What do you do to adjust the x-module when it is out of alignment? Do you just tap the carriage on one of the Z-modules, or do you actually loosen the mounting bolts fastening the X-linear module to the Z-module carriages and tap on the X-module?
I used a machinist’s square when setting up the Z-axis modules, so I am pretty confident about those, but there doesn’t seem to be a good way to adjust the X-axis module.
I don’t loosen any bolts, there is enough play in the bearing tension mechanism internal to the module that allows it to rotate a couple degrees.
Although the first time I did it, after I was sure it was square I did loosen and retighten the bolts so that there was no residual stress.
Now I can be confident when I return it to tram there should not be any residual stress.
In my case its also good to do a M18 and push X manualy to full height and its align.
I originally put 1-2-3 blocks on the table and ran the X-axis down to them. There was a .021" difference in height, based on feeler gauge. Moving the blocks to the rails, it was more like .006", which I aligned after loosening the bolts. The remainder of the difference looks to be in the carriage of the table; I put a .015" shim in between the Y-axis sled and the carriage (on the low side). From there, tapping the sled of the Z-axis linear module was sufficient to get them to the same height by feeler gauge.
Going to see how this shim works out; I really don’t like using shims. Some day I’ll pop the carriage off and put it on a surface plate, use a surface/height gauge to determine which mounting points are off.
That’s good stefix, unfortunately for me my bed isn’t the same orientation as the top end stops, so that doesn’t work.
If i am understanding correctly you are suggesting rather than tramming down to blocks on the y rails. Tram up to the top of the Z modules?
So M18 E, then adjust, then M17 E to re-enable (and this requires no power off?)
I am interested in this approach as tramming down has never fixed my issue as i can’t seem to lower the left side to make any difference - its like as soon as i print or calibrate it ignores the tramming i did (plus i never got the X module to cause any friction of the left side 123 blocks as i slide them in and out…
Unfortunately the chances of stefix answering is rather low, rest in peace.
Yes, some people the stops at the top of the Z axis works perfectly adequately. Snapmaker never spoke to the tolerance they were manufactured to, and for my machine that does not result in acceptable results.
Yes, except not the E axis, the Z axis.
I mean, that’s the procedure described in the instruction manual.
thanks guys, sorry to hear about stefix
Ah I thought the E was enable the setting, hadn’t grokked there is an E axis.
Yes I did that when the manual told me to and forever forgot about it since. ;-).
A quick check on the top of the z modules with my straight edge doesn’t reveal any obvious difference in height.
I did a quick calibration mesh to see upwards tramming altered the numbers - not really still ~1mm slope to the left.
As a sanity check have you made sure both modules are correctly seated in the indents? You could also check to see if swapping the modules causes there to be a tilt in the opposite direction.
Good suggestions, yes, i was very careful about that at initial build and even took pictures of every step of the build to make sure i could locate any mistakes they are nicely within their indents. I have thought about swapping the two y modules around, haven’t done it as i will have to take the machine back out of the enclosure and strip the whole darn thing down. Have some things support has asked me to measure that i still need to measure. They think either the z bars are running at different speeds (i don’t think this is the case, but will still take the measurements asked for). Or some combo of the platform / heated plate / build surface is warped. This despite telling them several times the slope persists when i rotate all 3 180 deg around their center. I am beginning to suspect my base is warped… but not sure / need to prove that.
@scyto have you taken off the x axis and maually moved both z rail brackets to the very top and measured with a micrometer the distance of each bracket to the top of the rail?
funny you ask, that’s exactly the state the machine is in.
today is playing with pi and octoprint setup because all the measuring is doing my head in 
@scyto im going to respond on your official topic to avoid clogging this one more.
