Linuxcnc jog

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Linuxcnc jog

The axis jog at a proportional speed to how far you push the stick and it is super easy to set up. I placed all the code in my postgui. That one was put in my main. This way the pins have been created by the time you get to the postgui. If your adding functions like or2 etc and you all ready have some in use just adjust the count and reference number to suit your configuration. Step 1 Find out if your joypad is compatible [Here] is how to check if your joypad outputs the right values.

Pick one of the names that is unique and use it. Step 4 Check the pin names of your device Start up EMC after adding the above lines to make sure that works. The pin names you are looking for are similar to "input. The number is units per minute. If you use this line skip the rest of this section. If you use the rest of this section skip this line!

This is my preferred way to use it.

linuxcnc jog

In your postgui. Step 6 Set up the Axis Add the following to your postgui. Reverse any Axis that go in the wrong direction To reverse the direction of an axis add the following, in my case both Y and Z were backwards.

Step 7 Using the Joypad to jog your machine. It will not work when the MDI tab is selected 2 You must press and hold a number button then move the joystick to get movement.

Once it starts moving you can release the number, but as soon as you stop you have to press the number again before any movement will happen.

linuxcnc jog

Prepared a one line file as per the description in the man page. Follow the BasicSteps to edit pages.I used a joypad because it has four axes while standard joysticks would have only two. Why use a joypad?

With analog you will be able to move your machine proportionally to the little joysticks movements, while the digital input is like an on-off command. With the digital output you can also use the pad on the left. I'm pretty sure that better results in terms of sensibility and precision could be obtained with a higher quality joypad.

If everything was right, let's understand how it works. Emc2 provides a sim-encoder and an encoder hal components. More about them can be found [here].

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The component sim-encoder is a simulated quadrature rotary encoder. It has an input pin for the rotational speed of the simulated shaft and two output pins for the Phase-A and Phase-B quadrature signals. So it has two input pins for Phase-A and Phase-B and an output pin that gives a signed integer that represents the count of impulses. The idea is actually very simple: link the joypad axis pin, that outputs a float value, to the speed pin of the sim-encodernow link its Phase-A and Phase-B output to the correspondent input in the encoder.

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Its output will give the counts that will be linked to the axis jog count pin and will let your machine move. Repeat this for X Y and Z. The scheme below shows the hal configuration for X axis: Of course writing a new hal component that converts directly the float input from joypad axis to an integer counter output is possible and easybut this requires more knowledge, while the method described here only requires components that are already provided with EMC2.

Also using that method it is easy to update the system from joypad to a jogwheel. If you are interested in how to write the new hal component described, [here] you will find instructions. Now we will examine the hal file needed to do that. If you're still not familiar with HAL, I suggest you to read the [Hal Manual] that has very helpful tutorials in it that allow you to understand very well how HAL works.

Now we link all the three used joypad axes to the speed pin of the simulated encoders: net velX joypad. Just save it for example with the name pad. We will see two examples, in the first we will use two buttons to set the jog scale parameter; pressing the first button will set it to 0.

In the second example we will use only one button to toggle flood on and off. To do that we will use [Halui]. Jog-Scale buttons We set two buttons, button 6 and button 4 to change the jogscale value.

To do that we use two HAL components, a flipflop and a two values selector mux2. We will link button 6 and button 4 pins to the flipflop set and reset pins. The scheme below explain how it works: Let's see how to do that with HAL: First load components: loadrt mux2 loadrt flipflop Create links between buttons and flipflop: net button4 joypad.

To do that we will use three HAL components, two and2 and one not. We will use three halui pins for that: halui. Now we will link the button 7 pin to the and2.If your configuration is not currently set up to use AXIS, you can change it by editing the. Later, this area will display the path the CNC machine has moved through, called the backplot. Manual Control Tab - which allows you to make the machine move, turn the spindle on or off, and turn the coolant on or off if included in the ini file.

MDI Tab - where G-code programs can be entered manually, one line at a time.

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Feed Override - which allows you to scale the speed of programmed motions. Jog Speed - which allows you to set the jog speed within the limits set in the ini file. Max Velocity - which allows you to restrict the maximum velocity of all programmed motions except spindle synchronized motion.

A status bar which shows the state of the machine. In this screen shot, the machine is turned on, does not have a tool inserted, and the displayed position is Relative showing all offsetsand Actual showing feedback position.

Simple Remote Pendant using a $10-20 joypad with halui and hal_input

Some menu items might be grayed out depending on how you have your. For more information on configuration see the INI Chapter. If you have configured LinuxCNC to use a filter program you can also open it up.

Edit… - Open the current G code file for editing if you have an editor configured in your ini file. Reload - Reload the current g code file. If you edited it you must reload it for the changes to take affect. If you stop a file and want to start from the beginning then reload the file. The toolbar reload is the same as the menu.

Properties - The sum of the rapid and feed moves. Does not factor in acceleration, blending or path mode so time reported will never be less than the actual run time. Edit tool table… - Same as Edit if you have defined an editor you can open the tool table and edit it.

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Ladder editor - If you have loaded Classic Ladder you can edit it from here. See the Classicladder Chapter for more information. Run From Selected Line - Select the line you want to start from first. Use with caution as this will move the tool to the expected position before the line first then it will execute the rest of the code. Stop - Stop a running program. When run is selected after a stop the program will start from the beginning.

Stop at M1 - If an M1 is reached, and this is checked, program execution will stop on the M1 line.

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Press Resume to continue. Calibration - Starts the Servo Axis Calibration assistant. Set Debug Level - Opens a window where debug levels can be viewed and some can be set. Tool touch off to workpiece - When performing Touch Off, the value entered is relative to the current workpiece G5x coordinate system, as modified by the axis offset G When the Touch Off is complete, the Relative coordinate for the chosen axis will become the value entered.Jog-while-pause changes to motion what it is An enhancement to the motion pause handling to: enable jog moves during auto pause in coordinated mode, that is axes, not joints un-pausing will return to the position where 'pause' was hit, then continue the auto run hitting 'step' will just return to the pause position and stop otherwise, 'pause' and 'step' should behave as before inputting jog offsets and feeds happens through HAL pins feed override keeps working during jog moves in pause mode as usual.

All it does is provide the HAL hooks to provide these features, but it doesnt do so by itself. This is experimental, and needs some shakeout. Until then, some HAL plumbing is needed, it isnt yet clear to me how jogging in coordinated mode fits in the overall picture. This is a fundamental restriction in current linuxcnc and forcing the issue would have some serious side effects.

MDI during pause. As far as the rest of linuxcnc is concerned, jog-while-paused is not visible - it all looks like a loooong pause. This modification assures that at resume happens at the point where where 'pause' was hit. These changes rely on the current 'pause' capabilities. I use 'IPP' to mean the 'inital pause position', which is the pose where the pause request was honored and state changed from running to paused.

Status pins: motion. Updated during states 1 and 2. Control pins: motion. Deasserting pause-offset-enable before the target is reached causes an immediate stop of motion. The Axis 'Step' button resumes the pause for the current motion if paused in the initial pause position.

If not in the initial pause position, it triggers a return move. Changes in behaviour: The DRO values for velocity, and distance-to-go are set to zero during a pause, and thereafter reflect velocity and DTG of the jog moves.

On resume the velocity and DTG values of the initial paused move are restored. Deficiencies and surprises There's currently no support for spindle, mist, flood handling etc during pause.

Some HAL plumbing required for now.

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I dont know how to handle a rotary indexer during jog. Programming notes The basic approach is to employ an alternate motion queue - on pause, motion control is switched to the alternate queue, and arbitrary moves can be executed. Switchback to the primary motion queue happens on 'resume'; if the current pose doesnt match where execution was paused, a linear move to the pause point is executed.

Then primary motion queue execution continues as before. Any state other than 'not paused' is nonzero which is compatible with current task assumptions. The semantics of 'step' are now such that if paused on the inital pause position, a return move to the initial pause position is executed. That seemed the most logical step to me.There is a lot more you can do with a joypad. This shows how to create a one-shot jog with your joypad and how to link in some halui functions like spindle control.

If you look closely, you will notice that this joypad. The comments in this file should be enough to explain the system. Remember that this probably won't work on your computer until you change the parameters to match your specific joypad. Normally, the two joysticks will move the three axes freely. When one of the buttons is pressed, it will shift to a jog mode and move once in the direction of the pressed axis. This file may seem daunting at first, but if you read just one section, then it will be much easier.

We will decode those signals with an encoder component for X Y Z and will send the result counts value to the axis jog pin for X Y Z. Dual here refers to a unique identifier for the particular joypad that we're using.

EMC2 map: 1 input.

linuxcnc jog

To check the mapping, enter "loadusr halmeter -s pin input. In order to see what button or axes does what, you will have to waggle the joystick and write it down. There's no other way. We'll require some number of components. Since we have to measure the axes twice, we have to use both.

The first section is float, the second is s If you use halmeter to check the axis values, the reason for these values will become very clear. Note that calibration will not let you get away without a deadband. Note that these will be converted to floats.

linuxcnc jog

The order isn't relevant since human reaction speed is so much lower than the thread duration. The servo-thread isso the edge is set to 10x that. This gives us a nice, long pulse which is easily detectable by the thread and is also usable in other calculations. You can lower this if you'd like, but you'll find that you'll get intermittent jogging. It will move once every presses instead of every press. It does NOT change the jog amount - it's still a one-shot with the width set below in the jog speed section.

Set up the one-shot pulses. This will allow a jog at just one increment. Window is - setp wcomp. A window comparator will tell you if there IS a trigger, not which direction the pulse should go. That's where the invert output comes in.Please Log in or Create an account to join the conversation. Duc wrote: I can see the jog-speed vary in the Hal but no change in the jog-speed slider no the overall jog speed while moving a axis.

Well that means you have only 2 wires from the potentiometer connected, or you have all 3 wires connected but at wrong places. That is if the analogue input on the mesa card is for 24V. After you test and it works, only after it works see if it is correctly wired to up the speed as you turn it right. Do not under any circumstances wire the middle potentiometer pin to anything else except the analogue input on the card. Just in case you find out that the potentiometer does not adjust speed linearly, check to see if it is a linear or logarithmic version, you need it to be linear.

If it is linear and it still does not adjust properly, change the potentiometer, as that is a sure sign that it is fried due to miss wiring. Phew, that should be all the possibilities of wiring a potentiometer. I do not see anything change for the jog-speed when I adjust the knob. Toggle Navigation. Index Recent Topics Search www. Jog speed using potentiometer. Start Prev 1 2 Next End. Looking to use a potentiometer to set the jog speed for the axis movement instead of using the bar slider on the screen.

Running into a few issues into the setup. So far I have a 10K pot that reads from Last edit: 14 Nov by BigJohnT. Not my forte but, You mention that the voltage changes from I am not particularly clear what you are trying to do, looking at the HAL.

You have a lot of mux components for setting the MPG jog rates. I assume that is working? But, you also seem to be trying to use the analog input to set the keyboard? I don't know if any of them allow you to set the jog slider from an external input because the on-screen slider has no way to do the reverse, move the physical knob. I don't know if any of them allow you to set the jog slider from an external input because the on-screen slider has no way to do the reverse, move the physical knob Using AXIS All the mux are working fine MPG jog rates, spindle rpm and feed override.

Jog-while-pause changes to motion

The end game for the setup is a switch to turn a jog on like what is used on a manual mill equipped with a power drive unit. There is a difference between an MPG and a potentiometer. A potentiometer is an absolute device and an MPG is a relative device.

This means that an MPG and a GUI slider can work together to alter a setting, this isn't possible with a potentiometer. Would it be possible to use a small encoder in place of the potentiometer? There are some low-count ones available in the same form-factor as the pot. You can count those perfectly OK with a software encoder counter in HAL running in the servo thread, you won't make clicks per second if you have run out of MPG inputs on your cards.Well, you live somewhere.

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