First off, sorry about the crazy message, writing this on a phone. Auto-correction is killing me.
Running into what I believe is a levelling problem. After moving from a Wanhao 7.5 to an Anycubic Photon I am using the same technique to level the build-plate against the Display screen. I am not sure if it is is too low or high with the type of error I am seeing. The large circular layers are fine, but once the base of the cube start, it adheres to the FEP sheet. I do not see moment in the print-plate or changes after printing.
The steps I'm using to level the bed.
1) Loosen the build-plate bearing till it swivels around.
2) Home the Z axis.
3) Place a cut to size sheet of paper atop the display glass. I am using a standard white printer sheet - 20lb. basis weight thickness.
4) Keep lowering the Z axis by 0.01 increments until till I can pull but not push the paper sheet under the build-plate.
5) Gently push down on the build-plate edges and tighten the build-plate bearing to lock it level.
5) Exit and press the Z axis to zero, confirm with a click on yes.
Long and detailed extended version of why I think it's to low
I have an older Anycubic Photon purchased back in late February of this year, the blue acrylic series. It always worked but dimmer compared to my Wanhao DLP 7.5 printers. The exposure times much longer than what I was expecting. Looking at the community Google-Docs and previous experience using the Wanhao DLP units, exposures are taking 2 to 3 times longer the listed values for the Photon. The Demo-Cube never did print. I was able to modify the demo cube's gcode and print it on the Wanhao DLP 7.5 with the 60s-base and 8s-layer time. I was using the Anycubic Day-glow-green and NOVA3D 3D Black resin. So I knew something was up and the Cube was good.
Earlier this month I purchased a new Photon from Amazon. While waiting for my new unit I went ahead and did a firmware upgrade. To my surprise it is visibly brighter, you can see images displayed on the LCD screen when the door is closed. I never did have a chance to test it before the new unit arrived. Shockingly the new purchase arrived in under two days. From click to purchase in 27 hours.
The new Photon would start printing the Demo demo cube till mid-way up then fail. Repeatably it would fail at the exact same point. Examining all three failures the cube leaning slightly forwards. I ran my hand along the Z-axis and found it was horribly angled at the top. I was able easily able to push my thumb and forefinger behind the slide at the top. The bottom of the slide was like my older Photon and a few centimeters from the back. Using a sheet of paper and a drop line, I was able to measure about 19deg off at the top. I returned it Amazon, no questions asked.
I put my original Photon back and tried printing again. This time when printing the Demo Cube, I am getting a base but it pulls off at the start of the 3 cube corners leaving me with a great 2d image on the FEP of the cube. It's printing, but something is still off. Again using the Anycubic Photon Day-glow-green and NOVA3D 3D Black resin.
I have attached a few images of the failures I am seeing, these are in NOVA3D 3D Black resin. The green ones are faint and hard to see. Poor lighting in my area.
Any suggestions would be Great.
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