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Messages - Flipz01

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81
General Mach Discussion / Re: Acceleration
« on: August 19, 2007, 10:24:49 AM »
OK - now imagine a high speed machine using linear motors capable of 1,600 lbs. continuous force and peaking at about 4,000 lbs. of force pushing a crossbridge that weighs about 650 lbs.  This machine will easily run at 2g acceleration rates.

I have to decide soon whether to commit to Mach3 to run this or use my current CNC.  What I'm using now will do this, but I'm trying to move to Mach, and this may be the next project for us.

I get that, in theory, Mach can do this.  I'm hoping to get feedback from somebody who has actually tried something similar, and to know if they had any problems with the accel/decel, corner rounding, arc tolerences, etc.

82
General Mach Discussion / Re: Acceleration
« on: August 16, 2007, 08:47:15 AM »
There's nothing theoretical about acceleration.  It requires lots of power (our systems are servo and can be increased in size/power to accomodate higher accel rates), and also the ability of the computer/program to handle the accel/decel in a controlled fashion.

Such things have practical limits and I'm trying to find out what they are.

Why do I want/need higher acceleration?  For the ability to do small arcs and circles at feedrates around 400 IPM.  Think about what it takes to throw around a 1,000 lb. bridge in a controlled fashion making a 1/8" hole at 400 IPM - a hole that ends up being nearly perfectly round.  The higher the acceleration your system can handle confortably, the faster you can cut a controlled circle.

This is not a trivial task!

83
General Mach Discussion / Acceleration
« on: August 14, 2007, 04:21:27 PM »
If I understand correctly, Mach is capable of about 1/3 g acceleration.

Just wondering if the increased speeds to 100k SPS increases the accel that is possible?

Anybody know about this?

84
LazyCam (Beta) / Re: Loading HPGL files
« on: August 05, 2007, 09:42:39 AM »
They were generated by a program that one of our customers sell with his laser machines.  All of their laser run HPGL only, and these files are typical of what gets generated.

As stated, these post perfectly on our current control which reads in HPGL directly (and G-code) and uses it as a cut program.

I think I sent these files to you converted to DXF also.  I found an HPGL to DXF conversion utility to do it, and when converted, there are a lot of lines that don't intersect.  Your old LazyCam will load those perfectly with the filter set to 0.001", the new LazyCam won't run them.

85
General Mach Discussion / Re: M108
« on: July 29, 2007, 04:37:16 PM »
No, nothing there.

I'm trying to decide if this is written there when the program first loads, if it is a typo, or if I edited it by mistake.

Don't know, guessing it's a typo.  But, from what I don't know.

86
General Mach Discussion / M108
« on: July 29, 2007, 03:19:56 PM »
Anybody know what M108 is?

I just noticed it in the Initialization String, and I don't see it listed in the M-code table.

87
LazyCam (Beta) / Loading HPGL files
« on: July 15, 2007, 03:28:04 PM »
Does anyone out there load HPGL code into LazyCam?

I use the included files on a different control that runs them just fine (it runs HPGL files or G-Code files), but I can't get LazyCam to pick these up to convert them to a form that Mach can use.  It seems to try, but the display is nowhere near correct.

Anybody know why?


NOTE:  I changed the extensions from *.plt to *.txt because the forum program won't let me post a *.plt extension.  You'll have to change this to try to run the file.

88
General Mach Discussion / Re: Tweeking Things
« on: June 28, 2007, 08:52:05 AM »
I know, I'm being picky.

However, it's set someplace and if I can get at it, I'll probably default to 100IPM - just because.

89
General Mach Discussion / Re: Tweeking Things
« on: June 27, 2007, 04:19:39 PM »
Homing to Y=73.  Go to "Config"   "Homing and Limits"  set "Home Off" for Y to 73 and set "Home Neg" to off.

Oh, yea, baby.  Perfect!


Still looking for a way to change the default feedrate.  For those reading, this has nothing to do with the "seek limits" speed, but is the feedrate displayed when you turn on Mach3.  It always starts at 6 IPM.

90
General Mach Discussion / Tweeking Things
« on: June 27, 2007, 10:35:51 AM »
The default feedrate comes up as 6 IPM.  Is there a way to change that?

We generally like to home to the low limit on the x-axis (left/right) and to the high limit on the y-axis (front/back).  That way, the tool is out of the way so you can load material after it finds the switches.  In Mach3, that seems impossible because I can only set the absolute position at the limits to 0.00.  Is there a way to set the absolute coordinates to read something different?  In my case, I'd like to find my limits, and then have the absolute registers set to x=0, y=73.

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