Yes I calibrated them.using a calibration cube.

M92 X94.6 Y92.02 Z397 E91.85 ;sets steps per mm for x3g driver
M206 X152 Y75 Z0 ;sets home offset (opposite values of bed size)

OK,

Something odd has occurred. I had been trying to print with the computer plugged into the USB and of course ever time the Z axis stepper would loose power and drop the bed while still continuing to print in the air. I decided to us an SD card instead to print the Benchy Boat. Well it printed beautifully, much better then the Makerbot desktop software. But why does it work from an SD card and not if the PC is plugged into the USB and running the print?

BTW with Makerbot Desktop and printer software I get stair stepping the bow of the ship, but with your slicer bow is smooth. I tried to insert the photos here but it will not work. I will instead email them to you.

Yes it does. Not sure if this matters but I have upgraded the original control board in my CTC to a GEETEK Makerbot clone board, because my original burned out. I have had no issue with the Makerbot desktop and Makerbot Printer software. I'm also running Sailfish 7.5 Replicator Dual.

Yes I thought of the print leveling last night and turned it off. It still did the same thing with the bed thogh.

Actually it is releasing the stepper that holds the bed so the bed falls all the way down to the floor of the printer.

Ok,

I'll get you the print log. BTW the Z Axis stepper is actually releasing and letting the bed go down. I tryed it again tonite after reseting everything.

This seems like a bug in the software. Please someone reply?

Hi,

I just downloaded and installed MatterControl (1.7.5) for my CTC Makerbot ReplicatorDual(Sailfish7.5). When I print the test cube it starts fine, gives me a great first layer, but when it starts the next layer the z axis drops almost a full 5mm. When I print the same cube with Makerbot, all is fine. When I print the ring, I have a simular issue, only now it drops the z half way through the first layer. Help!