Ender 5 + Hemera + BL Touch
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@mitch said in Ender 5 + Hemera + BL Touch:
Pressing the button causes the printer to violently slam the head into the far left (max X) position before I have to hit an emergency stop.
is your movement correct? i suspect you need to invert the x direction for the x stepper.
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My movement works fine. I can home all three axis with no issue.
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did you change the microstepping and forget to change the steps/mm?
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Can you elaborate. Chances are I didn't "forget" as much as I am asking for guidance.
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when i said you should use x16 microstepping, did you do any changes?
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No, could you indicated what those changes are for the ender 5 steppers? I see where the changes should be made but not sure what the setting should be.
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if you go from x32 to x16 microstepping you need to half the steps per mm
so change the 160 to 80
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@Phaedrux how can I verify this? I was under the impression that the system would reference my configuration to compensate. Do I need to go manually change a bunch of files?
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I wasn't sure which button you pressed. There are 2 different bed leveling/compensation features.
The first is mesh compensation which uses G29 which probes a grid on the bed and makes a heightmap to adjust the Z position.
The second is G32, which does nothing in and of itself, since it actually just runs a macro called bed.g. In that macro you can specify whatever you want to happen. I suspected that the button you pushed triggered that macro, and that in bed.g there were some movement commands that were unexpected.
Open bed.g in the /sys folder to check what's in it, but I don't think that's the button you pressed.
Were you able to get the steps per mm and microstepping sorted?
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For X and Y the built in reprap calculator seems to arrive at the same value of 80 for X and Y but I think i have something for the Z.
I have the Ender Pro which is supposed to have a new leadscrew and I recall from Marlin it was at 800 steps/mm but not sure if the Marlin config was using a setting of 16 for microstepping.
What Preset and Pitch would be used for the Ender Pro leadscrew? Should the solution be 400 or 800 steps/mm?
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@mitch
the ender 5 pro z is 800 -
Great,
Thank you.
So here is where I am now.
I updated my DWC to the latest and now the autobed compensation seems to be working better with some weird flaws. The newest SW does not prompt to reboot after update. But it seems to me that a power cycle is needed for the changes to take effect. Is this correct?
With my Hemera setup I have found the max bed size to be:
x = 220mm
y = 207mmI have restricted the mesh parameters to X=180 and Y=200 to keep the probe on the bed. But it doesn't seem to care what is defined because it still goes past 180 in the x direction when probing.
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Are you sure the probe offset is correct?
X- goes to the left, X+ goes to the right, Y- goes to the front, Y+ goes to the back. 0,0 is the front left corner.
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@mitch said in Ender 5 + Hemera + BL Touch:
have restricted the mesh parameters to X=180 and Y=200
no you restrict the movement in the
Printer Geometry
section with max x and y -
I have calculated the BLtouch offset to be:
Probe X Offset = -43mm (43 mm to the left of the head)
Probe Y Offset = 3mm (3 mm behind the head)The total usable Bed (Print Geometry):
X (0 - 220mm)
Y (0 - 207mm) Due to the hemera contacting the front supportNote: Even though you can print in the X direction up to 220 mm. You can only use the probe as far as 180mm or you will be off the bed with the probe.
So it was my understanding that if I restricted the mesh parameter to 180mm it would do just that. Not exceed 180mm.
I just ran the "Mesh Compensation G29" under the compensation and calibration it it worked perfectly going to all extremes of the bed with the probe and not exceeding what was defined in the Mesh Parameters. It just seems that the "True Bed Leveling G32" violates the limits and attempts to probe too far in the X direction to the extent that the probe would be off the bed.
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@mitch said in Ender 5 + Hemera + BL Touch:
"True Bed Leveling G32" violates the limits and attempts to probe too far in the X direction to the extent that the probe would be off the bed.
That would be executing bed.g. You still haven't shown us what's in that file, so we don't actually know what it's trying to do. But generally you won't actually need to use that at all unless you're trying to do something specific and custom like independent Z motor bed tilt correction. G29 is usually enough.
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; bed.g
; called to perform automatic bed compensation via G32
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; generated by RepRapFirmware Configuration Tool v2.1.8 on Sun Feb 02 2020 11:21:35 GMT-0600 (Central Standard Time)
M561 ; clear any bed transform
G29 ; probe the bed and enable compensation -
I am finding very weird results with this Duet DWC. It seems that even if I make a change I need to hit the emergency stop for the board to reboot and then actually use the changes. I set the mesh limit and it ignores them now (even though it was using them before). Struggling to find consistent behavior so I can trust this thing. I also noticed even though I uploaded a new reprap config the config.g was still unchanged so I had to again hit the emergency stop to force a reboot. I fail to believe this is how this thing is intended to work.
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@mitch said in Ender 5 + Hemera + BL Touch:
I set the mesh limit and it ignores them now (even though it was using them before).
your bed just calls mesh grid compensation.
the configurator does not generate a proper bed.g for that anymore since it is depricated.
so the values you have put in in the dwc will be ignored. -
Ok, as a new user how do I know what is depreciated and what isn't? Not being sarcastic, seriously, how do I know what to trust will use settings and what will attempt to damage my printer?
Do I need to go in and manually update a bed.g? If it is depreciated what is used instead? I just want to make sure everything is functioning safely so I can be assured when I attempt to print it won't try to go off and slam into a limit or rip my BLtouch off the mount.
I set the limit down to 145 and it seemed to have an impact. Not that it used 145 as a limit but it didn't try to go off the bed with the sensor so something changed. The screen capture is from a completed mesh bed level. The final position was at 183? If I subtract 43 from 183 that gives me 140. -43mm was my x offset. Do I have my signs wrong on my BLTouch offset positions?
I have calculated the BLtouch offset to be:
Probe X Offset = -43mm (43 mm to the left of the head)
Probe Y Offset = 3mm (3 mm behind the head)
