One of the variables in the current design that needs work is the Z-axis...sure,

@Eric_Moy I think that unit REQUIRES power to ‘brake’…

If the power goes off, so does the brake… So it wouldn’t have any effect on power outtage, the Z stage would just drop…

@D_Rob oh, ok - I have mine setup differently, no timeout… To me it’s important that the position gets held indefinitely until I want it to not be held… My firmware originally “unlocked Z” while it was not “in motion” - so that small Z tweaks could be made inbetween layers…

I see this as “Small amounts of error can accumulate between layers”… If I’m doing some crazy-fast prints and the bot is shaking a little I don’t want to lose position!

@Jarred_Baines , not sure, but I was looking foe power off fail safe brakes, which usually have large magnets, so you’re probably right. But honestly, if the power goes out, I can’t see how your print will be saved anyhow, in which case the springs would suffice. The brake is good for any timeout issues.

voila brake http://ecx.images-amazon.com/images/I/41IbJ1hTNOL.SY300.jpg

Lol @ @D_Rob - I get a “translate” button under your post :stuck_out_tongue:

Merci!

me too for voila

see what I mean

@D_Rob A platform crash due to a printer fault or loss of power would be kinda noisy in a quiet house in the middle of the night.

Granted, my current experiences are of a printer with several rough edges left, a properly behaved printer is probably a lot quieter.

yes i can see shot up walls over a loud crash in the night lol will probably drop at the end of prints if there is no custom g code to lower it at the end too

Yeah, even with springs I don’t think I’d be satisfied…

I do like sublime’s idea, but I think that also will limit Z speeds, not a big problem, but if you attempt to raise or lower Z faster than that device will allow, it will cause pain somewhere else (belt slippage, losing steps etc).

It basically just adds friction / resistance to the setup… Solves one problem while possibly introducing another.

Do people consider Z-jumps necessary? I for one DO think they are necessary, especially on a bowden setup.