There are a lot of misgivings on the CNC side of our SM 2.0, one of the worst is flex.
I’ve ordered these parts to try and add rigidity
https://www.igus.com.au/product?artNr=WS-10-UNGEBOHRT
https://www.igus.com.au/product?artNr=WJ200UM-01-10-AL
Screwed to the Z axis rail with a bracket to the rear of the module mount bracket hopefully adds some rigidity.
I’ll measure deflection when the rails arrive
Pug
Nice find. Definitely looking forward to see how it goes
Do you mean to the x-axis linear module and the toolhead bracket?
-S
That could be useful as well, although it might make changing toolheads rather challenging…
As I understood it, screwed to the Z-axis (both sides) and to the mounting brackets where the x-axis is bolted onto to.
to the z-axis reduce play of the entire x-axis module. on top of the x-axis reduces play on the toolhead wobble.
The pillow block would be mounted to the x-axis head support. The rail would be mounted to the x axis rail. This would eliminate rotation flex of the head in relation to the rail. Right?
You would probably have to CNC the holes into the x-axis rail to make sure it’s mounted straight.
This would be a fun little drawing project. Anyone have a fusion drawing of the Snapmaker linear rails?
John
Following that!
Btw., one Facebook user has invested quite some effort in getting things more robust. Here’s a selection of sources from that user for inspiration (unfortunately some are German):
https://www.facebook.com/groups/178966772812413/search?q=hausknecht
I went looking for some F360 files and found this guy that did a lot of mods to his A350. Unfortunately, he passed away earlier this year. Here’s the link to the F360 files and his awesome machine mods.
My new Snapmaker 2.0 A351 
- Snapmaker Showcase - Snapmaker: where creation happens
Yes I did mean the X axis module (to avoid flex in the Z axis…)
I’m not going to go as far as some of the other machine mods listed here. I do not want to add to much weight hence the aluminium drylin profile
If it proves to be an advantage I will look at the same guide system for other axis that may benefit
Pug
Looking at some of the deflections across the entire machine (just with a square, dial indicator on its way)
It is no wonder one of those guys braced the Z modules… I may have to put guides everywhere to make any real impact
Pug
While this should not be issue when using the CNC, as there should not be any heat, it may be a problem when 3D Printing. LCDs typically don’t like temperatures above 120°F, and at a certain temperature they stop working and turn black. When the heated bed is on, the temperature inside the enclosure can increase to a level where the LCD stops working.
I’ts a bracket to relocate the touchscreen from the bottom to the top, there should be no change in temperature!
touchscreen v1.stl (22.9 KB)
@pugs what I was referring to is that the temperature at the top of the enclosure will be higher than it is at the bottom. The higher temperature at the top, especially when printing ABS, can get high enough that the TouchPad temperature will increase to a level where the LCD stops working. If you don’t print with ABS, ASA, or anything that requires that high of a bed temperature, then you are probably safe.
Not the same thing, but in that same vein, I wonder if the designers tested the (main) controller longevity in an enclosure at 100F+. Seems like it also would benefit from relocation to the outside of the enclosure, but the cables aren’t long enough without getting creative.
The bracket is actually ASA-CF
I’ll check temps but I doubt any real issue moving it 300mm up
Pug
You can use a usb-c extension.
Not all work. There’s a thread discussing this.
-S
I meant the main controller the axes all plug in to, sorry that was a bit ambiguous
Rails received, pics for basic placement (one either side)
Now to find some time to design and print/machine some brackets. I’ll measure deflection with a dial indicator and a luggage scale lol, not getting fancy with load cells!
Bearing is neat but might need a bit of preload, there is not much room to add a second pillow block and access to the module fixing screws will be impacted slightly (might need to cut down an Allen key)
If it helps I’ll work the remaining axis as this is a lightweight and relatively inexpensive rigidity modification.
Pug
Might be able to fit a second pillow block with a slightly longer rail but module fixing will be further impacted 
Pugglings…
Ah, so you do intend to to mount it to the x-axis?
If I look at my machine the biggest flex seems to be not the module head itself, but the entire x-axis. So I (wrongly) assumed you were going to mount them to the z-axis vertically to brace the x-axis and making sure that one doesn’t wobble.
And are the screws to mount the toolhead still easily accessible this way?
