Questions re: Room temp and Zaxis ignoring movements

[daftscience]

Right now I'm working on getting my printer working. I've been sifting through the forum and I Think I've found a lot of useful info that I will try when I get home.

I have a couple of questions that I haven't seen answers to though. The first is when I am manually moving the nozzle on the Z axis using the .1mm adjustment it will ignore every 3rd movement. Does this have to do with the DEFAULT_AXIS_STEPS_PER_UNIT values for XY&Z all ending in .333? I am not sure if this is normal operation or not.

Second, question is about room temperature. My place is usually pretty cold and I've noticed that the stickralon build plate seems to warp when the bed is heated, should I just switch to solid glass? Also has anyone noticed this effecting extrusion of filament?

Thanks,
Tom

[mhackney]

I am waiting for my Max to ship but I do own an h-1 and H1-1 so I do have some experience.

Is the skipping every third .1mm step completely consistent? I mea, does it do this every time all the time? I've not run into that at all and I have a steps per ending in .67. I always round my steps per to the 100ths place (32.67 mm for instance). Have you tried that? .01mm is almost .0004" and our printers have no where near that resolution. Give that a try.

As for room temp - I run my printer in my basement shop. The temp can get pretty cool down there and I have had issues with filament sticking to the plate until I went with a heated bed. I always print on a glass plated either directly or on blue tape or kapton tape. It will never warp and is dead flat (for our purposes).

regards,
Michael

[Polygonhell]

Right now I'm working on getting my printer working. I've been sifting through the forum and I Think I've found a lot of useful info that I will try when I get home.

I have a couple of questions that I haven't seen answers to though. The first is when I am manually moving the nozzle on the Z axis using the .1mm adjustment it will ignore every 3rd movement. Does this have to do with the DEFAULT_AXIS_STEPS_PER_UNIT values for XY&Z all ending in .333? I am not sure if this is normal operation or not.

Yes it's normal, Marlin ignores, or rather buffers moves less than 5 steps (it's a constant in configuration_adv.h) to try and coalesce them with subsequent moves.
For this reason you cannot trust the displayed XYZ in repetier host, M114 will show the actual position.
If you are trying to go to a specific location do it by entering G codes into the command box, and always move so that you move to the position from a point at least 1mm away.

Repetier firmware doesn't exhibit this behavior.

Room temperature matters, but not all that much, I've printed in PLA in my garage with the ambient temperature in the 3C range, you may have issues with ABS warping more with low ambient temperature.

I destroyed my polycarbonate build plate before I could spend any time messing with it, but if it's not staying flat, just use glass with Kapton/PET or at a push Blue painters tape on it.

[daftscience]

Thanks guys. That makes me feel a bit better about the movements. I also think I will definately have to invest in some glass. I am using a piece of Acrylic I had lying around as a build surface.

I took some pictures of my first "successful?" print.
Zero retraction, ABS @ 230C.

[img]http://i.imgur.com/GC0AJLe.jpg[/img]
[img]http://i.imgur.com/QWjP3Wbh.jpg[/img]

(The rest of the album)http://imgur.com/a/1RxaG#6


I'm excited, this is my first 3d printer and I have almost no clue what I'm doing so any progress is exciting.

Tom.