Messages

711

General Mach Discussion / Re: Gantry Router

« on: June 14, 2013, 02:35:45 AM »

Good you're making progress William.

Can i ask why the stepper drivers i have need to run on active low?

see section 10. "Sequence Chart of Control Signals" in your driver data sheet here.

also,, what is "optos"?

See Optocouplers

Ian

712

General Mach Discussion / Re: Gantry Router

« on: June 13, 2013, 11:13:32 AM »

I agree with Brett that they should be active low (though the DS isn't exactly clear).

However I'd guess you have BOB issues. Try switching (say) X and Y driver connections at the BOB and see what happens. One of the reasons I dislike BOBs is that they seem to think it's a good idea to have optos on everything. Optos on the BOB driving optos on the driver is (IMHO) a recipe for unreliability. I also love this bullet point on the fleabay add re: the BOB - "Upgraded circuit, work more peacefully and steady than the previous version" Hmmmmm.

Ian

713

VB and the development of wizards / Re: VB to enable/disable "A axis rotations" in toolpath display.

« on: June 13, 2013, 10:22:46 AM »

No - I suggested two different profiles OR... - do try to keep up Terry 

Ian

714

VB and the development of wizards / Re: VB to enable/disable "A axis rotations" in toolpath display.

« on: June 13, 2013, 09:53:55 AM »

Isn't that what I said Terry?

Ian

715

General Mach Discussion / Re: Should this work - Emulated Input Signal

« on: June 13, 2013, 08:19:27 AM »

Always difficult to home in on software issues without seeing the software - maybe you could post what you have and your xml.

716

VB and the development of wizards / Re: VB to enable/disable "A axis rotations" in toolpath display.

« on: June 13, 2013, 04:41:16 AM »

Hi Darc - AFAIK you can't toggle this with script. However - off the top of my head you could have two Mach profiles OR maybe you could use B in your constant rotations code instead of A.

Ian

717

General Mach Discussion / Re: Help on selling a Mach 3 CNC

« on: June 13, 2013, 04:32:55 AM »

OK - as this is not your pride and joy but a simple cold hard cash question...

First off it looks home brew to me - of course I could be wrong.

Round motors - not good - unsupported round rails where diameter looks small for length - not good - screw supported by motor - not good - screw very small diameter for length - not good - "regular" wood router for spindle - nothing special - thin looking bent steel work - not good. All in all (IMHO) a pretty good example of how NOT to build a router.

Does it work? - what sort of speeds and accel does it hold - accuracy/repeatability/backlash? - my guess would be none of them particularly good - maybe you can say different but it's notable that you haven't said anything about it working, if I was a potential buyer (I'm most definitely not BTW) I'd assume the worst.

That said - the bay's awash with people paying way over the odds so you may get lucky and if you do I think you'll be looking at (low) hundreds but only IF IT WORKS.

Just my honest view - others (190 odd of them so far) may completely disagree - but they don't seem to be jumping in making offers.

Cheers

Ian

718

VB and the development of wizards / Re: VB to enable/disable "A axis rotations" in toolpath display.

« on: June 12, 2013, 08:36:55 AM »

what are you hoping to achieve?

719

General Mach Discussion / Re: Help on selling a Mach 3 CNC

« on: June 12, 2013, 03:53:56 AM »

how open are you to the hard truth my possibly hardish opinion  ?

720

Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: June 11, 2013, 10:52:49 AM »

Hi Tommy - welcome to the forum

Best if you post your question in the general section as more people will read it there. This section is really just for introductions.

Cheers

Ian