Do not lubricate the lead screws. The lubricant will turn into a mess of black soot and eventually cause more friction. Do you have the nylon blocks with the tension adjustment? http://openbuildspartstore.com/anti-backlash-nut-block-for-8mm-metric-acme-lead-screw/
Re: Error Max Temperature
You are over shooting your set temperature and hitting 243C. You should turn down temperature and slow print speed. I would not recommend setting a temperature over 235C. Try running a PID autotune for more stable temperatures.
Re: New BL touch just blinking.
The Bl touch will blink its red LED when it did not successfully complete the self test. The BL touch will run its self test when the printer is first powered up. The self test will push the plunger up and down 2 or 3 times.
The self test could be failing...
Download and install the Arduino IDE.
During the install, it will ask you which device drivers to install. Install all of them. Once these drivers are installed your computer should have no problem detecting and communicating with the Atmega 2560 of the...
If you test the screw terminals of the RJ-45 breakout board inside the electronics box, do you read 12V when it is set to 255?
If I had to guess, the Rj-45 breakout board mounted to the extruder needs to be replaced...
Look straight down the filament path and make sure the extruder gear is aligned with the PTFE tube below it. If it is not aligned you can adjust the position of both the stepper motor and the drive gear. You will obviously have to remove the filament before you can do this.
You will probably get better results by slowing down and decreasing layer height. The material is not adhering the layer beneath it. As the strand of plastic cools/shrinks it pulls the material inward.
We offer the XT to meet demand for a taller Z-axis and provide the necessary build volume people want. The original gMax was "only" 10" in the Z axis. The extra size adds complexity for us in a variety of unexpected ways both for technical support and shipping.