Hi all I am trying to build a camera slider to timelapse my 3D printing. Got it all set up to take a picture, when the print head parks after every layer. What I want to do now, is to input the amount of layers in the 3D print say 320 using the keypad, then use that to alter the distance traveled…

[image] gpw1057: I have a keyboard and LCD setup and working Then what is the problem? Just continue step by step.

Welcome to the forum I am not sure what you need help with but if it is entering a number using the keypad then this might help [image] Keypad data entry. A beginners guide Tutorials A common problem raised in the forum is how to use a keypad to enter a numb…

[image] gpw1057: Got it all set up to take a picture, when the print head parks after every layer. so you have a way to detect when the head is parked, which is what triggers taking a picture ? [image] gpw1057: What I want to do now, is to input the amount of layers in the 3D print say 3…

[image] gpw1057: Any help int OneStep = TotalSteps / 320;

Thanks all for your help, I am just getting into this type of programming am so old, I used to quite happily program BBC basic, could do anything, just a matter of getting used to it, I am getting there, just needed some pointers, thanks

[image] xfpd: int OneStep = TotalSteps / 320; If you calculate it once then you might fall short due to int truncation. Say you need 800 steps, 800/320 =2,5 but will be truncated to 2 and int the end you’ll have done 320 x 2 =640 steps instead of 800. That’s why keeping the full linear int…

You can just calculate the distance per layer by dividing your total slider travel by the number of layers.

Please explain how the solution should involve LEDs and multiplexing.

[image] chanchaldada: by dividing your total slider travel by the number of layers Mathematically this is correct but see post 7

Using Numeric Input & Manipulating it

Other Hardware LEDs and Multiplexing

UKHeliBob January 20, 2026, 3:58pm 3

Welcome to the forum

I am not sure what you need help with but if it is entering a number using the keypad then this might help

If you need help with something else then please give more details

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Using Numeric Input & Manipulating it

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