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Messages - sshneider

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341
Works in progress / Re: About to abandon a screen set - Mach Blue
« on: April 10, 2006, 01:03:15 AM »
Sorry to jump in and change the subject but,

Benny I wouldn't be bummed out re: low download numbers.  It's a BETA.  A Ton of ppl don't want anything to do with Betas because, by their nature they are problematic and require R&D to get to a full release.  I'm sure I'm not telling you anything you don't already know. 

Just keep in mind that for every "Maestro of Mach" there are 20 of us that are struggling to understand how to get our motors turning and what the heck backlash is. 

Personally, I think your screen set is cool (I did download and install it) and I also like the MachBlue set that Santini posted.  But if it's not a final tested release, it's like sitting inside a concept car with no engine- Looks cool, it rolls & steers, but it's not going to get you anywhere fast.  IMHO, this is the reason more have not tried it.

Sid

342
General Mach Discussion / Re: calibration problems need help please!
« on: April 05, 2006, 11:39:47 AM »
Hey Dave,

Thank you for the explanation.  I think you should post that explanation in the WIKI because it is so good and there really isn't any real specific info on it there!

I think the problem I was having was I was entering a negative (-) value in the backlash box.  I'm going to change that and try again based on your post. 

I think that I'm going "give it a rest" for today though.  The frustration level meter is starting to peak and I think it's good to take a break when that happens  ;) I'll let you know how things turn out tomorrow!

Thanks again!

Sid

343
General Mach Discussion / Re: Homing in Mach 3
« on: April 05, 2006, 08:09:57 AM »
Dude,

I am no expert but it sounds like you are on the wrong settings page.  Look under the config menu for the "Homing/limits" section.  Try the Home Negative and reversed check box there.  It probably would be good to also watch the video about homing/limits that is on the Artsoft website IMHO.

Good Luck!
Sid

344
General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 05:00:17 PM »
OK, here's the poop...

Brian's calibration hoo ha on the settings page seems to work pretty damn good for me (Thank you Brian!).  Now moving in the +ve (x +) direction everything is spot on.  Things get funny after a move in the -ve (x-).  Instead of moving to -10.00, it moves to -10.02 (i.e. it didn't move enough.  Yet, when I have it goto 0.00 it is spot on.

I think that I have a backlash issue?  I am stuck about how to fix because I don't think I understand enough about backlash and how to compensate for it. 

Thanks for the patience and enlightenment!

Sid

345
General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 12:54:27 PM »
 ;D  Dave Dude!

You are awesome!  That is an excellent explanation.  I'm gonna try that right now and I'll let you know how it turns out!

THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU THANK YOU!!!

Sid

346
General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 11:56:07 AM »
Dave,

AWESOME info- Thanks!  How do I take out the backlash before I calibrate.  Well, I know where to enter the settings but if the machine is not calibrated how do I know how much backlash to compensate for?

Thanks in advance for you assistance!

347
General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 11:27:55 AM »
Uh, this may sound stupid but, what is the "calibrate tool".  I thought that was my tape measure and my micrometer.  Is there some kind of wizard?  Where?

Graham, thanks for the reply- I'll double check my 7.3 but I think it's pretty darn close.  FYI- by playing around with the steps per unit manually I have observed the following

G1 X1.000 - The X-axis actually mics out at around .978 - using the same Steps per setting I'll type
G1 X5.000 - The axis axis will  move to 5.25 .

DAMN this is weird?  It makes no sense to me that it would be under @ 1.0 and over @ 5.0- WTH?? 

I start out being too low on Steps per unit and somewhere in the 5" of Travel I "catch up" and overtake and end up having "gained steps".  If I was just gaining or just losing I would understand but I am doing both in the same moevement.  How?, Why? Help!

Thanks, Sid   ???

348
General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 01:39:39 AM »
Hey Graham,

I am having a similar problem and Since Yeager didn't repost his results I was wondering if you (or anyone else) might have any additional ideas about what might cause this scenario?

Here's what I have going...I am making my table larger and have decided to use a belt drive.  Specifically 'L' type synchro timing belt (reinforced with steel strands).  here's a link http://www.mcmaster.com/nav/enter.asp?pagenum=978

Single 18 tooth pulley at one end of table- other end of table has another 18 tooth and a 20 tooth.  Turning this shaft so the 2) 18tooth pulleys make a full rotation results in the axis moving 7.30 inches.

The 20 Tooth pulley is connected to the motor (with another small 14" belt).  The Motor has a 10 Tooth pulley. See attached cartoon for a (hopefully) better explanation.

Motor has 400 steps per rev.

I calculate 109.5 steps per unit.  So when I try G1 X1.00 it's all good (i.e. the axis does measure out to be 1 inch with a micrometer). 
If I G1 X5.00 and put a tape measure on it, it is at 5.25.
If I G1 X30.00 and put a tape measure on it, it is at 33.00.

It seems like I need to tweak my Steps per.  I try doing that and (like Yeager) get it accurate @ 30" put then the 1" cal is not correct.

Any ideas what gives?  The axis SHOULD travel in a linear (measurement speaking) way right.  What would cause this phenomenon?  Are my Belts cursed?  Do you think this could be a bad cable connection?  Any help is GREATLY appreciated!

Thanks,
Sid

349
Cool!  Thanks Hood!

BTW- You're right M3 ver 1.9


350
This baffles me.  On "Go to Z" shouldn't the 1st thing that happens is the cutter should raise so it's not in in the way of the part being cut or am I nuts?

Is this something that can be changed in the config setup? 

Thanks for any replies!

Sid

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