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It's all but confirmed that the printer was defective. I got a new printer and loaded up the sample G-code it comes with, but the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

After some shenanigans, I got a new belt on it. The belt didn't snap as I thought, instead the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. On a 15mm cylinder I found nearly a 0.2 variance.. Diagonally. This time, the bottom left to the top right (opposite of the last printer). A 30mm cylinder showed a definite 0.4mm variance on the same diagonal.

I tried readjusting the X-Axis, but nothing changed. I pulled out a cylinder that my old Ender 3V2 printed (25mm diameter), the variance was <0.1mm, a perfect circle (ignoring the z-seam).

This printer has not been worth the time spent on it, let alone the hassle. What a shame. The printer is fast and has beautiful quality prints otherwise. But it's worthless if they can't properly align the axes at the factory.

It's all but confirmed that the printer was defective. I got a new printer and loaded up the sample G-code it comes with, but the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

After some shenanigans, I got a new belt on it. The belt didn't snap as I thought, instead, the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. On a 15 mm cylinder I found nearly a 0.2 mm variance, diagonally. This time, the bottom left to the top right (opposite of the last printer). A 30 mm cylinder showed a definite 0.4 mm variance on the same diagonal.

I tried readjusting the X-axis, but nothing changed. I pulled out a cylinder that my old Ender 3v2 printed (25 mm diameter), the variance was <0.1 mm, a perfect circle (ignoring the Z-seam).

This printer has not been worth the time spent on it, let alone the hassle. What a shame. The printer is fast and has beautiful quality prints otherwise. But it's worthless if they can't properly align the axes at the factory.

It's all but confirmed that the printer was defective. I got a new printer and loaded up the sample G-code it comes with, but the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

After some shenanigans, I got a new belt on it. The belt didn't snap as I thought, instead the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. On a 15mm cylinder I found nearly a 0.2 variance.. Diagonally. This time, the bottom left to the top right (opposite of the last printer).

  A 30mm cylinder showed a definite 0.3mm variance on the same diagonal. Simple cube also showed a 0.28mm variance between diagonals (though this one may be exaggerated due to z-seam placement).

I tried readjusting the X-Axis (which lowered the error margin by 0.1mm on the previous printer), but no such luck.

This printer has not been worth the time spent on it, let alone the hassle. What a shame, the printer is fast and has beautiful quality prints otherwise. But it's worthless if they can't properly align the axes at the factory.

It's all but confirmed that the printer was defective. I got a new printer and loaded up the sample G-code it comes with, but the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

After some shenanigans, I got a new belt on it. The belt didn't snap as I thought, instead the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. On a 15mm cylinder I found nearly a 0.2 variance.. Diagonally. This time, the bottom left to the top right (opposite of the last printer). A 30mm cylinder showed a definite 0.4mm variance on the same diagonal.

I tried readjusting the X-Axis, but nothing changed. I pulled out a cylinder that my old Ender 3V2 printed (25mm diameter), the variance was <0.1mm, a perfect circle (ignoring the z-seam).

This printer has not been worth the time spent on it, let alone the hassle. What a shame. The printer is fast and has beautiful quality prints otherwise. But it's worthless if they can't properly align the axes at the factory.

It's all but confirmed that the printer was defective. I got a new one and the measurements of the right/left sides of the printer were perfectly the same, so the X and Y axes should be perfect.

I say should be since I wasn't able to test it because the printer failed the very first test print. I simply loaded up the sample G-code it comes with and the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

Checking online, seems I'm not the only one who had the Y-axis belt rip off. But probably the first one to have it snap on the first print. Another common issue is apparently the knobs for the bed simply falling off.

After some shenanigans, I got a new belt on it. The old belt didn't snap as I thought, the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. I read varying error margins within 0.15 mm, which can ultimately be explained by human error, Z-seams, and X/Y axes calibration.

I must admit I'm not sure this printer has been worth the time spent on it alone, let alone the hassle.

It's all but confirmed that the printer was defective. I got a new printer and loaded up the sample G-code it comes with, but the bed's belt snapped 10 minutes into the print (it was only finger-tight). This makes two Neptune 4 Pro printers in a row I've received with defects.

I can only imagine that their quality control is terrible or I have terrible luck. They're also not replying to my emails for the next week due to a week-long holiday. This is an entire month wasted on defective printers.

After some shenanigans, I got a new belt on it. The belt didn't snap as I thought, instead the metal that was crimped on it failed to hold the belt and it slipped out. This was when I noticed that the Z-axis movement was very noisy. To my surprise, I find that the lead screws were entirely unlubricated.

I printed new cylinders/cubes. The measurements are inconclusive, which probably means the machine is fine. On a 15mm cylinder I found nearly a 0.2 variance.. Diagonally. This time, the bottom left to the top right (opposite of the last printer).

A 30mm cylinder showed a definite 0.3mm variance on the same diagonal. Simple cube also showed a 0.28mm variance between diagonals (though this one may be exaggerated due to z-seam placement).

I tried readjusting the X-Axis (which lowered the error margin by 0.1mm on the previous printer), but no such luck.

This printer has not been worth the time spent on it, let alone the hassle. What a shame, the printer is fast and has beautiful quality prints otherwise. But it's worthless if they can't properly align the axes at the factory.