Placement of components triggering limit switch

[randomtinker]

I'm trying to get setup the liteplacer. I think i have done the needle calibration right

liteplacer screenshot after calibration.png (452.87 KiB) Viewed 7383 times

(The video of calibration is here: https://drive.google.com/drive/folders/ ... sp=sharing

This video shows the pickup of a component and placement operation: https://drive.google.com/drive/folders/ ... sp=sharing. The pickup is working as expected, but during placement, the switch doesn't disengage fast enough.

These are the buttons i'm using for pick and place

Pickup place buttons .png (48.46 KiB) Viewed 7383 times

The other issue is that the z height for the placement is not being honored. The needle is always going all the way in and triggering the switch to find the z height? It shouldn't do that if there is a z height set for the component right ?

placement z.png (69.45 KiB) Viewed 7383 times

[JuKu]

Please correct me if I understood the issues wrong and I’m answering off-topic.

With the speed of the switch, I think you mean that the head doesn’t stop fast enough after the switch triggers. That is controlled by homing acceleration. (The height measurement function (probing) uses the same method as homing, but down).

Also, when you use the “manual” pickup and place buttons, the software doesn’t know what it is picking up, therefore it probes always. The z heights are used when the operation is used on a known part; in other words, on the run job page buttons.

[randomtinker]

Please correct me if I understood the issues wrong and I’m answering off-topic.

With the speed of the switch, I think you mean that the head doesn’t stop fast enough after the switch triggers. That is controlled by homing acceleration. (The height measurement function (probing) uses the same method as homing, but down).

I was mostly copying your values on the website screenshot. But I'll try increasing the acceleration. Any downside to going 2-3 times higher than default one ?

Also, when you use the “manual” pickup and place buttons, the software doesn’t know what it is picking up, therefore it probes always. The z heights are used when the operation is used on a known part; in other words, on the run job page buttons.

Makes sense. But the question still remains on whether the pick operation and place operation is differently handled ? The switch trigged correctly during the pick operation, but not on the place operation.

[JuKu]

> Any downside to going 2-3 times higher than default one ?

You’ll notice if it’s too much, the motor stalls or starts to make weird noises.

The pick and place operations are handled the same way. If you see a difference, please re-check the tube movement. (Read the second chapter at https://www.liteplacer.com/calibrate-needle-height/)