Changing printer speed mid print

Bambu Lab A1 Series General Discussions
1

Hi all
Is it possible to change printer speeds in Bambu labs slicer so I can tell it to slow down mid print automatically in the Gcode?
For example, I want it to print at 100% for a duration, then slow to 50% toward the end of the print to increase the quality in a certain area?

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Screenshot 2024-06-11 at 19.37.55
Screenshot 2024-06-11 at 19.37.55416Ă—1092 44.2 KB

If you select the model in question, right-click and add a “Height range Modifier”, you can set many changes for as many different height blocks as you wish.

In the picture you can see I added some simple ranges, you can set the start and end height for each.

You can then choose the colour at that slice (change per level) or leave it as it is.

For your needs, you can change the per object per layer height range option including the speed. as you can see from the open tab in the bottom section.

3 Likes
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Welcome to the forum.

For future reference this thread is also related.

1 Like
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I know this is an old post, but I’m trying to do the same as OP and can’t figure out what I’m supposed to do to add more than one height range modifier. I want most of the print to be at X speed and then the rest to be at 1/2X.

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The reason you can’t find it easily is it isn’t the best UX.

I will assume you nothing, it makes it easier, not an insult.

  1. Select your model
  2. Right-click it
  3. Select Height range Modifier
  4. Locate the objects panel and your model, it may have done this for you the first time
  5. Select “Layers” under your model.
  6. At the bottom, you will see the layers configuration panel.
  7. Only one entry will be listed, press the plus button and another will appear
  8. Press it again and one more will appear
  9. Press the minus button on the second one and Will will disappear, you are back to two now
  10. Enter a from and to in the first row boxes (in mm NOT layers)
  11. Enter a from and to in the second row boxes
  12. They can overlap, which can be handy depending on what you are modifying
  13. Look back up to your model both modifier ranges are in the layers tree group
  14. Select the first one and press any number on your keyboard and your filament will swap to it
  15. That doesn’t always work, so click the swatch to the right and press space to show the filament pool, choose one
  16. Select the second entry in the layer group under you model and change the wall count to a different number.

You now have two different height range modifiers doing two different things, one simply assigning a colour for the range, the other one changes strength values.

You have created them, added and remove them and played with their locations.

You also realise that the first swatch (one your second entry has no colour, you can research this for the first entry if you wish).

You are now a height range superstar.

Enjoy.

2 Likes
6

Thank you very much! I figured out most of this but for some reason just didn’t see the plus button until you pointed it out.

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Bad UX.

I do not like the fact you can change the from and to values in the object list and at the bottom when you select layers.

I would like JUST the bottom options when you press the Layer option and move the swatch down there to handle the only reason it is also in the object list.