SoliForum - 3D Printing Community — Non-constant extrusion issues

Re: Non-constant extrusion issues

null@example.com (thatcactusgirl) — Fri, 24 Feb 2017 01:38:29 +0000

Thank you for the tips! It's printing beautifully now. Even more so because I have the new E3D

Re: Non-constant extrusion issues

null@example.com (heartless) — Thu, 23 Feb 2017 12:41:56 +0000

you are not the only one to have experienced this issue, it is actually very common when switching to the E3D hotend.

one of my first runs with one.

and yes, it is a voltage issue.

Re: Non-constant extrusion issues

null@example.com (wardjr) — Thu, 23 Feb 2017 04:28:37 +0000

Skip over any XYZ DaVinchi posts they used a different style driver.

Re: Non-constant extrusion issues

null@example.com (wardjr) — Thu, 23 Feb 2017 04:13:34 +0000

Simple Moiré, adjust the VREF. Do a search VREF and you should get plenty of hits. The shorter much more precise melt zone of the E3d is going to reveal a problem that was being covered up by the much larger melt zone of the stock PEEK style. Nothing to worry about just a little tuning and you'll wish you had switched to an E3d sooner.

Non-constant extrusion issues

null@example.com (thatcactusgirl) — Thu, 23 Feb 2017 04:00:24 +0000

So I recently installed a new E3D v6 hotend on my Solidoodle 2 Pro, and along with it came a problem that I haven't seen anyone else have. When the extruder motor turns, it turns in steps. This has been normal behavior for my printer since I've gotten it, even though these steps seem a little large. This never used to be a problem until I installed the E3D, and now it is making lines bumpy. Whenever the motor makes a step, it pushes out more plastic, creating a wide part of a line. Here are 5 lines surrounded by a skirt that I just printed:

This doesn't only happen with lines. Here's the first print that I did after installing the E3D (a hollow cube):

After that, I tried increasing the speed from 40 m/s to 60 m/s, and printed the same model. This was the result:

I then brought the speed back down from 60 m/s to 45 m/s, and tried a different model (a solid cube with 20% infill)

All in all, I'm stuck. Nobody seems to have a solution, or even has had this problem. Every time I search about it, the results are about clogged extruders or the sort. Any help or insight would be appreciated.
Here's some additional information:

I use Hatchbox 1.75mm ABS filament, and I've tried different colors.

I print at 240 C according to the E3D thermistor, and have a glass hairspray-coated heated bed at 100 C.

Here's the temperature curve during a print:

I use lawsy's jigsaw replacement mk5 with feitcounter's mk5 E3D body and bradjshannon's mk5 better locking arm.

Also, I'd like to add that I have not calibrated the flow rate. I cannot get an accurate measurement of thickness with the bumpy nature of the lines. I have, however, adjusted the flow rate to see if it fixes the problem. It did not.