It does help, thanks. I’ve not noticed any Z issues that I thought were from microstepping. I’d just always heard the “magic Z height” for printers to utilize full step increments as being desirable. I’ll just say eff it and keep letting KISSLICER do a brilliant job of using dynamic layer height.
Thanks again everyone. Trying to work out a replacement linear rail solution for the X axis to remove some artifacts and then I think this printer will be quite brilliant.
@droftarts not sure exactly what the screw is for the Z. Was just told it was a double threaded rod with 8TPI. I’m not versed on them or how to identify what is what.
My interpretation was always that it was simply easier/more precise for the stepper to hold place on a full step. But that’s entirely based on my limited knowledge of steppers and the implementation of microstepping.
Quick question that I didn’t find the answer to.
A full step on my Z is 0.0158mm. So is it best to leave that number as is or better to just round up to 0.016? I didn’t know how the firmware handles decimal places. Same thing for the slicer....utilize multiples of 0.0158 or just use multiples of 0.016?
@Phaedrux thanks for everybody’s help. I went ahead and knocked out a quick test print and all looks good. It looks like the duet is removing the artifacts I was experiencing with the stock Rambo board. More testing to confirm, I will play with it more tonight after I get back home from work.
I forgot that I plan on running the quick 9 point mesh at the start of every print so no need to reload the height map. But good to know if I decide to remove that from my starting process. Thanks again everybody.
After bed mesh is complete do I need to reload the height map after a reboot of the board?
Can someone give a brief explanation of the deviation and error results?
More specifically “error m557: bad grid definition: Y range too small”
@Phaedrux it said the Y value too small
How in the crap have I overlooked that for 24 hours?
So I have the manual bed adjustment assistant working and used it to tram the bed.
After that I setup the m557 for the bed mesh compensation and tried running it. However, I keep getting a “Error G29: no valid grid defined for bed probing” .
Here’s my bed.g that’s setup for the leveling assistant.
; bed.g
; called to perform manual bed level assistant via G32
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Mon Feb 24 2020 01:49:32 GMT-0600 (Central Standard Time)
M561 ; clear any bed transform
G28 ; home all axis
G30 P0 X25 Y16 Z-99999
G30 P1 X215 Y16 Z-99999
G30 P2 X25 Y248 Z-99999
G30 P3 X215 Y248 Z-99999 S4
G1 X100 Y126.5 F9000 ; go to center of bed
And here’s a chunk from my config.g file....what am I missing?
;Z-Probe
M558 P9 H5 F300 T9000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X21.0 Y0 Z1.048 ; set Z probe trigger value, offset and trigger height
M557 X25:215 Y16:Y248 P3 ; define mesh grid with P defining number of points to probe in each axis
; Manual Bed Leveling Assistant
M671 X21:219.5:21:219.5 Y8.5:8.5:257.5:257.5 P0.7 ; bed adjustment screws are front left (x21,y8.5), front right (x219.5,y8.5), rear left (x21,257.5), rear right (x219.5,y257.5), thread pitch is 0.7
Excellent. Thanks. I do indeed already have both of those docs opened in tabs. Currently at work, just trying to determine my attack plan for when I get home tonight.
Some of the docs just didn’t explain enough detail as to what everything did (or at least I didn’t see it if it did) but you’re making things more clear.
Ok, that makes more sense. So, if I place the nozzle above a screw to find it’s XY coordinates, do I use the numbers shown on the GUI or do I need to compensate for the 21mm X offset of the BLtouch? I have the BLtouch offset defined in the config.g file.
So what’s the m671 stuff in the config.g for?
I’ll just be looking to do the manual adjustment on occasion, of course. It seems to hold its position quite well. However, before each print I plan on a somewhat quick 9 point mesh compensation as that’s what it used in stock form and I had zero complaints. The print area is only 202 x 233
Gotten a little further in the set up process. The next thing I’m looking to do is set up manual bed level assistance. After that I plan on setting up the bed mesh compensation but was curious, do both of those call on the bed.g file?
@Phaedrux Dang it. I didn’t think about resuming a print. How well would that work though if zero was set with the bltouch and not the endstop?
Thanks again. Will probably do as you said and see about dropping the current during the homing procedure on the Z axis.
The more I think about it I’m betting they actually didn’t use the Z endstop in stock configuration. Originally the M3 did not come with a BLtouch. I’m betting that endstop was never removed from the design. I could be wrong. But I’ll probably just remove it and make my life easier.
