issues with platform origin offset.

[egonthemighty]

running a CTC replicator knockoff with a build platform of 220 x 140 x 150.

My origin offset is set to the middle of the platform by default (110, 70, 0). I'm having problem describing the issue, but basically, it seems like when I start a print, the head moves to the back right of the plate (from my perspective) which I understand to be the Max position (220, 140) as far as S3D is concerned. Instead of moving to 0,0 (front left) to warm up, it moves to the center of the plate then will print only in the back right corner of the plate (and attempt to go off the plate to the right).

I feel like when it goes to the Max position, the x and y axes are somehow getting reset to 0 at that point so that when it pulls the offset, it looks like the center of the table is the origin instead of the front left corner. I'm not very good with G code yet, but looking at the first part of my script (default) I'm not seeing the reset. am I going a little crazy? For the record, when I print through Slic3r or Makerware, the machine behaves correctly. Sorry if this is confusing, English not my first language.

; **** Replicator 1 dual start.gcode ****
M73 P0 ; Enable build progress
G162 X Y F3000 ; Home XY maximum
G161 Z F1200 ; Home Z minimum
G92 Z-5 ; Set Z to -5
G1 Z0 ; Move Z to 0
G161 Z F100 ; Home Z slowly
M132 X Y Z A B ; Recall home offsets
M135 T0 ; Load right extruder offsets
G1 X-110 Y-70 Z30 F9000 ; Move to wait position off table <-- at this point the extruder moves to center of table instead of where i'd think the origin would be.

[CompoundCarl]

Are you using the stock "CTC 3D Printer" profile from the S3D configuration assistant? Did you make any changes to that profile?

If you are using the stock profile and this is still happening, it probably means the firmware offsets on your printer are incorrect

[chha1de]

I am having exactly the same problem.
The printer is a CTC creator dual. It's a direct clone of the FlashForge Creator Dual.
I tried the 'CTC 3D printer' and the 'FlashForge Creator Dual' profiles and the problem is exactly the same:
1. For heating up the extruders part in the center of the plattform.
2. It starts the purge lines for the two extruders form this point to the left. So they are rigth in the middle of the plattform.
3. The build process starts in the upper half of the plattform.
3. When it hits the upper edge it just continues printing using a relativ way of positioning the nozzel. Of course the material that was printed befor is still there. It just prints over it.

Slicing with MakerWare did not show this behaviour and it still works fin after I started using Simplify3D.
The firmware in my case is sailfish 7.7 .
Changing the origin in S3D did not work. Somehow the software resets the setting before slicing.

Thank you and regards,
chha1de

[CompoundCarl]

I've had this happen before and the reason was that the offsets in the sailfish firmware were wrong. I didn't correctly set them after installing the firmware.

These are the offsets stored in the FIRMWARE, not in the software

[chha1de]

Thank you for your help!

This solved the problem.
Strange enough: the Y offset was correct at 75 mm. Just the X offset was 152 mm and should have been 115 mm.
I guess they needed to be changed to take effect.

chha1de