CAD/CAM software is a combination of computer-aided design (CAD) software and computer-aided machining (CAM) software. This documentation seems to me to be written for advanced users. Step 3: ), and Implied Post Blocks. You've got to know the CAM System itself (how the data is created in the "generic" format), the Post Language that is used by the post processor, and the proper syntax for the NC code that will be run on the machine. This is a Literal String, which means the output is just forces to the NC output line. Once we evaluate all the Parameters and post block calls, we return to the same point from where the calling began, and process the next Parameter. In addition to creating the NC Code, you can simulate and verify the code "virtually" inside their software package. Now here is my meaning: the company I bought the machine from DO NOT provide the post.
Hi Steven, I don't have any experience with MeshCAM. We are the largest and most active discussion forum for manufacturing industry. I happen to know a guy (me), who is Post Processor Wizard, and could get your Post setup for 100% Post-and-Run NC Code, with zero hand-edits October 13, 2016 in Post Processor Development Forum. They do this by being written on the NCI 1011 and 1012 Gcode lines. I plane to take the coursed Eapprentice provides in the near future. With Numeric Variables in MP, you set the "current" value. check out the. Good luck in your search. The output produced by the post processor should be usable without any further modifications. And, if you got through the Great Wall of Text, that hopefully helps explain a few things Colin, I appreciate your patients. Why do some lines start with a P and some dont.
Step 2: 
Colin Gilchrist. The function looks at the value of absinc$, and based on the Modality , it picks a String from the String List, using the value of absinc$ as the index to the String List. Do you have a legal license of Mastercam? The 'absinc$' variable is used as the Selector Variable in a String Select Function for outputting either Absolute (G90) or Incremental (G91) codes. While this can be expensive as well, I prefer to think of it as an investment in your company's capabilities, and consider it a competitive advantage. If you use the Mastercam Code Expert editor (MCE), you get "auto-highlighting" of the pre-defined variables and blocks. This indicates that the values is automatically recognized by MP, and that MP is what creates it. That means if you type in the name of a pre-defined variable, and you spell it correctly, it will turn Blue automatically (in the case of a numeric variable), Purple in the case of a String, and Red in the case of a pre-defined Post Block.
It's kind of there own language where they have some of there own functions. MP normally only allows "one line" of processing after the Boolean test results. Thanks. Each client benefits from ongoing development as the Unified Post Kernelis enhanced to support new Mastercam functionality, while simultaneously appreciating the high level of customization possible with Mastercam's MP post processor programming language. ", "Y0. colin@eapprentice.net When you make a hand-edit to a NC Program, you have broken the direct link between the CAM Program that produced the motion, and the NC code that is producing your part. Ints.). Step 3: This is a Post Line with multiple "Output Parameters". If you have an account, sign in now to post with your account. Hi Eric, your best bet would be to contact Autodesk, for help with a Fusion 360 Post. There should really only be a single post for each machine in the shop, and this post should be modified for the way your company produces its parts. With a Generic Mastercam Post, there is logic that is setup to read data from the NCI file, and based on that data, it outputs your NC file. Pasted as rich text. This means the post developer created them, and they are not pre-defined by MP. On the face, there is nothing wrong with this method. There are several companies that develop their own Post Solutions (as opposed to a "native" CAM Post Processor that is specific to a particular CAM Software). 
Custom drill cycles - e.g. It may, or may not output depending on modality), Finally, the last line of code is Variable Assignment, that restores the value of absinc$ to the saved value. Besides the potential downtime from a crash, making hand-edits takes valuable time away from your Programmer, and increases their stress level. You can post now and register later. Disclaimer: I've taught Post Processor Courses for Mastercam CAD/CAM Software for the past 5 years, and have been developing my own Post Processors for Mastercam since 2001 To view or add a comment, sign in I understand some of the individual components but how do they work together? Until it stops, we will continue to fight uphill battles. If something starts in the first column (a string, numeric, function, postblock), it is the "definition" of that "thing". Display as a link instead. Must be someone out there that knows about post processor. Strangely, it couldn't rigid tap out of the box, and since I live in 2019 and not 1750 and I use the metric system, G95 (feed per revolution) made the most sense to me. It scans through the PST lines and it creates Variable Definitions (locations in memory with an "address" (where is it) and default value (what is stored). Make sure you have a backup of your post and thoroughly test any changes you make. Now, most 5 Axis Programmers that I know probably have a burdened rate that is easily twice that amount, factoring in their higher hourly or salaried rate, plus the benefits and taxes. The String Select functions are either forced, or are dependent on Modality.
I am looking for a source to help me learn the basics of this language. ", e$ pfbld, n$, *sg28ref, "X0. New posts will be added to the folder, but updated posts will overwrite the old versions. Call them and ask them if they could send you a copy.
The post can even call another "jump" from there, and go do more processing. The next Tool Change is either a NCI Gcode 1000 (tool is the same tool as last op, otherwise known as a "Null Tool Change"), or the value is NCI Gcode 1002, which represents an "Actual" tool change, and we call a different block. 
After the Pre-Read is complete, the PST will read the NCI again in an "output loop" where data is written to the NC file. The thing that "identifies" a Post Block is the name of that post block, which typically starts with "p" and only "p". It needs a comment (TOOL_UNCLAMP_NOW) and an M0 directly after a tool change to T100, and then after the cuts and a G28 G91 Z0 G90, it needs an M5 and then the same comment and M0. So starting the post block "psof$" in the first column identifies it as the beginning of a block of code. I see now your class will benefit me.
Step 1:
Where would you go to learn how to create and edit posts? There are two additional Output Post Lines: pfbld, n$, *sg28ref, "X0. (X, Y, Z, I, J, K, and so on). I showed those blocks up above. Step 1: MP is a "column dependent language". ", but it is important to state because it is at the heart of how MP.DLL processes the data. 
The 4th Parameter on the line is: *sg28ref. This is controlled by the user in the Miscellaneous Integers. The 3rd line is: absinc$ = one. Thanks again for all the help and training Colin! I think you will be very happy with what he provides. - Colin Gilchrist. These parameters are separated by commas.
(The PST values can override the MP default values, since the PST file is read 2nd). So 'sgabsinc' could output either "G90" or "G91", at many different places in the post, as it is used on many different Post Lines. This is important, because one of the things you are allows to do is call another subroutine. Is the MP language based on something else with more information such as C+ or Java, etc., or even CNC macro B? Save the files by machine type. In reality, there is nothing wrong with using this business practice. This is important, because it relates to Modality. If we assume a fairly low "burdened rate" of $40 per hour (hourly wage, plus the cost of benefits and taxes), that equates to$10,000 per year of wages paid, just to hand-edit NC code. So typically in the case of "post blocks", the next post block name is what ends the preceding block of code. Mastercam is fed information about the machining operations by the CNC programmers. If you were trying to do this with a Mastercam Post, I could possibly help. MP has a special mechanism called the String Select Function that works with a String Select Table that lets you create a list of string values. Its job is to output a Sequence Number, depending on if Sequence Numbers are enabled. All CNCzone.com Content - Copyright 2019 - All Rights Reserved derek@eapprentice.net Now you've got to get someone inside your company to take over the reins, or you must hire someone new, and they are stuck trying to figure out the process that was used by the old programmer to produce the NC code. Register now to participate in the forums, accessthe download area, buy Mastercam training materials, post processors and more. While $5,000 certainly sounds like a lot of money, that pales in comparison to how much time your CNC Programmer might waste on a yearly basis, making the same hand-edits, over and over again. It does this because we need a mechanism to control output.
Somebody can help? But what is a Post Processor? Which is a function, a variable, and a string? But I never knew the MCE editor has auto-complete fuction for the posts. The third line is: pfbld, n$, sgabsinc, *sg28ref, "Z0. I've always used other editors. The standard indenting inside the Mastercam Generic Posts is 6 spaces before the start of every line. So if you change the value of mi3$ in your operation, the post will change the output for that particular String Select Parameter.
I've seen many companies over the years that rely on their Reseller or a 3rd-Party Post Builder to obtain their posts. If all conditions are meet then the output will happen if not then it will sort through what other conditions need to be answered or completed to then output the needed code. 3D printing is one step in an o twitter.com/i/web/status/1, 3434 RT 22 West, Suite 130 Branchburg, NJ 08876, Mazak Technology Center700 Old County Circle Windsor Locks, CT 06096, HFO - Allendale Machinery 1545 Ocean AveUnit 12Bohemia, NY 11716, Mount Joy Business Center 955 W Main Street, Suite 12 Mount Joy, PA. Without a e$, the line does not break in the NC code file. Your link has been automatically embedded. Somebody has this machine? So, to get back to your sample, we are testing the value of mi1$, and based on if that test is "True", we are executing each line of an Implied Post Block: "if mi1$ <= one, #G92 Local Work coordinate system", This line of code tests the value of 'mi1$' to see if it is "less than, or equal to" the value of the variable "one". Did this fro Esprit and SmartCAM. The site is 100% free to join and use, so join today! The post processor converts the toolpath into language that the machine understands. Post Development is not "easy". gundrilling, slow entry, Probing (custom or Renishaw Productivity+). All pre-defined variables and blocks end with a Dollar Sign ($). You should probably add Jim Evans and Roger Peterson to that list as well. The 3D CAD model is imported into Mastercam. Use your display name or email address to sign in: By If the value is different, it triggers MP to write the variable to the NC output, and it then "updates" the variable. Let's examine it: The first line starts with some Boolean Logic that tests the value of the Numeric Variable mi1$. Post Blocks are chunks of code that are executed, based on the Trigger or "Call" to that block. If not, I will likely just post here with specific questions.
I still have a long way to go to do some of the stuff guys on here talk about. Colin since reading your write up several times through I am understanding my reading more and more. The first Parameter on the line is (pfbld). Happy New Year for all of us! The second line is: [. Making hand-edits to your NC code breaks the link between the CAM program, and the code being run on the machine. Even if you write two lines of output parameters, the line will continue as a single line of NC code until you encounter a e$. Many modern computer languages have many different data types (data structures) which determine the type of data they hold, and what operations you can perform on them. Register now to participate in the forums, accessthe download area, buy Mastercam training materials, post processors and more. X8? This is the start of the implied post block. An Implied Post Block is created typically to allow "multiple actions" to follow the result of a single "Logic Test". (More if your shop rate, up-time, or days per week are increased). In addition to the costs of hand-editing the code itself, making these edits is a scary proposition for all but the most foolhardy of CNC Programmers. ), If your shop rate was $100 per hour (usually more for high-end equipment, but let's use that number for our example), and you run 2 shifts a day, that's 16 hours of billable time per day. The code is exported to the machine, and the manufacturing process begins. Based on the value of that variable, we are controlling the output of Absolute or Incremental coordinates for Motion as well. Mastercam Code Expert has had the "color coding" for pre-defined variables for much longer, but that only really helped with spelling errors. lowcountrycamo, Here, we are using the String Select function because there are multiple lines where we want "G91" output, and there is an existing mechanism inside MP to do this for us. Post processing is an important yet often overlooked step in the CAD/CAM/CNC process. Step 2: There aren't many sources for MP Post courses these days. Postability's Unified Post Kernel represents a step forward in Mastercam post development. By the way, it is certainly possible to machine STL Files, inside Mastercam. You do not need to force string variables. How did you learn this work? Hey, I know a guy who is not only a wizard but he teaches other people how to be wizards. ", e$ pfbld, n$, sg92, *xh$, *yh$, *zh$, e$, Both of these lines are evaluated, from left to right, and the same process happens. There is a Target Variable, which is a String, that gets its value changed constantly, based on the modality of the Selector Variable. The Post Processor is the fundamental link between the work you do inside your CAM system, and the machine that is removing the metal. My post editing results in a lot of trial and error. I try to read through most of the topics because I never know when I will learn something new. They will provide you with a Post Processor Request Form, which you can then fill out with your machine information. Step 4: Together,we are the strongest Mastercam community on the web with over 56,000 members, and our online store offers a wide selection of training materials for all applications and skill levels. This is an error-prone and dangerous process. Please correct the marked field(s) below. This is what tells MP that it is a "post line" and not a new definition. I know that probably sounds like "yeah, I already knew that, that doesn't help! That is 5 hours per week that you would spend on hand editing your code. MP is "old school" in that it only holds String Data or Numeric Data. ", e$. Mastercam's post processors are not really any specific programming language. These values are stored in variables by MP, and allow you to use them with Boolean Logic to make decisions inside the PST file. I'll have to give that a whirl. ", e$ pfbld, n$, sg92, *xh$, *yh$, *zh$, e$ absinc$ = sav_absinc ], pfbld = force block delete? TIn the MP Language, Post Blocks are "subroutines" that function very similar to a "G65" call in Macro B. The only thing that "ends" a post block is a new definition, which always starts in the first column. It produces anxiety when you can't trust your NC Program to run the machine without error. Hi Bradley, please email: There is a PDF reference guide available from your local Mastercam dealer. Need help to finish my G code processor. The best post processors optimize machining.
'absinc$' does more than this though. Because of Modality. (A Lathe or Mill-Turn post might have "m" or "l" as the starting block characters to indicate "mill" or "lathe" processing.). The function will output a given string from the string list, based on the modality of a numeric variable.
I doubt you'll find a "free" Post available. I now keep a backup and a note with each change I make in case I have a problem later on. Have you contacted your Reseller for help? You can apply any of the roughing and finishing paths, although the surface quality is limited to the resolution of your original STL mesh Hi Colin, do you post processing classes for Edgecam ? (won't turn "blue" if it is spelled wrong when entering a pre-defined variable). This is because the MCE editor has "auto-complete" functionality for all of the pre-defined variables, functions, and strings. So that's kind of a quick overview of Strings and Numeric Variables and related functions. The programmer makes an edit, and then posts the NC code for the current job they are running. This spacing isn't required, but greatly recommended as it helps with readability of the code when making edits.
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