Corexy homing/endstops
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Hi,
I use IR beam break sensors for all my end stop needs.
However I don't worry about getting the sensor to trigger at either the actual min or max on an axis, just something close to it.
Then I adjust the actual position using G92.
I also have a BLTouch v3 Z probe but I don't use that for homing, only for setting Z=0 and height map creation.
Frederick
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@fcwilt said in Corexy homing/endstops:
Hi,
I use IR beam break sensors for all my end stop needs.
However I don't worry about getting the sensor to trigger at either the actual min or max on an axis, just something close to it.
Then I adjust the actual position using G92.
I also have a BLTouch v3 Z probe but I don't use that for homing, only for setting Z=0 and height map creation.
Frederick
No worries,
So it's just like some sort of printed plastic peg has to fit between the 2 black "boxes" on the sensor?
And you use one of these and a BLTouch in combination? Is your bed not flat, and if not wouldn't the BLTouch be enough? Is the optical sensor a backup/redundant/failsafe for your Z axis or something like that?
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@Corexy said in Corexy homing/endstops:
@fcwilt said in Corexy homing/endstops:
Hi,
I use IR beam break sensors for all my end stop needs.
However I don't worry about getting the sensor to trigger at either the actual min or max on an axis, just something close to it.
Then I adjust the actual position using G92.
I also have a BLTouch v3 Z probe but I don't use that for homing, only for setting Z=0 and height map creation.
Frederick
No worries,
So it's just like some sort of printed plastic peg has to fit between the 2 black "boxes" on the sensor?
And you use one of these and a BLTouch in combination? Is your bed not flat, and if not wouldn't the BLTouch be enough? Is the optical sensor a backup/redundant/failsafe for your Z axis or something like that?
I use something like this IR beam break sensor
Before I installed the BLTouch I was homing X,Y,Z with these beam break sensors.
Since they were installed and working fine I saw no reason to remove the Z axis unit and home with the BLTouch.
The BLTouch does the Z=0 setting and the height map creation.
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No worries,
They look pretty much like the ones I've linked to above, and I'll be buying some other stuff from Triangle Labs at the same time.
I'll be getting a water jet cut plate in 8-10mm precision cast ally plate, and like I said if it's flat enough I won't even bother with mesh leveling. Hopefully I'll get by with one of the optical sensors...nice and boring and reliable.
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@Corexy said in Corexy homing/endstops:
I'll be getting a water jet cut plate in 8-10mm precision cast ally plate, and like I said if it's flat enough I won't even bother with mesh leveling.
I purchased a machined plate with this description "Cast Aluminum Plates have a precision machined surface for superior flatness, flat within .015'', and +/- .005'' thickness tolerance".
But on top of that I have a borosilicate glass plate.
And on top of that I have a BuildTak FlexPlate System.
I have other glass plates with different build surfaces and they are easy to change out.
The result requires using mesh compensation if I want to use all of the area.
Frederick
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@fcwilt said in Corexy homing/endstops:
@Corexy said in Corexy homing/endstops:
I'll be getting a water jet cut plate in 8-10mm precision cast ally plate, and like I said if it's flat enough I won't even bother with mesh leveling.
I purchased a machined plate with this description "Cast Aluminum Plates have a precision machined surface for superior flatness, flat within .015'', and +/- .005'' thickness tolerance".
But on top of that I have a borosilicate glass plate.
And on top of that I have a BuildTak FlexPlate System.
I have other glass plates with different build surfaces and they are easy to change out.
The result requires using mesh compensation if I want to use all of the area.
Frederick
Yep, I doubt I'll get away without some compensation.
I'll either use a spring steel/pei coated magnetic plate, or Printbite like I have on my other machine stuck straight to the cast ally plate.
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@Corexy said in Corexy homing/endstops:
.......................Yep, I doubt I'll get away without some compensation....................
This is an old video I did about 3 years ago - 6mm float glass on top of 10mm aluminium tooling plate. NO compensation of any sort. https://www.youtube.com/watch?v=U733PMTou7M.
(It's a boring video - skip through it).
Edit. When I say NO compensation - that includes no auto bed levelling as well as no flatness compensation of any sort.
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@deckingman said in Corexy homing/endstops:
@Corexy said in Corexy homing/endstops:
.......................Yep, I doubt I'll get away without some compensation....................
This is an old video I did about 3 years ago - 6mm float glass on top of 10mm aluminium tooling plate. NO compensation of any sort. https://www.youtube.com/watch?v=U733PMTou7M.
(It's a boring video - skip through it).
Edit. When I say NO compensation - that includes no auto bed levelling as well as no flatness compensation of any sort.
Yes I know.
I use no compensation or leveling on my Duet/Zortrax as well, just a feeler gauge about a year ago. I'll see how it goes when I get my bed made for this new printer.
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@Corexy Personally, I think that some peoples problems might be of their own making, but it's just a hunch. You can distort tooling plate if the frame you fix it too is bent.
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@deckingman said in Corexy homing/endstops:
@Corexy Personally, I think that some peoples problems might be of their own making, but it's just a hunch. You can distort tooling plate if the frame you fix it too is bent.
Especially with 4 leveling screws...
