Messages

241

General Mach Discussion / Re: Limit switch issues

« on: December 28, 2015, 08:53:11 AM »

yeah, they are wired N/C so 5 vdc is constantly going through them so the x'd out column in the active low settings column makes sense now...

Glad it makes sense to you because unless you have signal inverters in there somewhere which you haven't mentioned, then it makes NO sense at all.

242

General Mach Discussion / Re: Limit switch issues

« on: December 28, 2015, 08:05:26 AM »

LOL - you're both right of course - but given the way this thread's gone so far, aren't you both making the rather rash assumption that Mike's view of Ohm's Law is the same as everyone else's? 

243

General Mach Discussion / Re: What is my current feedrate?

« on: December 28, 2015, 06:17:40 AM »

You've got some curious code there Dave.

Strange use of the S command.
What's M22 doing?
But mainly what are you doing with M98?

You also have a comment that says Feedrate is 4100 yet you haven't set the feedrate anywhere to 4100 - no comments are bad - incorrect comments are a hanging offence.

Oh and finally WTF is a square circle? 

244

General Mach Discussion / Re: Limit switch issues

« on: December 28, 2015, 05:44:30 AM »

LOL: a few thousand posts back our man posted a data sheet with a clear as day picture of the switch terminal layout. Just look at which freakin' terminal the wire's connected to and compare it to the pic.

245

General Mach Discussion / Re: Limit switch issues

« on: December 27, 2015, 01:26:02 PM »

I see things have moved on a tad but I'll answer some of the questions you posed to my earlier post anyway.

1)that doesn't explain why a user would want to move one or more of their axis past the limit switch where by doing so, they will damage their machine.

I have no idea why a user would WANT to do that - he would have to be a very stupid user indeed. I've explained why Mach3 doesn't PREVENT a user from doing that.

2)but your "home" should be 0,0,0 on the table, not (in my case) 0,48,0. Once zero'd in, you can move the gantry anywhere you like.

There's no "should" about it however much you would like it to be true. Home is a datum - it matters not one jot WHERE it is. It affects NOTHING you can do or can't do.

BTW - this will probably muddy your waters even more but home is very RARELY (if indeed EVER) at 0,0,0. That would mean that your Z is homed toward the BOTTOM of your Z and THAT is plain silly for a variety of reasons.

But look - if you have switches at front left then just set THEM up in the software as your homing switches and call it 0,0 if it makes you happier. (you still really don't want to set Z home to be zero though).

3) funny, mine are wired in parallel and yet home consecutively.....if I understood why you write, they should all home at the same time.....

Read again - I said if they are wired in parallel "you can choose to set up so axes home concurrently".

4) but ftp links are a web address....

They most certainly are NOT.

246

General Mach Discussion / Re: Limit switch issues

« on: December 27, 2015, 10:19:35 AM »

d) ftp links do not start with http.

The problem here is that this forums messes up ftp links.

How so?

machsupport.com/Docs/Mach3%20Setup%20Tutorial.pdf

247

General Mach Discussion / Re: Limit switch issues

« on: December 27, 2015, 08:58:43 AM »

If you're interested, I can explain

a) Why, after a limit has been hit, there is good reason why Mach3 allows a careless user to jog or move further onto the tripped limit.
b) why, it is a perfectly reasonable option to have a machine set to home to back left rather than front left.
c) why you most likely don't need to re-wire anything or move any switches on your machine and yet still have it do whatever you like.
d) last and probably least, why the ftp links in this thread are "dead".

sure go ahead...

a) Mach3 was designed to be fully functional with just ONE parallel port. It therefore has just 5 inputs. With just ONE input you can have fully functional limit protection AND homing.

How many inputs do you suppose you'd have to sacrifice just in order for Mach3 to prevent a careless user from jogging the wrong way after a limit trip?

b) Using a 3 axis setup as an example, home does not have to be 0,0,0. It can be any coordinate you like. Having it at the back means on an X gantry machine the gantry is not obscuring the table.

c) Limits can be wired series where they use just one input or in parallel where they can use as many inputs as you have switches if you so choose. Is there any point in the latter? absolutely none. Functionality will be identical.

However you can also use some of those switches to double as homing switches. If you stick with series, all will work just fine but homing will be done sequentially. If you wire parallel then you can choose to set up so axes home concurrently.

d) ftp links do not start with http.

248

General Mach Discussion / Re: Limit switch issues

« on: December 27, 2015, 06:11:23 AM »

If you're interested, I can explain

a) Why, after a limit has been hit, there is good reason why Mach3 allows a careless user to jog or move further onto the tripped limit.
b) why, it is a perfectly reasonable option to have a machine set to home to back left rather than front left.
c) why you most likely don't need to re-wire anything or move any switches on your machine and yet still have it do whatever you like.
d) last and probably least, why the ftp links in this thread are "dead".

249

General Mach Discussion / Re: Mach3 license problem

« on: September 24, 2015, 12:59:51 PM »

who did you buy the sheetcam license from?

250

General Mach Discussion / Re: Stop CV issues...

« on: September 14, 2015, 06:15:26 AM »

Well I had a vague recollection that actually I'd seen this before. It was raised here in 2007 and fixed in R2.56. I guess it was broken again later. The latest version I've just tried is R3.043.62 and it's still busted in there.

It's actually nothing to do with short lines, it's simply when you have any arc following any line where "stop cv on angles >" is ticked.

So Dave, if you absolutely must turn CV off selectively, here's "A" solution for you. Just stick a G61 and a G64 in your code at the appropriate places. There are other ways but this seems as easy as any.