Hate to repost, but do all the endstop switches have to be at the same height? ( Only two are at the same height and one is off, one wont fit into the hole)
For the first run I only used the default 5 probing points - 4 near the periphery, one in the centre. In the next session I plan to get more ambitious. I haven't worked out how to change the number of probe points yet - is it simply a matter of adding lines to the config.g file, where it currently shows a list of 4 probe points?
; Auto calibration routine for delta printers ; Before running this, you should have set up your zprobe Z offset to suit your build, in the G31 command in config.g. M561 ; clear any bed transform, otherwise homing may be at the wrong height G31 X0 Y0 ; don't want any probe XY offset for this G28 ; home the printer ;*** Remove the following line if your Z probe does not need to be deployed M98 Pdeployprobe.g ; deploy the mechanical Z probe ; The first time the mechanical probe is used after deployment, it gives slightly different results. ; So do an extra dummy probe here. The value stored gets overwritten later. G30 P0 X0 Y0 Z-99999 ; Probe the bed and do auto calibration G30 P0 X-73.6 Y-42.5 Z-99999 ; X tower G30 P1 X0 Y-85 Z-99999 ; between X and Y towers G30 P2 X73.6 Y-42.5 Z-99999 ; Y tower G30 P3 X73.6 Y20 Z-99999 ; between Y and Z towers G30 P4 X0 Y67 Z-99999 ; Z tower G30 P5 X-73.6 Y20 Z-99999 ; between Z and X towers G30 P6 X-36.8 Y-21.25 Z-99999 ; half way to X tower G30 P7 X36.8 Y-21.25 Z-99999 ; half way to Y tower G30 P8 X0 Y42.5 Z-99999 ; half way to Z tower G30 P9 X0 Y0 Z-99999 S7 ; centre, and auto-calibrate 7 factors ;*** Remove the following line if your Z probe does not need to be retracted M98 Pretractprobe.g ; retractthe mechanical Z probe G91 G1 S1 X170 Y170 Z170 F15000 ; go part way up to speed up homing, endstops activated just in case G90 G28 ; Home the printer again
Hate to repost, but do all the endstop switches have to be at the same height? ( Only two are at the same hieght and one is off, one wont fit into the hole)
Hmm - the printer's definately got a slight tilt. I didn't need to measure it, as I can clearly see the difference in sensor height going from front to back in the Y plane.
Now I've got to do some checking to see if I can identify the cause... I guess it's going to be:
* towers vertical
* rod lengths equal
* rods parallel in all positions on the bed
It never rain but it pours...
While fiddling around trying to check the printer's geometry, I had to unhook the GT2 belt on one of the columns - and now the damn thing won't stay put when I try to replace it. The problem is that the 2 sides of the slot in the rod carrier have been wedged apart due to the belt tension, the slot is now wider, and now the belt teeth slip over each other. I've tried various dubious fixes (e.g. tape on the back of the belt to make it thicker) but nothing seems to resolve the problem.
I wish the belt fixing was a bit more positive, e.g. some form of screw clamp.
...and breathe, deeply...
G31 X0.0 Y0.0 Z0.5 P500 ; Set the zprobe height and threshold (put your own values here)I have assumed that the Z offset value should be positive as the Z-probe trigger point is 'below the bed' as far as the effector is concerned. Is this reasonable?
Could anybody tell me why my lcd display is dim and if its not plugged into pc it just lights up no writing?
I also included a drawing that shows how many T nuts slot into the base extrusions and where they fit. The top frame is easy, just 4 in each inner V slot.