topic Re: Posting for linear output, instead of rotational 4th axis motion in HSM Post Processor Forum

Posting for linear output, instead of rotational 4th axis motion

Anonymous — Fri, 29 Mar 2019 14:43:49 GMT

I have an older machine which, I assume, needs to have the 4th axis values

posted as linear instead of rotational.

What is the post processor syntax for this?

The 4 axis machine configuration guide on the site, here, merely states :

actuator: Specifies that the actuator type (ie. either "linear" or "rotational").
The default is "rotational".

What are some examples of how to set this up?

Currently, in my onOpen section, I have :

function onOpen() {

if (true) { // note: setup your machine here
var aAxis = createAxis({coordinate:0, table:true, axis:[-1, 0, 0], range:[-360,360], preference:0});
machineConfiguration = new MachineConfiguration(aAxis);

setMachineConfiguration(machineConfiguration);
optimizeMachineAngles2(1); // TCP mode

Thanks....

Re: Posting for linear output, instead of rotational 4th axis motion

Anonymous — Wed, 03 Apr 2019 11:47:01 GMT

...perhaps there is a few lines of javascript from another post-processor

that converts degrees to linear movement that my 4-axis Bostomatic 300

series machine needs... ?

...or somewhere within the existing 4-axis standard setup needs some parameters changed...?

...anyone have a lead on this?

...thanks...

Re: Posting for linear output, instead of rotational 4th axis motion

Anonymous — Wed, 10 Apr 2019 11:56:29 GMT

...so... how difficult would it be to figure out the "rotation to linear" problem, here?

Is there a javascript reference manual where I could find the solution for the post

to do the math for this? Would this be many lines of code, or just a simple equation?

...any help would be much appreciated...

Re: Posting for linear output, instead of rotational 4th axis motion

bob.schultz — Wed, 10 Apr 2019 21:53:36 GMT

Could you provide sample code of what your machine expects to see? For example, if you move from 0 degrees to 90 degrees what does the output look like. From 0 to 360 degrees, to 390 degrees, etc.

Specifying that your machine requires "linear" output for a rotary axis does not really explain the situation. It could mean that it moves on a linear scale (0-720 would rotate the table twice in the CLW direction), or that the table is programmed using a predefined linear circumference, or something else entirely. So you can see where more information is needed.

Thanks

Re: Posting for linear output, instead of rotational 4th axis motion

Anonymous — Fri, 12 Apr 2019 13:18:20 GMT

Bob :

Thank you for the reply.

The post needs to do the math based on a diameter chosen.
The default diameter of my Bostomatic 300 Series SPCII Control is 80.8507mm, or a 254mm circumference.
The post then needs to calculate the mm of circumference based on the angle and the diameter.

Below is some sample code, currently posting for A incorrectly in degrees :

%
G90G17
G1Z50.8R
G49R
2D POCKET2
T15M0 TOOL 15 :
S100M3
G4X4.
G48R
M8
G1X-2.031Y0.R
Z15.744R
G1A2.053
Z11.744
Z11.295F381
X-2.032Z11.284A2.051
X-2.035Z11.274A2.046
X-2.04Z11.265A2.038
X-2.047Z11.257A2.027
X-2.055Z11.251A2.014
X-2.064Z11.247A2.
X-2.074Z11.244A1.984
X-2.077A1.978
X-2.084A1.955
X-2.089Z11.243A1.924
X-2.092A1.886
X-2.093A1.845
Z11.238A1.384
Z11.233A0.923
Z11.229A0.461
Z11.224A0.
Z11.22A-0.461
Z11.215A-0.922
Z11.211A-1.384
Z11.206A-1.845
X-2.092A-1.89
X-2.088Z11.205A-1.93
X-2.082A-1.962
X-2.074Z11.204A-1.982
X-2.022Z11.202A-2.068
X-2.014Z11.201A-2.075
X-2.006A-2.068
X-1.999Z11.2A-2.05

Re: Posting for linear output, instead of rotational 4th axis motion

bob.schultz — Mon, 15 Apr 2019 15:15:16 GMT

You can output the rotary axis positions on a linear scale based on a circumference of 254mm by making the following change in the definition of the rotary axes format. Find the following line at the top of the post processor ...

var abcFormat = createFormat({decimals:3, forceDecimal:true, scale:DEG});

... and change it to the following.

var abcFormat = createFormat({decimals:3, forceDecimal:true, scale:(254/(Math.PI*2))});