Simplify3D User Forum

PV_Eng wrote:Hello,

I need your help again ! The printer works fine with the current parameters but there is a little problem with the last perimeter extruded. As you can see on the following picture, the last perimeter quality is bad compare to the first (the outside perimeter is the first printed and the inside one the last printed). Do you know where this issue comes from?

Thanks for your answers!

In general that looks like a problem where the extruder is too close to the plate, why it's only happening on the last inner fill seems very odd to me. Did you change any of the heights? I really don't know why this would cause only the inner right to be flat though. Is it more like only the inner ring on the first layer is like that? And the second layer is correct?

In fact, it's happening on the last fill, inner or outter.
I changed bedplate Z offset to get a correct gap with the extruder because there was more than 1mm when I used your fff profile. The gap between the plate and the extruder is about 0,15 mm (printer user's guide preconizes 0,1 mm).

Only the fist layer is like that, all the other layers are correct.

I do think you might just be a touch too close to the plate. You might want to try about a 1/4 turn on the plate on each knob, or as the manual likes to say, "two steps". You should also note, I start printing at .4mm and print each layer at .1250 mm. You could also just go to advanced and start the "start print hight" up to something more like .8 in your case. In the printer if you use the built in table height adjuster, they say to use a sheet of printer paper (which is just slightly over 1mm, as you mentioned, near 1.2) but they also mention that it should only have a very slight resistance on pull. I grabbed a set of gap tools and mesured, and I'm currently sitting at 1.565mm on my offset. Hope that helps.

I think I finally found the problem : there was five layers for the outline shells, but the workpiece outline width was slightly greater than the width of five fill. So I think that the software increase the extruder flowrate to extrude a larger last fill.

I tried with only one layer for the outline shells, and there is no burr issue.

PV_Eng wrote:I think I finally found the problem : there was five layers for the outline shells, but the workpiece outline width was slightly greater than the width of five fill. So I think that the software increase the extruder flowrate to extrude a larger last fill.

I tried with only one layer for the outline shells, and there is no burr issue.

I'm glad that fixed your problem. It is impossible for Simplify to increase the extruder flowrate on the cubepro, but it is perfectly reasonable that your issue was related to wall thickness.
One thing i hope is eventually added is the ability for simplify to control the extruder flowrate, but for now, it in the scripts--and its a constant. (not proportional to movement speed)

Hello all,
we controls now our Cubepro with Arduino and Ramps1.4.
It is somatch easier to use filements and find the right settings.

tom wrote:Hello all,
we controls now our Cubepro with Arduino and Ramps1.4.
It is somatch easier to use filements and find the right settings.

I'm sure there are many users here who would love more details on your conversion.
Can you provide any photos or instructions on how you did it and what you had to buy?

hello,
ok I will try to explain it.
partlist:
Arduino Mega 2560
Ramps1.4
5x DRV 8825
3 Relais automotive
24V Poversupply
12V Powersupply
Display LCD 2004 with SD Card reader or LCD 12864 with SD Card reader
Fan 60mm 12V

so, I think this are the parts.

What we do is, we left all the Cubepro electronics in the print, we cut no cable, we extend the cable and contacted to Ramps1.4 board.
This is not so difficult, you have to find out which connector is which steppermotor and so one.
You need div. cable and some 2mm and 2,54mm connectors.
My colleague helps me out by the Marlin firmware and find the right parametres for the steppermotor.

More Info later I make some pictures.

Sorry for my english (:

Hi,
i have the original datasheet of the steppers. Is an M42STH for Z-Axis and 17HS19 for the others.
So i have modified my mechanics, because is a little space in this very bad construction..
First i have set an second spindle on the Z-axis and drive with an belt. Then i connected the two Motors of the x-Axis.. so i have buy the same steppers with long axis (17HS-19-1684) of both sides and connected each other.

nighteagle

tom wrote:hello,
ok I will try to explain it.
partlist:
Arduino Mega 2560
Ramps1.4
5x DRV 8825
3 Relais automotive
24V Poversupply
12V Powersupply
Display LCD 2004 with SD Card reader or LCD 12864 with SD Card reader
Fan 60mm 12V

so, I think this are the parts.

What we do is, we left all the Cubepro electronics in the print, we cut no cable, we extend the cable and contacted to Ramps1.4 board.
This is not so difficult, you have to find out which connector is which steppermotor and so one.
You need div. cable and some 2mm and 2,54mm connectors.
My colleague helps me out by the Marlin firmware and find the right parametres for the steppermotor.

More Info later I make some pictures.

Sorry for my english (:

I would LOVE to know how to modify the CubePro to work with standard gcode. Is there anyway you could put a guide together on how to do so?