Bad z starting position

[mcgragger]

Just built mine this week. I am trying out some different slicers because Slicer keeps crashing on large objects.

I have tried Kiss and Cura but both are creating prints that are starting at almost the highest Z position. Never had this problem with Repetier and Slicer. I downloaded all the Kiss settings from mhackney and tried adjusting zoffset but nothing is working.

[carter]

so, I've only been printing about 2 weeks now, but since nobody has replied yet I thought I'd say something.

I have only used slicer and have a solid gaming computer. My rig slices stuff pretty quick, but I have noticed that at about 80% the completion bar slows way down. this probably isn't your problem since you say it crashes but thought I'd mention it.

so far all my problems have been solved by running my .obj files from sketchup through netfabb and using the repair feature. maybe this will help you. just google netfabb basic and the download page is on the top. If not that specific software, I would at least try exporting your files from a couple different CADs if possible to see if those work better with repieter

[Tinyhead]

Just built mine this week. I am trying out some different slicers because Slicer keeps crashing on large objects.

I have tried Kiss and Cura but both are creating prints that are starting at almost the highest Z position. Never had this problem with Repetier and Slicer. I downloaded all the Kiss settings from mhackney and tried adjusting zoffset but nothing is working.

What do you mean by 'creating prints at almost the highest Z position'? Like it's printing in mid-air?

[mcgragger]

I have only used slicer and have a solid gaming computer. My rig slices stuff pretty quick, but I have noticed that at about 80% the completion bar slows way down. this probably isn't your problem since you say it crashes but thought I'd mention it.

I actually got slicer to stop crashing when I updated it. No more memory issues. The packaged version with Repeteir is now out of date. Thanks for the suggestion I will play around with more.

[mcgragger]

What do you mean by 'creating prints at almost the highest Z position'? Like it's printing in mid-air?

Correct. The gcode generated by Kisslicer/Cura/Skeinforge all look like they are placed correctly when I load it into Repeteir but all start printing in mid air. Slicer also looks correct but starts printing on the bed though.

[mcgragger]

This is my Kisslicer prefix code ....

T<EXT+0>
M104 S<TEMP>
M190 S<BEDTEMP>
M109 S<TEMP>

This is my postfix code ....

G1 X70 Y0 F5000
G28

What are others using?

[geolupulus]

Correct. The gcode generated by Kisslicer/Cura/Skeinforge all look like they are placed correctly when I load it into Repeteir but all start printing in mid air. Slicer also looks correct but starts printing on the bed though.

I am in the same boat, this happens to me I'd say 30% of the time. I reboot the printer, and Repetier and load the same EXACT G-code and it prints fine. Drives me mad. (Using Rostock Max V2, Windows XP & newest Repetier.)

[EyeBee]

I have the same issue with Cura (but not slic3r or kiss). Half the time the print starts about 10cm above the bed.

I have a Max V2 and using Repetier Host to initiate the print from a Mac running Mountain Lion.

[mcgragger]

Its finaly working with these prefix and post in kisslicer

Pre:

G28
T<EXT+0>
M104 S<TEMP>
M190 S<BEDTEMP>
M109 S<TEMP>
M117 KEEP HANDS AWAY

Post:
G1 X70 Y0 F5000
G28
M104 S0 ; turn off temperature
M140 S0 ; turn off bed temperature
M84 ; disable motors
M117 PRINT FINISHED

[Eaglezsoar]

It's good to see that you got it working.
Happy Printing!

[foshon]

G1 X70 Y0 F5000

Take that out, it's for cartesions and places the print to the front for grabbing it more readily. On a Rostock its just moving your effector to one side before going straight up with the G28.