Hello Guest it is March 29, 2024, 07:15:39 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Peter Homann

321
General Mach Discussion / Re: 3vdc outputs
« on: December 13, 2009, 10:00:02 PM »
This may be a dumb question, but I was having trouble getting any voltage through my parallel port, so I started reading this forum, and was able to figure that problem out.  The problem now is that my parallel port is putting out 3Vdc as opposed to the 5Vdc that is required by my drivers.  Is this going to be a problem, and if it is does anyone now how to fix it?

Thanks,


Hi,

What you need is a way to convert the 3.3V signals to 5V. The MB-02 breakout board I make and sell can do that for you.

http://homanndesigns.com/store/index.php?main_page=product_info&products_id=59

Cheers,

Peter.

322
Hi Steve,

Not sure where the Mike came from. Sorry. I checked with CNCDrive, they confirmed that there should be no issue. There shouldn't  be as a step/dir interface is a reletive one, as opposed to an absolute one.

With step/ Dir, it is move this increment from where I am.

I have one of the small servo drives from ImService. They fault after a short while of continuous running in one direction. Poor designas I see it.

Cheers,

Peter.


323
Hi Mike,

After reading your excellent trade study on servo drives, I've just ordered a Dugong Servo drive that I plan to use to drive my Lathe spindle which is a 400W 90Vdc motor.I've just had a thought. Do you know if the Dugong drive capable of being continuously run in 1 direction? Some servo drives fault after running too far in one direction.

Cheers,

Peter.


324

Hi,

Absolutely not. Have a look at the sample setup diagram GeckoDrive manual. It shows you how to control the relay.

http://www.geckodrive.com/upload/G540%20REV4%20MANUAL.pdf

Cheers,


Peter.


325
I'm having a bit of trouble understanding your setup. But to turn the spindle on and off via Mach3 through the G540, you need to have the G540 control a relay that turns the power to the spindle on/off

Once you have set it up you should be able to use the M3/M4 and M5 words to control the spindle from GCode.

Cheers,

Peter.

326
General Mach Discussion / Re: Lathe turret, VB, PLC, MODBUS, Position
« on: November 18, 2009, 06:30:10 AM »
Hi Hood,

I had the prototype live on air a few weeks ago. I don't have any other info other than this thread.

http://www.machsupport.com/forum/index.php/topic,12968.0.html

Cheers,

Peter.

327
General Mach Discussion / Re: Lathe turret, VB, PLC, MODBUS, Position
« on: November 18, 2009, 01:00:53 AM »
Dustin,

You would have to write ladder code to unpack them. What it means is that the data is transferred as a register rather than a coil (C). The advantage is that the Modbus messges are shorter , so don't worry about it at the moment, (or ever)

Cheers,

Peter.

328
General Mach Discussion / Re: Lathe turret, VB, PLC, MODBUS, Position
« on: November 17, 2009, 08:40:22 PM »
Hood,

It's good to use what you know. :)

The ModIP I'm designing will hopefully be an attractive alternation to commercial PLCs. I'm putting in a basic scripting language, so that if you can write macros in Mach3, then you should have no trouble doing it in the ModIP.

The other thing is that there will be many built in functions that will hopefully make it simpler to use. It should cater for building user interface modules as well as more traditional PLC uses such as tool changers etc.

Cheers,

Peter.

329
General Mach Discussion / Re: Lathe turret, VB, PLC, MODBUS, Position
« on: November 17, 2009, 06:58:24 PM »
Hi Hood,

What you are doing is sending the bits as holding  registers packed with 16 bits in each, rather than sending each bitseparately.

What you are doing is more efficient and requires the ladder in the PLC to extract the bits out of the holding register, or have a PLC that overlays the bits onto the holding registers. I don't think the click PLC does this. But, the ModIO does. :)

Cheers,

Peter.

330
General Mach Discussion / Re: Lathe turret, VB, PLC, MODBUS, Position
« on: November 17, 2009, 06:16:50 PM »
Hood,  Normal, I am pretty sure.  I don;t think I am using a plug-in, but I am not sure what that is.

Dustin

If you are using the Plugin, the modbus setup screen looks like a blue table.

Cheers,

Peter.