Delta experts: feedback appreciated

Danal

Yes, the "rule of thumb" limit on low angle is 20 degrees (and that always occurs opposite a tower). You are comfortably away from that. None of the other angles really matter.

bartolomeus

@Danal Thanks, I thought I saw DC42 mention somewhere that the center or high angles can have an affect on resolution. But it's hard to find any info on that. Thats why I asked for verification.

I can still put a 260mm bed in this setup, and the low angle then is about 22deg.

fcwilt

@bartolomeus said in Delta experts: feedback appreciated:

I think I am almost done with th ebasic frame layout.

I just received an email about the Zesty Nimble V2. I did have a nimble before, but wasn't 100% satisfied.
Now I am in doubt about the extruder setup:

Fying extruder

Nimble V2

Or 4th axis extruder?

I have used Nimbles on all my printers and they have worked well for me.

What problems did you have?

It would be much simpler than a flying extruder.

Frederick

Danal

I would go big. 22 is fine.

bartolomeus

@fcwilt said in Delta experts: feedback appreciated:

@bartolomeus said in Delta experts: feedback appreciated:

I think I am almost done with th ebasic frame layout.

I just received an email about the Zesty Nimble V2. I did have a nimble before, but wasn't 100% satisfied.
Now I am in doubt about the extruder setup:

Fying extruder

Nimble V2

Or 4th axis extruder?

I have used Nimbles on all my printers and they have worked well for me.

What problems did you have?

It would be much simpler than a flying extruder.

Frederick

I never totally got rid of the wave pattern on the surfaces, even after I used the specified grease and also after they sent me a new worm gear.

fcwilt

Hi,

Just another thought.

Even if you don't go with a flying extruder you might want to keep the two additional "towers" and design some diagonal bracing between them and the rear tower.

Keeping things square with no bracing can be a challenge.

Frederick

bartolomeus

@Danal Maybe in the future, I have a new 240mm bed ready to be installed. I'd like to have a 260mm one made out of tooling plate, but my funds have vanished....

fcwilt

@bartolomeus said in Delta experts: feedback appreciated:

@fcwilt said in Delta experts: feedback appreciated:

@bartolomeus said in Delta experts: feedback appreciated:

I think I am almost done with th ebasic frame layout.

I just received an email about the Zesty Nimble V2. I did have a nimble before, but wasn't 100% satisfied.
Now I am in doubt about the extruder setup:

Fying extruder

Nimble V2

Or 4th axis extruder?

I have used Nimbles on all my printers and they have worked well for me.

What problems did you have?

It would be much simpler than a flying extruder.

Frederick

I never totally got rid of the wave pattern on the surfaces, even after I used the specified grease and also after they sent me a new worm gear.

Hmm...

I had problems with my deltas but that wasn't one of them. What was the supposed cause?

Frederick

bartolomeus

@fcwilt Yes, @Danal already mentioned the bracing. I'll build the frame first, and then decide if and how I will make some bracing.

bartolomeus

@fcwilt said in Delta experts: feedback appreciated:

@bartolomeus said in Delta experts: feedback appreciated:

@fcwilt said in Delta experts: feedback appreciated:

@bartolomeus said in Delta experts: feedback appreciated:

I think I am almost done with th ebasic frame layout.

I just received an email about the Zesty Nimble V2. I did have a nimble before, but wasn't 100% satisfied.
Now I am in doubt about the extruder setup:

Fying extruder

Nimble V2

Or 4th axis extruder?

I have used Nimbles on all my printers and they have worked well for me.

What problems did you have?

It would be much simpler than a flying extruder.

Frederick

I never totally got rid of the wave pattern on the surfaces, even after I used the specified grease and also after they sent me a new worm gear.

Hmm...

I had problems with my deltas but that wasn't one of them. What was the supposed cause?

Frederick

In the beginning many people had wave patterns on the surface of their prints with a Nimble. Most of these patterns disappeared by replacing the supplied lubricant with some silicone grease. The Nimbles are now supplied as standard with the silicone grease I believe. But somehow I couldn't get rid of it.

fcwilt

@bartolomeus said in Delta experts: feedback appreciated:

In the beginning many people had wave patterns on the surface of their prints with a Nimble. Most of these patterns disappeared by replacing the supplied lubricant with some silicone grease. The Nimbles are now supplied as standard with the silicone grease I believe. But somehow I couldn't get rid of it.

Thanks for that info.

I guess I got lucky.

Frederick

bartolomeus

Whilst waiting for parts to arrive, I modified the design to a standard 3 tower delta. As a result the footprint is alot smaller.

fcwilt

I wonder if you will be able to get the vertical extrusions square to the base and top.

Screws into the ends of the extrusions won't have much leverage.

Looking forward to your progress.

Thanks.

Frederick

bartolomeus

@fcwilt said in Delta experts: feedback appreciated:

I wonder if you will be able to get the vertical extrusions square to the base and top.

Screws into the ends of the extrusions won't have much leverage.

Looking forward to your progress.

Thanks.

Frederick

Same here. I am relying on the supplier of the extrusions that they are precisely cut and the same length.

Otoh, the 3 tower frame is only 5 parts (2 plates and 3 towers). My (upgraded) Anycubic Delta frame was made of 18 parts (6 corners, 3 towers, 9 horizontals) and it printed pretty good. I am hoping the lower part count and precisely machined parts will pay off.

blt3dp

@bartolomeus said in Delta experts: feedback appreciated:

@fcwilt said in Delta experts: feedback appreciated:

I wonder if you will be able to get the vertical extrusions square to the base and top.

Screws into the ends of the extrusions won't have much leverage.

Looking forward to your progress.

Thanks.

Frederick

Same here. I am relying on the supplier of the extrusions that they are precisely cut and the same length.

Otoh, the 3 tower frame is only 5 parts (2 plates and 3 towers). My (upgraded) Anycubic Delta frame was made of 18 parts (6 corners, 3 towers, 9 horizontals) and it printed pretty good. I am hoping the lower part count and precisely machined parts will pay off.

These are the reasons why I went with 4060 on mine, because it has a wider base and instead of the screws being all on one dimension, they're on two.

I also got mine milled square by a machine shop. It's incredibly accurate when done right.

bartolomeus

@blt3dp said in Delta experts: feedback appreciated:

@bartolomeus said in Delta experts: feedback appreciated:

@fcwilt said in Delta experts: feedback appreciated:

I wonder if you will be able to get the vertical extrusions square to the base and top.

Screws into the ends of the extrusions won't have much leverage.

Looking forward to your progress.

Thanks.

Frederick

Same here. I am relying on the supplier of the extrusions that they are precisely cut and the same length.

Otoh, the 3 tower frame is only 5 parts (2 plates and 3 towers). My (upgraded) Anycubic Delta frame was made of 18 parts (6 corners, 3 towers, 9 horizontals) and it printed pretty good. I am hoping the lower part count and precisely machined parts will pay off.

These are the reasons why I went with 4060 on mine, because it has a wider base and instead of the screws being all on one dimension, they're on two.

I also got mine milled square by a machine shop. It's incredibly accurate when done right.

I did start out with a design based on 4060, but figured it would be overkill for a 240mm bed. I have already started on a 320-330mm bed version which will use 4060, however I am not sure if I will continue with the design or if I will build it.

DeltaCon

@fcwilt said in Delta experts: feedback appreciated:

I wonder if you will be able to get the vertical extrusions square to the base and top.
Screws into the ends of the extrusions won't have much leverage.

What exactly do you mean with "won't have much levarage?"
Im am not an engineer, but my gut tells me that the direct metal to metal construction without corners will be much stiffer than anything that does use corners. The cuts of the extrusions will indeed have to be precise, but getting anything using corners precise and straight is also a PITA... Maybe the construction will gain stiffness if the verticals are rotated 90 degrees.

fcwilt

@DeltaCon said in Delta experts: feedback appreciated:

What exactly do you mean with "won't have much levarage?"

The extrusions are going to be tall in relation to their cross section.

Consider the diagram below. For a given force applied at the red arrow, to counteract that the required force applied at the green arrow on the right is going to be less than the required force applied at the green arrow on the left, because the lever arm is longer proving more leverage.

Frederick

Leverage Example.jpg

DeltaCon

Thanks, that much physics I do understand
In the left figure however, there is only one surface getting that force applied and possibly giving room for error. In the right fugure, if you use corner brackets, or those ugly cube-shaped things(that are often unsquare by default) you aply the force to more contact surfaces so giving more room for error. In my opinion it is not about the length of the arms, but about the stiffness of the joint. Less is more in this case.

bartolomeus

Fun has started: