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Messages - kf2qd

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101
Flyer Tuck -

What was a nice feature on whatever machine you ran before is not a common feature so you would be hard pressed to find it on other machines designed by other people. Subroutines and such were not part of the original spec and as they were added most manufacturers tried to keep them defined so the various post processors would work without a major expense for the users of their machines. A few manufacturers had special functions and created special tools to take advantage of those special functions as a way to sell their project and perhaps leverage the customer into buying their machine in the future. As the machine tool industry has aged some of the old marketing schemes have been viewed as benefitting the manufacturer rather than the customer so customers have looked for other ways to meet their need for machine tools. Thus some of the old iron companies are no longer in business and smaller companies that build similar machines have become more the norm. And inordwer to sell a machine it needs to work with the software that the customer is already using. Thus some of the extra features that are not absolutely necesary have disapeared.

And seeing as how most CNC programmers have not been computer programmers it was easier to get results with simpler programmeing requirements. Results is what drove the process, rather than great skills.

102
You might want to double check this, but you could probably download a current copy of Mach3 and install it and set up the parameters and it would work just fine.

Do you have a spare computer you put a new copy of Mach3 on and see how it works?

Or - if they don't charge you - get it unlocked so you can do what you want to do with the machine. Sounds more like they want to tie you to them for financioal purposes...

103
General Mach Discussion / Re: aluminum die making
« on: May 31, 2010, 09:39:18 AM »
First off - I don't have a whole lot of experience with your particular application ...

If you are making a die for leather you probably don't need any taper because you are embossing the surface, and you may need to look at a radius on the edges of you pattern ubnless you want to cut the leater as you emboss it. A 90 degree edge will tend to cut the leather, where a radius edge will press into the leather without cutting. Are you going to embossing wet leather with a heated die - that does give a more durable image as the wet leather is more formable and the heat would drive out the water leaving a very pronounced durable image. Lightly oiling the area would then protect the image and the leather.

If you are trying to use this as a punch you would probably be better off using steel as the alluminum would probably erode rather quickly from all the rubbing on the leather as it punches through.

For a wood burning die you want enough clearence that any material (smoke, finish...) doesnt fill up the die to quickly and ruin any definition the you are expecting from you pattern. Narrow angles and small details can be a problem.

A better aluminum that would have better wear characteristic would be 7075. It is much harder and can be a real pain if you are trying to put small threaded hols, but it wears real wlell in die type applications.

104
Tangent Corner / Re: Backlash in planetary gearboxes
« on: May 27, 2010, 03:01:04 PM »
Backlash is still calculated in real world units. It does not matter where it occurs as it still looks like it occurs at the moving stage. How many steps per inch/mm/furlong, how much backlash in inches/mms/furlongs

105
Manual won't come up for me - Can the drives be configurted for Step & Direction?

The newer Yaskawa Sigma series can be setup for Analog or Step&Direction. Omron sells a repackaged version of the Yaskawa drive that they call SmartStep that are stepper input only. I have also used Mitsubuishi drives that were step & Direction, but I preferred the Omron/Yaskawa drives. If you have the money one of these options might be easier to work with and you can get a local vendor to give you some assistance, depending on your level of electronics experience. It might cost a little more but you do buy access to their experience which might be what makes or breaks your project or your time frame for operation..

There are others out there - Automation Direct and others but I have zero experience with them.


106
Those Omron Drives and motors are just rebranded Yaskawa parts.

The only other problem you might have is whether they are active High or Active Low signals. What I mean is - Active High is expecting you to supply 24V when you enable it. Active low means you will be pulling the signal to ground when you enable it.

You will also want to check and see how close to 10V your control signal ican get. I have had a CNC unit that only put out 9.5V so I had to adjust that setting in the drive to get max speed.


107
General Mach Discussion / Re: Using Mach3 with Reprap extruder
« on: May 13, 2010, 09:50:31 AM »
I think the best analog between your Reprap extruder and Mach 3 would be to use spindle control for the extruder. S98.2 m3 would replace the first E98.2. Use the spindle as the extruder control as the spindle output is not tied to any axis motion. In other words - you can at MDI type S98 M3 and the extruder would run, and just type M5 and the extruder would stop.  This would also let you use the spindle override feature to adjust the extruder feed rate if it is not putting out the correct amount of material and this would keep it independant of axis motion, or you could adjust axis feed override without altering the extruder rate. Either option would result in changes to how teh materiel is deposited.

I am assuming that the extruder runs independent of the other axis like the spindle does on a milling machine.

108
General Mach Discussion / Re: loss of control
« on: May 13, 2010, 09:32:22 AM »
After you configured it did you select Save Config at teh end of the config menu?

It can be a real pain at times, but if you completely screw up your config and don't select Save config it means that all you have to do is restart Mach3 to get back your machine.

There are a few other places where you have to do something similar, but it is really done that way so you have to deliberately save stuff that will alter your machines behaviour.

109
General Mach Discussion / Re: Router driving into wood and bed
« on: May 07, 2010, 06:03:03 PM »
A few questions -

Is there a g41 or G42  ahead of the line where this happens? I have had a couple times where I got strange results because of something not quite right when I used Cutter Left/Right. Not lately, not sure whether the problem is gone, or I am just writing better gcode...

Have you tried going to the toolpath screen and hitting Simul;ate Run - I have had a few times where this cleaned up the display and made things run better.

Is this on the first run of the day? If the machine was not in a good position when you started you might want to move it to a good area in the middle of travel and then exit and restart Mach3.

Can you post the code so we can see what it looks like?

Does the Z display show agree that the cutter is way below zero or is it at some bizarre position? Could be you are starting with bad values in one of the g54 through g59 settings. Check the offsets page and make sure there are no odd numbers there before you start. ( a set of MDI lines with G90 for the first one, and then G92 X0 Y0 Z0 can clean them up, just resets the current position to 0,0,0)

The reason I ask a bunch of questions is not that I am a Mach3 Guru, but because the biggest problem with diagnosing a problem is a lack of details so everyone makes a bunch of guesses and they may or may not provide any benefit.

110
General Mach Discussion / Re: paper guillotine back fence
« on: May 07, 2010, 05:49:55 PM »
Big question is what kind of drives are you using? Some drives have much of the needed power built in. You might be able to do all the control through a serial port.

 As far as program requirements - for controlling a 1 axis fence it would be fairly easy to write a program for an older DOS only machine that would position the fence, have presets , and be able to move to a user enterred position. Would even be possible to have it do a sequence of moves based on inputs (also through the printer port or keyboard)

Mach3 is a bit of overkill for the application, but it would not require much programming to use it, as long as you weren't trying to create too many special buttons and other functions that are not typical in a CNC machine.

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