD.

DO NOT TRY Controlling speed yet.!!

[PAULRO]

that's fine, M3/M5 starts and stops spindle

[Neale]

On the side topic of pumps - I use a similar Whale pump. I use 12V to run it for a few seconds to purge bubbles more quickly, but I then run it on 5V. Seems to circulate enough water to keep the spindle cool, and I have run it like that for quite a few 5-6hr sessions continuously with no apparent ill effects.

Good luck with the Mach3/BOB issues!

[PAULRO]

hi Neale, how do you control the 12 volt psu dropping out and the 5 volt kicking in?

[Neale]

I have a 2-way centre-off switch mounted on my control box which has an old pc power supply in it. That gives me both +5 and +12 selected via the switch - purely manual operation. My new machine (under construction for rather too long now) will use gcode switching via the motion control card; I'm not sure yet whether to stick to 5V or to add a manual override to give a short 12V burst at the start of a session or when first pushing water through the system. Once the pipes are full, the system is balanced and it doesn't need much to keep the water circulating (from a bucket at the side of the bench - never gets very warm but I'm not working the spindle very hard).