Discussion on simple / complex machine tools applications

Hi all,
This is the place for all machine tool guys in the industry. Kindly feel free to tell us abt. your machine tools applications, simple or complex, general or special purpose. Also don't hesitate to ask any questions abt. machine automation using LabVIEW and NI motion control products.
Best of Luck.
Regards,
Giridhar Rajan
Automation Engineer
Cruiser Controls
Mumbai, India

This is to remind everyone that the Circular Arc Challenge is still open. Here's the question again below. Check it out. Lets see who solves it.
Hi,
This is an amazing motion control challnge that I'm putting forward to u guys. I am currently using NI PCI7344 motion controller for 3 axis + spindle motion control system. Before this I have used Fanuc and Fagor CNC controllers which understand G-codes and M-codes. Now, in my application, I want to do simple two axis circular interpolation to draw an arc. LabVIEW provides a VI for drawing an arc. We need to provide the "Start angle", "Travel angle" and "Radius" for drawing an arc using that VI. I'm trying to develop a VI, where I feed the "target position", "radius" and "Clock Wise/Anticlock Wise" to draw an arc. The fanuc and fagor controllers provide this facility. Lets see how NI can compete with them. My application involves parsing and transalation of G-codes and M-codes. If this is done, then using my application, a user can feed the same G-codes and M-codes that are understood by Fanuc and Fagor CNC controllers. This will help eliminate CNC and make people buy PC Based controllers. In this way engineers all over the world, who are conversant with G-codes and M-codes can easily shift towards PC Based control which is much easy to use and upgrade. Hence its a challenge for all motion control guys in the industry to try implement this one and provide me with a VI.
Regards,
Giridhar Rajan
Automation Engineer,
Cruiser Controls
Mumbai, India

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kknr wrote:
Hi all,
we are using the following EBS & Database
Database Server
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Oracle Applications : 12.1.2
i would like to send the file as a attachment using client machine outlook application.
the(.TXT) file has generated by the concurrent program and stored in the oracle server in specific oracle DB directory path. now my requirement is after generating the file then same file has to send mail to specific mail id using client machine outlook application.can anybody suggest me how to do this
(i tried to send mail using UTL_SMTP.DATA but this standard procedure is allowing the file attachment size up to KB only.)
Thanks in advance.Please see old threads for the same topic/discussion.
https://forums.oracle.com/forums/search.jspa?threadID=&q=Send+AND+Email+AND+Attachment+AND+Concurrent&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
https://forums.oracle.com/forums/search.jspa?threadID=&q=Send+AND+Email+AND+Output+AND+Concurrent&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
Thanks,
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Program that sends G-code pages to a machine tool's controller

I am looking for some advice and examples (if possible) of programs that are able to send G-code programs to a CNC machine's controller.
In other words I would like to build a program that could send the G-code program to the CNC brain of a machine tool (possibly through the serial port of the computer) . Also, I would like to read back programs from the CNC brain of a machine tool, bring them on the screen and possibly write an ASCII file that could be opened with notepad or word.
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I think you want to use the parallel port rather than the serial port. I've done what I think you want to do, but not in LabView.
I have a Taig benchtop milling machine that I built my own stepper control box for (based on the allegro chips). It like every hobby CNC machine I've seen uses step and direction lines for each axis. IE, when the direction line is pulled high, each pulse on the step line moves one direction, when the direction line is pulled low, each pulse moves the stepper the other way. This very low-level of control is quite popular in CNC machine tools and allows the controller to blend axes for circles etc.
You've got a couple issues with trying to do this level of stepper control with LabView, the main issue is windows itself, the latencies out the parallel port is quite long due to the hardware abstraction layer in windows. Second is the lack of determinism in windows. So even after your pulses (IE data) start spewing out the serial port, there is no guarantee that all your data will come out in a smooth consistent manner. Rather, there will be a splatter of data, a pause while windows does something else, then another splatter of data.
This is a real issue when controlling either steppers or servos with step and direction type of controls. Because the step pulse train is directly linked to motor speed. Any fast changes in the pulse train period will cause motor stalls or other very undesirable behavior. You can get around this to some extent by working very slowly.
My workaround is to use TurboCNC (you get the source code when you register), which is a turboPascal program that runs in DOS. DOS is so simple that it's quite deterministic and you can get nice consistent pulse trains out the parallel port. I use various windows programs to build my parts, and generate G-Code (Autodesk inventer, meshcam, MasterCam, etc). I've also written some, not-for-prime-time, Labview routines to edit G-code, view toolpaths, and unroll loops, etc.
To use a non-real-time OS to control real-time critical tools like this, you can always build a hardware buffer. Imagine a hardware Queue where your pulses are pushed into one side of the queue sporadically, and a hardware clock pops them out of the queue to your controller in nice smooth increments. I've been toying with building such a thing, but honestly, the DOS turboCNC program works so well that it's not high on my list.
The beauty of DOS and turboCNC is that you can use a $40 small laptop to control your machine. I have a 486 HP laptop sitting on top of my controller next to my mill. Small, cheap and effective, everything I want.
Pushing your data out of the parallel port is fairly easy in LabView, and parsing G-code is also quite easy, but before you spend much time on it, make sure the data coming out your parallel port is suitable for your needs from a timing standpoint.
Hope that helps,
Sheldon
Message Edited by Sheldon Stokes on 09-27-2005 09:01 AM
Technical geek, engineer, research scientist, biodegradable...

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On the basic setup tab make the changes shown below:
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Then when you set your laptop's wireless adapter to whatever IP network you want to connect to.
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Please remember to Kudo those that help you.
Linksys
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Using LV2009 + WIN7+Pentium 4 @ 2.5Ghz with 3 GB RAM.
I have a machine control code inside a 10mS main loop that has 7 ( yes seven ) Queued State Machines ( QSM) and I find the Finished Late boolen keeeps poppping often. Not a very good sign if you ask me.
And the code itself does not have too much of computation or FP activity. But it has four Graphs with one plot on each of them. These are updated once every 10ms. Can slowing this update ( say once every 250ms ? ) help ?
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I think your question demonstrates my point. Unfortunately, I don't have a good example to point you to and don't have the time to write one. I will try to explain better. Let's take a simple example - a landscape watering controller (sprinkler controller). This controller will have several states (e.g. initializing, waiting, watering, closing). Each of these states will accept several commands, but not all commands are accepted in all states. For example, if the system is watering, a command to start watering could be ignored.
In most programs, at least some states should be interruptible. For example, if it starts to rain, the watering system should stop watering immediately instead of watering for a set length of time. However, if the system is in the initialization state, this will probably not be interruptible (but also short).
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So how do LabVIEW classes help? They can eliminate one or both levels of these case structures through the use of dynamic dispatch. This is done as follows. A parent class is created that is a generic command. It has commands for each state. For each actual command, a class is derived from the parent class. There are VIs in the specific command class for each state. A command is generated by creating the correct object for the current state, then calling the parent class command. Dynamic dispatch will execute the code for the correct command. The command execution loop is then reduced to a single command VI which dynamically dispatches based on the actual command and the current state.
In practice, things as usually not quite this simple, and you may want different cases for either different commands or different states so that you can change the connector pane of the dynamically dispatched VI as needed. Look up the LabVIEW examples on dynamic dispatch to see this in action.
I am afraid I have still not made myself clear. Keep asking questions and I will try to keep answering.
This account is no longer active. Contact ShadesOfGray for current posts and information.

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PP Module: Machine tool industry scenario

Hi Gurus,
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Which can be produced in-house or purchased. Each of these sub assemblies have
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1. Planned/production orders for materials to be produced in-house.
2. Planned orders/purchase requisition for materials to be purchased from Vendors.
3. Some PR (or return sales orders or some other document) to get material from the Customer
so that we are able to follow-up incase he delays sending the materials.
4. In case the sub-assembly is to be purchased the system should not give production orders for its child parts.
Kindly suggest how to map a solution of this scenario.
Shud I make Sales order BOM or variant configuration or what ?
Thanks and Regards,
Vishal Saha

Hi,
After the completion of Sale order, you wil come to know about the scope of work to be taken by the manufacturer i.e) the items to be manufactured in-house and to be extenally procured. So, in material master you wil define the type of Procurement.
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Hope this gives you some hint to proceed further...
-Thaila Shree

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Attachments:
Untitled.png ‏51 KB

Sorry for the double post:
Because this is a third party add-on and you are using VIPM, I would also suggest contacting JKI for support. I have listed their support website below:
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Hi
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