What Bob is it Jim.? . . . . Also do you realise you don't have to use the enable on the drive if you don't want to. ?
Sorry its not so clear in the image I uploaded is it...
Its a pcpps bob
And the drive is a leadshine m752.
I have been running without using the enable function (nothing connected on the drive) but i wanted to understand how it could work really.
Yes I had a feeling it was PCPPS.
just take Ena(+) on drive to Ena pin on BOB and Ena (-) on drive to Gnd on BOB. You'll then have to set the Enable output in mach and tell it which pin number.
The Following User Says Thank You to JAZZCNC For This Useful Post:
Great, thanks for that Jazz I will give it a go. :)
Follow up question, should there be a power up order for the PC, BoB, stepper drives, Vfd etc?
Clives correct but really if control is done correctly it would go like this.!
PC First then turn on Power to control box which turns on the BOB and Low voltage PSU for safety. Then the drives etc come on when you push the Reset button and only if every thing is safe do so.
This way if the Control software isn't in control and ready. ie: PC crashed Bob will disable motor outputs because no charge pump.
Or if the E-stop is pressed safety system won't turn on the drives, vfd etc.
Or if limit is pressed the system will reset and drives will turn on but won't enable there outputs and also shouldn't allow control softare to reset.
Last edited by JAZZCNC; 24-12-2015 at 07:29 PM.
Last edited by cncJim; 01-01-2016 at 03:54 PM.
I haven't got round to testing the enable pins on the drives yet as I need to order the correct connectors (http://uk.rs-online.com/web/p/non-fu...locks/1896010/ in case it's useful to others).
I have tested the enable pin on th BoB and got a slightly odd result:-
1. BoB off, PC on - 2.26v
2. BoB off, PC on, Mach 3 loaded - 1.09v
3. Mach3 loaded, BoB on, emergency stop active - 4.97v
4. Mach3 loaded, BoB on, ES reset - 195mv
5. Mach3 not running, BoB on - 4.9v
6. PC off, BoB on - 4.9v
So they all look ok to me except for number 2. From what I understand TTL levels a Low is 0v to 0.8v and a High level is 2v to 5v so a voltage of 1.09v is neither low of high which may or may not cause problems.
Anyone expirence this kind of thing before?
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