Yeah, that datasheet looks like the nominal settings FROM CReality. As soon as you go TMC2208 you get a lot more headroom; I have mine set for 1.1A.
You're right; fysetec's calculator is configured for R100 shunts, not R150. you'll have to do it the hard way with calculating-ily.
So... CReality's documentation blows... you don't know what the real current ratings or °/step on them are.
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
Primarily, you're ordering these steppers so you can have some specs on them...? That's really sad, CREALITY.
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
I've rechecked my VREFs; they're all right where I had them. I figured
"Maybe while I was in there fixing that toasted FET on the hotend..." but no. Still dead on.
![](https://www.eevblog.com/forum/chat/3d-printer-yet/?action=dlattach;attach=1086962;image)
Currently, I'm following through on my earlier threat to build a cardboard box enclosure... figured cost is zero (well, okay... a few glue-stix), so can't hurt to try.
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
That Hemera direct-drive is tasty looking... but I was never a huge fan of the V6.
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/xtongue.gif.pagespeed.ic.J5mTe0A2NA.png)
My biggest gripe with it was always the goofy collar mount, which the Hemera doubles down on their
"special mounts for special people" stupidity by making the stepper motor a special part with T-slots buit-in. You'll need to buy/build/print an adapter, or buy a roller backplate to fit the thing to your E3. KA-CHING!
Aside from that, and the ridiculous price, I like that it's all CNC... but you'd think for that kind of money you'd get some ready-to-use-ness... and you don't. You still have to figure out your own layer cooling and heat-brake cooling solution yourself. Seriously E3D... not even the heat-brake fan is included for that price...?
![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif.pagespeed.ce.8iLbFYV4Bc.gif)
https://www.aliexpress.com/item/1005001525240599.htmlhttps://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20201011074350&SearchText=bondtech+extruderI like the BMG direct-drive extruder; it uses standard parts... except the cloners have produced a nice CNC version for 1/2 the price. And it's not very 'fang-friendly due to tension lever placement.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20201011072619&SearchText=Titan+directThen of course there's the clone Titan direct-drive extruder, which can be had for ~$50 plus you figure out the mounting. I've toyed with that one for a while myself, but it is only single-side drive on the filament and...
*head explodes*mnem
![](https://www.eevblog.com/forum/index.php?action=dlattach;topic=81471.0;attach=818235;image)