Current issue list

[Lasivian]

#1 Printed lines in solid layers are not actually solid. Guessing this is E-step related. The gcode seems fine.
#2 Extruder motor "ticks" after printing. Triffid says this is the driver overheating Not sure what I'm going to do about that.
#3 Prints are undersized. Guessing I need to change the X/Y/Z steps but I've never done that on a Delta so I'm not sure how that works.

Any info about any of these would be awesome.

Thanks

[enggmaug]

#1 try extruding more material.
#2 fan blow on the Rambo
#3 you can try to adjust the rod size in configuration.h file of the firmware.

[geneb]

Do NOT change the steps per mm for the x, y, and z axes. Those are calculated based on the gear tooth count and diameter.

g.

[Lasivian]

Do NOT change the steps per mm for the x, y, and z axes. Those are calculated based on the gear tooth count and diameter.

g.

Ok, so how am I supposed to get properly sized prints from the machine?

Thanks

[Eaglezsoar]

Do NOT change the steps per mm for the x, y, and z axes. Those are calculated based on the gear tooth count and diameter.

g.

Ok, so how am I supposed to get properly sized prints from the machine?

Thanks

You can try tweaking the #define DELTA_DIAGONAL_ROD
This changes the length of the arms and once you get the correct value you should get the properly sized prints.

[neurascenic]

Do NOT change the steps per mm for the x, y, and z axes. Those are calculated based on the gear tooth count and diameter.

g.

Ok, so how am I supposed to get properly sized prints from the machine?

Thanks

You can try tweaking the #define DELTA_DIAGONAL_ROD
This changes the length of the arms and once you get the correct value you should get the properly sized prints.

Would a ratio propotion calculation do the trick to figure it out? X DELTA_DIAGONAL_ROD/ Desired size of object = Current DELTA_DIAGONAL_ROD / Actual size of object.

[Eaglezsoar]

[/quote]Would a ratio propotion calculation do the trick to figure it out? X DELTA_DIAGONAL_ROD/ Desired size of object = Current DELTA_DIAGONAL_ROD / Actual size of object.[/quote]
I don't know the answer to that one. I do know that there have been many posts where the user had to change the #define DELTA_DIAGONAL_ROD to get the actual size to match what it is supposed to be. You can search the forum for Delta Diagonal rod to get more information. site:forum.seemecnc.com DELTA_DIAGONAL_ROD entered at your browser will
find most of them.

[Lasivian]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

[Jimustanguitar]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

The arms are exactly the same length, so that won't be the case. Brian actually has a very nice jig that keeps the assembled dimensions very precise. The delta radius will vary by builder though, and this is an adjustment that you'll have to do specific to every machine.

[neurascenic]

Hmmm... A ratio proportion, might be a quick way to adjust such things. At least a way to get closer to the desired result. of course, won't do a bit of good if that isn't the issue.

[Eaglezsoar]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

The arms are exactly the same length, so that won't be the case. Brian actually has a very nice jig that keeps the assembled dimensions very precise. The delta radius will vary by builder though, and this is an adjustment that you'll have to do specific to every machine.

Jim, his problem is that the parts do not come out to the correct size the delta radius should not effect this, should it? From all the topics I have read
if the parts are not printing the correct size, a change to the Delta Diagonal rod was required. Please correct me if I am wrong.

[neurascenic]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

The arms are exactly the same length, so that won't be the case. Brian actually has a very nice jig that keeps the assembled dimensions very precise. The delta radius will vary by builder though, and this is an adjustment that you'll have to do specific to every machine.

Ooop!!! :: Edit ::Yea, what Eaglezsoar said!

----
What is the Delta Radius? Same as "PRINTER_RADIUS" ? and would that affect dimensionality, or just the flatness of the effector motion? So much to learn!

[enggmaug]

delta radius is printer radius minus carriage offset, minus end effector offset, as far as I recall..
It is describedwith a small ASCII drawing in the configuration.h file.


Here is my way of setting Diagonal ROD Length :

I take a piece of millimeter scaled paper, draw a circle of 90mm radius on it.

I then put that on the bed, and align the center of my circle to the tip of nozzle after a G0 X0 Y0 Z0 command. (you can use the LCD menu to lift the nozzle a bit if you need)

I then call the calibration scripts described in the manual. They move the head 90mm on each direction.
I observe where the tip of the nozzle end on the paper in order to adjust the diagonal rod size until I got it right. Use the LCD menu to move the head up adn down to clearly see where it lands on the paper.

I double check by sending the opposite commands (moves at the opposite side of towers).

To be totally true, I do all that at 120mm, not 90mm, because I changed the scripts in order to move the head 120mm when I calibrate, not 90mm.


The scaled paper does not tell me how much to tweek, but makes me feel like I'm in control, and that is crucial.

[Eaglezsoar]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

On page one of the Xnaron Arms topic http://forum.seemecnc.com/viewtopic.php?f=54&t=1704
it says You need to #define END_EFFECTOR_HORIZONTAL_OFFSET 36.5 in configuration.h for the new effector. (if you don't do this you prints will be too large)

Did you do this?

[Lasivian]

Hrrm, the size and arm issue might be because I started with the Tricklaser Carbon arms on the printer.

Anyone else have numbers for adjustments after adding those?

Thanks!

On page one of the Xnaron Arms topic http://forum.seemecnc.com/viewtopic.php?f=54&t=1704
it says You need to #define END_EFFECTOR_HORIZONTAL_OFFSET 36.5 in configuration.h for the new effector. (if you don't do this you prints will be too large)

Did you do this?

No, I did not.

But oddly my prints are too small.

[geneb]

What kind of a size difference are you seeing? What's the actual vs expected?

g.

[Lasivian]

What kind of a size difference are you seeing? What's the actual vs expected?

g.

The parts I am getting are about 1.5mm smaller in each axis.

Thanks

[bdjohns1]

The parts I am getting are about 1.5mm smaller in each axis.

Thanks

1.5mm smaller versus what target dimension? If it's a printer configuration dimensional issue, I'd expect that the % error would be constant in every print, so if you're off 1.5mm on a 100mm dimension, you'd be 0.75mm off on a 50mm dimension.

A good test would be to make up a STL file that just draws a + sign along the x/y axes. Size it for 25, 50, 75, 100mm dimensions, and maybe 4-5 layers tall (enough that you can just use calipers or a ruler on the bed to measure it, then peel off, so you're not wasting filament). You want more than one layer so you can measure up a little bit, since extruder issues can cause the first layer or two of a part to flare out.

[Lasivian]

The parts I am getting are about 1.5mm smaller in each axis.

Thanks

1.5mm smaller versus what target dimension? If it's a printer configuration dimensional issue, I'd expect that the % error would be constant in every print, so if you're off 1.5mm on a 100mm dimension, you'd be 0.75mm off on a 50mm dimension.

A good test would be to make up a STL file that just draws a + sign along the x/y axes. Size it for 25, 50, 75, 100mm dimensions, and maybe 4-5 layers tall (enough that you can just use calipers or a ruler on the bed to measure it, then peel off, so you're not wasting filament). You want more than one layer so you can measure up a little bit, since extruder issues can cause the first layer or two of a part to flare out.

Ok, did some checks last night and most parts come out perfectly sized.

EXCEPT for cylinders. When I printed the studs on some LEGO bits they came out a full 1mm too small. But the square measurements were exact.

Also it seems the issues with filament are related to E-steps. I upped the e-steps and the solid fill became MUCH better.

[Eaglezsoar]

Are you talking about the E-steps on the extruder?

[Lasivian]

Are you talking about the E-steps on the extruder?

Er, yes. I was getting very gappy fill. Once I upper the temp (205 with ultimachine PLA) and the Esteps by 10 it's looking better. Running the .35 nozzle.

Last night I printed the LCD door fan insert and it looked really pretty.

[img]http://www.lasivian.com/coppermine/albu ... G_0020.JPG[/img]
[img]http://www.lasivian.com/coppermine/albu ... G_0018.JPG[/img]

Crappy pictures but the part was great and even fit the door with just a light de-burr.

[Eaglezsoar]

How does that fit the door? Does it fit in the space where the LCD is on the inside of the door?

[Lasivian]

How does that fit the door? Does it fit in the space where the LCD is on the inside of the door?

It fits into the door behind the LCD.

[Eaglezsoar]

How does that fit the door? Does it fit in the space where the LCD is on the inside of the door?

It fits into the door behind the LCD.

Thank you!