new effector and carraige

Quote

additional parts required
12 x M3x20 grub screws 12 x M3 Washers 12 x M2 nuts 12 x Nylock nuts

Quote
DADIY
Wouldn't bolting something like this directly to the effector be better, then the width can be in the printed part and a self tapping bolt to hold these on.

[www.ebay.co.uk]

It would also be nice to see a version of this that an e3d hot end would fit, as it looks like quickset nozzle replacements could be an issue.

Quote
Caribou
I had thought about using Neo Magnets insead of the balls and someone has done something like it - part of this "thing" is an E3D adaptor for his effector - I wonder if it's worth looking into modifying this with the Fisher in mind?

Effector using magnets

Quote
DADIY

Quote
Caribou
I had thought about using Neo Magnets insead of the balls and someone has done something like it - part of this "thing" is an E3D adaptor for his effector - I wonder if it's worth looking into modifying this with the Fisher in mind?

Effector using magnets

For printing PLA we would need cooling for the heat sink and the plastic being put down, I would assume all we would need to do is make the current effector big enough to slide the E3D hot end into and use the same type of cooling. I don't the diameter of the e3d so cant compare it.

Quote
geeksarebeta

Quote
DADIY

Quote
Caribou
I had thought about using Neo Magnets insead of the balls and someone has done something like it - part of this "thing" is an E3D adaptor for his effector - I wonder if it's worth looking into modifying this with the Fisher in mind?

Effector using magnets

For printing PLA we would need cooling for the heat sink and the plastic being put down, I would assume all we would need to do is make the current effector big enough to slide the E3D hot end into and use the same type of cooling. I don't the diameter of the e3d so cant compare it.

There are links from the e3d website to documentation, from here you can get to all the drawings for the parts on the hot ends, I was looking earlier at the v6Lite as its the closest to the RRP one, unclear as to whether the cooling fan would be needed on the e3d heatsink if only printing in PLA. Does the current fan on the Fisher also blow over the heatsink?

I will have a look at a design of effector with the e3d hot end when I have time. I've got a model of the whole Fisher on CAD now so will be able to see if it all fits.

Quote
geeksarebeta
Mock up of the threaded rod version of the carriage assembly. Makes the part that carries the load a bit stronger by having more material in it, FYI I do not believe the balls are threaded that deep.

I have ordered some threaded bar to see if it will work, will print a mock up carriage to give it a go.

Quote
bgkdavis
A single threaded bar is exactly what I wanted to avoid with this design, it doenst achieve the end goal of having an easy to adjust ball spacing, you will find that you will have to file the bars down individually to get the spacing's correct.....on the plus side it will give a more robust assembly, but ive been running with my original design for a few months now and its been no problem

Quote
geeksarebeta

Quote
bgkdavis
A single threaded bar is exactly what I wanted to avoid with this design, it doenst achieve the end goal of having an easy to adjust ball spacing, you will find that you will have to file the bars down individually to get the spacing's correct.....on the plus side it will give a more robust assembly, but ive been running with my original design for a few months now and its been no problem

I have had a play with designs of these, and I have to bow down to the better design that bgkdavis has already produced, I do believe that a single threaded bar gives the simplest and most straight forward build procedure and a lower overall parts count, but for the ability to adjust the distance between the balls without bgkdavis has the right solution.

I got some threaded bar but this is limited in length to 50mm / 100mm lengths, because of how deep the balls are threaded the 50mm bar only gives 54mm from ball-end to ball-end, at this distance the rods (RRP supplied) would clash with the nylock nuts. I cannot comment on whether the carbon-arms could cope with being this close together as I do not have any...yet.

I intend to upgrade my Fisher to bgkdavis' design, however I will need to make some accuracy improvements on my own device before printing any replacement parts as my prints are all coming out a little small at the minute.

Quote
Sean.kennedy
Thats a good idea, im fortunate enough to have a ultimaker 2 as well that i use for work. its printing all these peices now using green to yellow thermochromic filament to be able to monitor how hot the pieces are getting while in use.

Quote
bgkdavis
I would suggest that you look at the Fisher 1 effector and do a mashup of my original fisher beta based design and the fisher 1

Quote
bgkdavis
Well its all about cost and simplicity, its far simpler to modify the basic fisher effector than to replace it with a Kossel effector, maybe you should just replace the fisher with a Kossel?

Personally I've never had any problem with the fisher hot end or extruder.

I would suggest that you look at the Fisher 1 effector and do a mashup of my original fisher beta based design and the fisher 1

Quote
DADIY

Quote
bgkdavis
Well its all about cost and simplicity, its far simpler to modify the basic fisher effector than to replace it with a Kossel effector, maybe you should just replace the fisher with a Kossel?

Personally I've never had any problem with the fisher hot end or extruder.

I would suggest that you look at the Fisher 1 effector and do a mashup of my original fisher beta based design and the fisher 1

My thinking was that at some point the hot end will need to be replaced due to the lack of spare parts now available since reprappro closed (quick-set nozzles seem impossible to source at the moment) so when we need to replace the hot end swapping to the Kossel effector and shortening the carriage bolts would be a simple fix.

Now if I had known reprap were going to close and leave us without spares/warranty etc and that the kossel had a version with Duet I would probably have gone that route in the first place. That said now that I've replaced the acrylic parts on the Fisher I am super happy with it.