1 Topic by selkess (edited by selkess 2015-03-02 12:43:42)

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Topic: The press have no metal bearings or bushings

i cant see that the press have either bearings or bushings
its just plastic to metal and it will wear down

the rods going inside the carrige inside is no bearing?

can someone explain have someone take apart and look ?

it will wear down when plastic sliding on metal 

why didnt solidoodle put desent bearings on or at least changable bushings

the gear pin for the belt on x and y   just spinning on plastic plate gravity will push it down little by little

im i wrong here or this will be a problem in maybe a year of wear

and solidoodle not saying exactly what grease we should use and how often .

and if mix diffrent greases whitout clean first it can react to plastic in wrong way.

i think this is a problem not many know about or i feel noone care about.

almost all other printers out there have at least changable bushings on the rods
the press have non.  "plastic fantastic" ?

2 Reply by pshcims

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Re: The press have no metal bearings or bushings

What are you talking about exactly?

3 Reply by selkess

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Re: The press have no metal bearings or bushings

pshcims wrote:

What are you talking about exactly?

i change the text so i maybe be more clear ?

4 Reply by jagowilson (edited by jagowilson 2015-03-02 15:29:22)

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Re: The press have no metal bearings or bushings

Are you serious? Could you post some detailed pictures? You should consider upgrading to linear bearings. There are printable carriages in hacks/mods but they won't be compatible with the X rails on the press.

If this is true it's a travesty in my mind. Yes, the carriages are almost guaranteed to fail over time if they are not gliding on bushings or bearings. The friction must be intense! How easy is it to move the carriages by hand? Are you sure they're not riding on cheap nylon or PTFE bushings?

5 Reply by pshcims

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Re: The press have no metal bearings or bushings

The Press is a very inexpensive printer with cheap materials and quality control to match.

I am not an expert, but if you know enough about this issue to see it's a problem, you can probably just use grease as you feel is needed, and be done with it.

Given how many issues existed out of the gate, it's a bit naive to expect any part of this printer to last long term, but it is modular and open source, so you can always fix or upgrade components as you wish.

6 Reply by MacGyverX (edited by MacGyverX 2015-03-02 17:59:06)

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Re: The press have no metal bearings or bushings

I agree with everything except 'modular and open source' part. There is nothing modular about the Press. As for the OS part. The only thing they released was the FW. Only because they had too. And most likely not because they wanted too.

SD Press - v1 (Pre-order) / RAMPs /w DRV8825's / Cyclops (25w) / Dual Bowden / Mk8 Gear / MK2b PCB Heat bed /w custom replacement Z / PEI Bed
SD2 / E3D v6 / Direct Drive / Mk8 Gear / RAMBo v1.3 / PEI Bed / Anti Z backlash mod / Ikea Expedite enclosure.
Both Driven by Octoprint (devel) via a RPi B+ / Neopixel status alerts / GPIO Controlled SSR / (SD2) 450 Watt PSU for remote power-up/shutdown.

7 Reply by pshcims

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Re: The press have no metal bearings or bushings

MacGyverX wrote:

I agree with everything except 'modular and open source' part. There is nothing modular about the Press. As for the OS part. The only thing they released was the FW. Only because they had too. And most likely not because they wanted too.

By modular, I mean you can disassemble any piece and swap it out somewhat easily. There's no proprietary screws or needlessly complex design stopping this.

They used open source firmware, so of course that piece is open source. They didn't really release it themselves, but you can go to that project's source page.

As a result of the firmware being open source, the commands to control the printer are also open. You can use any compatible software you want.

The filament is also standard and there's no attempt to lock out competing filament vendors. They have a special spool for the Press, but you can use any other type with not much compromise.

8 Reply by selkess

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Re: The press have no metal bearings or bushings

I will try get pictures of what im talking about
but im sure there is no bushing  but the person that upgraded to e3dv6 he know if dismantle the press

9 Reply by jagowilson

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Re: The press have no metal bearings or bushings

honestly if there are no bearings or bushings in the carriages i am amazed that you have any sort of precision at all and don't experience INSANE amounts of backlash

10 Reply by selkess

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Re: The press have no metal bearings or bushings

Thats my point. But it will be stable untill start grinding    small small but in long run more even whit grease ?

11 Reply by jagowilson

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Re: The press have no metal bearings or bushings

Depends on the kind of plastic. If those are ABS lithium grease will destroy them pretty quickly, from my understanding.

12 Reply by selkess

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Re: The press have no metal bearings or bushings

So lithium grease is not good or what ?

13 Reply by selkess

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Re: The press have no metal bearings or bushings

we can remodel the carrige so it fits bearings

the only thing we cant change is the small rod for the y motor belt gear its inside plastic in the frame

14 Reply by jagowilson

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Re: The press have no metal bearings or bushings

selkess wrote:

we can remodel the carrige so it fits bearings

the only thing we cant change is the small rod for the y motor belt gear its inside plastic in the frame

Picture? Anything can be changed wink

15 Reply by selkess (edited by selkess 2015-03-05 11:42:35)

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Re: The press have no metal bearings or bushings

i have taken som pictures of my press so hear what you think
would be good if could make 3d model of carrige whit diffrent size so bearing can be fitted or at least changable bushings

picture of under extruder carrige there is screw to access something
https://www.dropbox.com/s/tj31yaud0esza … 4.jpg?dl=0

picture of carrige from outside box behind right plate
https://www.dropbox.com/s/8shgfmhd3tr5w … 2.jpg?dl=0

picture of carrige from inside box left side
https://www.dropbox.com/s/qgz4mp1cq2qwl … 4.jpg?dl=0

picture of carrige from inside box right side
https://www.dropbox.com/s/4ef3sfy4tn70m … 5.jpg?dl=0

16 Reply by MacGyverX

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Re: The press have no metal bearings or bushings

I am not following on what you are asking. Are you wanting to design one? Are you wanting someone else to design one for you?
I am not understanding why you want to change out stock gantry so soon. Granted yeah there are no bearings at all. But that was part of the price of admission here. Low cost = no fancy linear bearing mechanics. I not saying it can't be done. But thats a lot of work.

SD Press - v1 (Pre-order) / RAMPs /w DRV8825's / Cyclops (25w) / Dual Bowden / Mk8 Gear / MK2b PCB Heat bed /w custom replacement Z / PEI Bed
SD2 / E3D v6 / Direct Drive / Mk8 Gear / RAMBo v1.3 / PEI Bed / Anti Z backlash mod / Ikea Expedite enclosure.
Both Driven by Octoprint (devel) via a RPi B+ / Neopixel status alerts / GPIO Controlled SSR / (SD2) 450 Watt PSU for remote power-up/shutdown.

17 Reply by jagowilson (edited by jagowilson 2015-03-05 17:06:41)

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Re: The press have no metal bearings or bushings

MacGyverX wrote:

I am not following on what you are asking. Are you wanting to design one? Are you wanting someone else to design one for you?
I am not understanding why you want to change out stock gantry so soon. Granted yeah there are no bearings at all. But that was part of the price of admission here. Low cost = no fancy linear bearing mechanics. I not saying it can't be done. But thats a lot of work.

I can only imagine the precision is pretty dreadful so I can understand wanting to swap.

OP if you want bearings you are going to have to design your own carriages or determine if you can somehow adapt lawsy's design in hacks/mods for your press.

18 Reply by selkess (edited by selkess 2015-03-06 12:16:07)

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Re: The press have no metal bearings or bushings

People wanted pictures of what i was talking about
just to have discus on possebility on what can be done later of course  its working good now but later maybe need somthing new better.
or if someone maybe already is trying to do same
and get the word out here

And what kind of gease that is best to use when we only have plastic parts on metall.  solidoodle told me to use lithium but not spray can lithium
and that grease that was original on the carriges cant be brough  it was only expensive factory grease.

19 Reply by carl_m1968 (edited by carl_m1968 2015-03-06 19:02:00)

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Re: The press have no metal bearings or bushings

selkess wrote:

People wanted pictures of what i was talking about
just to have discus on possebility on what can be done later of course  its working good now but later maybe need somthing new better.
or if someone maybe already is trying to do same
and get the word out here

And what kind of gease that is best to use when we only have plastic parts on metall.  solidoodle told me to use lithium but not spray can lithium
and that grease that was original on the carriges cant be brough  it was only expensive factory grease.


Use silicone grease like they use for airsoft guns, it wont damage the plastic parts and last a considerably long time.

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