Printing right off the bat, no homestop

[richardphat 0]

So, I just don't know how you call this process, which is annoying. Pretty sure, this isn't the first time asking though.

Anyways, our Ultimaker, the Z endstop is severely damaged and by the slight contact of the mechanical switch will just move the z enstop by couple of mm. I would like to start right off the bat without homing the bed because it is no longer relevant.

I can use filler gage for the inconvenient or old fashion paper, it is not a problem.

I do know UltiGcode allows you to do this, however, last time I tried, it was just messy it was way overextruding.

So basically, I just need to skip the Z homing.

Here's a short beginning of a G code.

Do I just need to remove the line 15

 

G28 Z0     ;move Z to min endstops

From

 

M109 T0 S220.000000
T0
;Sliced at: Tue 02-09-2014 18:49:42
;Basic settings: Layer height: 0.1 Walls: 0.8 Fill: 0
;Print time: #P_TIME#
;Filament used: #F_AMNT#m #F_WGHT#g
;Filament cost: #F_COST#
;M190 S70 ;Uncomment to add your own bed temperature line
;M109 S220 ;Uncomment to add your own temperature line
G21        ;metric values
G90        ;absolute positioning
M82        ;set extruder to absolute mode
M107       ;start with the fan off
G28 X0 Y0  ;move X/Y to min endstops
G28 Z0     ;move Z to min endstops
G1 Z15.0 F9000 ;move the platform down 15mm
G92 E0                  ;zero the extruded length
G1 F200 E3              ;extrude 3mm of feed stock
G92 E0                  ;zero the extruded length again
G1 F9000
;Put printing message on LCD screen
M117 Printing...
;Layer count: 1598
;LAYER:0
M107
G0 F9000 X74.61 Y61.78 Z0.30
;TYPE:SKIRT
G1 F1200 X76.53 Y60.39 E0.04469
G1 X111.90 Y48.90 E0.74411
G1 X113.82 Y50.29 E0.78879
G1 X135.68 Y80.38 E1.48832
G1 X134.94 Y82.64 E1.53301
G1 X113.09 Y112.71 E2.23226
G1 X110.72 Y112.72 E2.27692
G1 X75.35 Y101.23 E2.97646
G1 X74.61 Y98.97 E3.02116
G1 X74.61 Y61.78 E3.72068
G1 F2400 E-0.77932
G0 F9000 X78.41 Y63.77
;TYPE:WALL-INNER

 

[kolia 31]

I do know UltiGcode allows you to do this, however, last time I tried, it was just messy it was way overextruding.

So basically, I just need to skip the Z homing.

 

No, basically, you just need to fix your Z enstop ;-p

 

[Daid 306]

No, basically, you just need to fix your Z enstop ;-p

 

This. Software workaround for hardware problems always ends in tears.

 

[kolia 31]

Richard, my Z endstop has been a pain to set correctly at the beginning, always sliding when screwing for some reason (and wood case a little too soft) but it works OK. However I've seen a few times some replacement for this system:

http://www.thingiverse.com/search/page:1?q=ultimaker+z+endstop&sa=

I don't know how severly damaged it is in your case, but maybe that could be a solution to fix it?

 

[richardphat 0]

Replacing the Z endstop will be impossible, at least not in 9 months. The plywood is also damaged, someone used a 6-32 screw which ends up breaking that spot. And because someone used a 6-32 screw to screw the endstop, well you know what happen....It just break in parts.

 

[Daid 306]

9 months? That's a long wait for a single micro-switch.

Anyhow, you could use any other homing switch, the right front homing switch isn't that important for example, so you could use that one in place of the Z homing switch. You could attach it with some tape while you print a nicer holder for it.