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**Jon Heron** · 03-30-2018, 09:39 PM

The MK3 uses a pinda proximity probe on the extruder to sense the bed level, it does a 9 point measure of the bed at the start of every print. Is there a prox on the cetus?
Cheers.
Jon

**Jon Heron** · 03-30-2018, 10:00 PM

Check this out

3 Jaw Lathe Chuck by bobwomble

https://www.thingiverse.com/thing:624625

UPDATE Durwin Pye has sorted out the Scad file so it is now brilliant, Thanks, I have added it to the list of files -not for the faint of heart- After printing some other designs and finding they did not work for me, I decided to have a go myself, So here it is, Please beware, I have made allowances for my own printer so I take no resonsibility if it doesnt work for you. Also, to state the obvious, this is a plastic chuck, it has its limits!. 101mm diameter, 59mm thick plus 25mm jaw height. With thanks to; -Parametric Involute Bevel and Spur Gears by GregFrosthttp://www.thingiverse.com/thing:3575 -Customizable Spiral Generator by walterhttp://www.thingiverse.com/thing:58406 for the hard workUPDATE I have printed and tested (sort of) different jaw materials And added photos ABS,......................Best grip Flexi at 85% infill ..2nd -being flexible they grab well PLA ......................3rd, ok but tend to over tighten, which could break the scroll NYLON..................3rd equal Thanks to MrArrow1961 for the reverse jaws thingiverse.com/thing:624814 Check out this awesome assembly video https://vimeo.com/137431844 by yuri9999! http://www.thingiverse.com/make:155862 I have not included the Scad file at the moment, as it is a real mess, if I can tidy it up I will post at a latter date-DONE Thanks to Durwin Pye for cleaning the scad.

Jon

**RB211** · 03-30-2018, 10:34 PM

Originally posted by Jon Heron View Post

Check this out

3 Jaw Lathe Chuck by bobwomble

https://www.thingiverse.com/thing:624625

UPDATE Durwin Pye has sorted out the Scad file so it is now brilliant, Thanks, I have added it to the list of files -not for the faint of heart- After printing some other designs and finding they did not work for me, I decided to have a go myself, So here it is, Please beware, I have made allowances for my own printer so I take no resonsibility if it doesnt work for you. Also, to state the obvious, this is a plastic chuck, it has its limits!. 101mm diameter, 59mm thick plus 25mm jaw height. With thanks to; -Parametric Involute Bevel and Spur Gears by GregFrosthttp://www.thingiverse.com/thing:3575 -Customizable Spiral Generator by walterhttp://www.thingiverse.com/thing:58406 for the hard workUPDATE I have printed and tested (sort of) different jaw materials And added photos ABS,......................Best grip Flexi at 85% infill ..2nd -being flexible they grab well PLA ......................3rd, ok but tend to over tighten, which could break the scroll NYLON..................3rd equal Thanks to MrArrow1961 for the reverse jaws thingiverse.com/thing:624814 Check out this awesome assembly video https://vimeo.com/137431844 by yuri9999! http://www.thingiverse.com/make:155862 I have not included the Scad file at the moment, as it is a real mess, if I can tidy it up I will post at a latter date-DONE Thanks to Durwin Pye for cleaning the scad.

Jon

That’s one way to use “soft jaws”
Oh, another benefit of PETG, superior layer adhesion

**KJ1I** · 03-30-2018, 11:23 PM

Originally posted by Sun God View Post

They really don't, at least, any more than the first time, and IMHO that should be done at the factory. The whole fixation with bed leveling in the 3D printing community is laughable coming from a machining perspective ...

I'm with Paul on this issue. My Creality CR-10 needed to be leveled on arrival (from New Jersey). After approximately 200 hours of operation, it needed to be re-leveled. The back left corner, where the bed heater cables are attached, was way out of level. I was having loss of adhesion issues, but only on large prints and only on the back left corner. After trying rafts, glue sticks, triple hair spray, it finally dawned on me to check the bed leveling. Problem solved.

**fixerdave** · 03-31-2018, 12:59 AM

Originally posted by Jon Heron View Post

Check this out

3 Jaw Lathe Chuck by bobwomble

https://www.thingiverse.com/thing:624625

UPDATE Durwin Pye has sorted out the Scad file so it is now brilliant, Thanks, I have added it to the list of files -not for the faint of heart- After printing some other designs and finding they did not work for me, I decided to have a go myself, So here it is, Please beware, I have made allowances for my own printer so I take no resonsibility if it doesnt work for you. Also, to state the obvious, this is a plastic chuck, it has its limits!. 101mm diameter, 59mm thick plus 25mm jaw height. With thanks to; -Parametric Involute Bevel and Spur Gears by GregFrosthttp://www.thingiverse.com/thing:3575 -Customizable Spiral Generator by walterhttp://www.thingiverse.com/thing:58406 for the hard workUPDATE I have printed and tested (sort of) different jaw materials And added photos ABS,......................Best grip Flexi at 85% infill ..2nd -being flexible they grab well PLA ......................3rd, ok but tend to over tighten, which could break the scroll NYLON..................3rd equal Thanks to MrArrow1961 for the reverse jaws thingiverse.com/thing:624814 Check out this awesome assembly video https://vimeo.com/137431844 by yuri9999! http://www.thingiverse.com/make:155862 I have not included the Scad file at the moment, as it is a real mess, if I can tidy it up I will post at a latter date-DONE Thanks to Durwin Pye for cleaning the scad.

Jon

Can't say as I'd be worth the effort to print out a whole chuck... but a set of jaws wouldn't be that hard. Maybe leave them a little snug in the slides to they're easy to bore out to whatever size is needed. Once it was all figured out, it would be near zero effort to print out another set for whatever. I was thinking of printing out some single-use collets, jut bore, trim off the nose (that keeps the slits apart), and use as needed. A set of chuck jaws would do just as well, and be easier to use. Of course, something that clipped over the existing jaws would be even easier still, though a little less flexible (in both good and bad ways).

A well, last thing I need right now is another project,

David...

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