Crazy move at the start of a print.

I have this crazy move in the Z axis at the start of a print. looks like its in the G-code, G1 Z0.297 F3600.000 , but not sure why it's being put in.
But Z0.297 at F3600 is crazy. Slicer has this for start G-code, G1 Z5 F5000 ; lift nozzle. Any ideas? I can edit it out but I hate to have to do that all the time.

Thanks

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; generated by Slic3r 1.2.9 on 2016-06-03 at 20:39:50

; external perimeters extrusion width = 0.60mm
; perimeters extrusion width = 0.72mm
; infill extrusion width = 0.72mm
; solid infill extrusion width = 0.72mm
; top infill extrusion width = 0.72mm
; support material extrusion width = 0.60mm

M107 ; fan off
M190 S60 ; set bed temperature
M104 S185 ; set temperature
G1 Z5 F5000 ; lift nozzle

M109 S185 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0
G1 Z0.297 F3600.000 ; THIS?????????
G1 E-2.00000 F2400.00000
G92 E0
G1 X74.770 Y71.971 F3600.000
G1 E2.00000 F2400.00000
G1 X77.173 Y70.210 E2.14883 F1800.000
G1 X79.957 Y69.149 E2.29765
G1 X82.500 Y68.855 E2.42554
G1 X107.500 Y68.855 E3.67436
G1 X110.453 Y69.253 E3.82319
G1 X113.194 Y70.419 E3.97202 F1800.000
G1 X115.529 Y72.270 E4.12084
G1 X117.290 Y74.673 E4.26967
G1 X118.351 Y77.457 E4.41849
G1 X118.645 Y80.000 E4.54638

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Edited 1 time(s). Last edit at 06/04/2016 02:02AM by Grinsaw.

You are using absolute coords, so the nozzle goes up to 5mm and then at the beginning of the print it goes down to 0.3 ( 1st layer height? )
Looks normal to me.

Quote
o_lampe
You are using absolute coords, so the nozzle goes up to 5mm and then at the beginning of the print it goes down to 0.3 ( 1st layer height? )
Looks normal to me.

Thanks o lampe,

What I was trying to point out was the problem with this line of code, Z0.297 at F3600. To expect any kind of accuracy when you move this distance at this speed is crazy. Maybe it works on other setups but it's disastrous on mine. Experience has pointed out to me that every time this code is run I end up with a different result. This affects the rest of the print job, inasmuch as the initial height above the print bed is randomized.

My question is how is this being put in to the code when slicer runs? Could it be the code in slicers print settings/start G code, or is it coming from somewhere else? Whatever the case I need to remove it or it ruins my print, I can do this manually but I would prefer not to have to do that. Is there some way to prevent slicer from putting this in?

It probably is in your Start Up GCode. For Slic3r, that is on the Printer Tab.

Quote
Roxy
It probably is in your Start Up GCode. For Slic3r, that is on the Printer Tab.

Thanks Roxy

Sad to say it's not, this is the only thing there. G1 Z5 F5000

I am having a similar issue.

If it is in your GCode file... That sounds like a Slic3r issue. You can start tweaking Slicer settings to see if you can get rid of it.