<![CDATA[SoliForum - 3D Printing Community — Finaly fitted my E3D hotend]]> 2015-12-14T22:59:20Z PunBB https://www.soliforum.com/topic/13063/finaly-fitted-my-e3d-hotend/ <![CDATA[Re: Finaly fitted my E3D hotend]]> Extrusion multiplier affects how much plastic is pushed out. it can very depending on the plastic but I would not think it would be that much different between pla and abs. Mine are the same. this doesn't generally affect dimensional accuracy. it does affect over or under extruding, which can affect layer bonding and create blobbing.

The dimensional accuracy in your firmware must be calculated according to your belts, pulleys and leadscrews. The xy size compensation takes care of the small variances. Use Josef Prusa's Calculator. http://calculator.josefprusa.cz/

The xy size compensation is meant to calibrate the size in software and is the correct way to fine tune your calibration.
most slicing software has this now.

]]> https://www.soliforum.com/user/10955/ 2015-12-14T22:59:20Z https://www.soliforum.com/post/111620/#p111620 <![CDATA[Re: Finaly fitted my E3D hotend]]> Thanx guys alot for all the help!!

appreciate it alot!

]]> https://www.soliforum.com/user/11562/ 2015-12-14T11:27:03Z https://www.soliforum.com/post/111577/#p111577 <![CDATA[Re: Finaly fitted my E3D hotend]]> As long as all the items you print are made to the correct dimension and then printed at the current settings they will all shrink at the same ratio for the given roll and should fit. You ask for a 20mm cube you get a 19.9 cube you then ask for a 20.1 hole for that 20mm cube to fit in you get a 20.0 hole which still fits your original design dimensions.

3d printers are not at a level to give you the precision of much passed .1mm so if you need that precision you may want to look into a different prototyping technique or different 3d printing such as litho printers using resin and laser or laser sintering of powder and or metal. Of course none of this tech is affordable for the average hobbyist but there are printing services that offer these types of printing for a lower price than owning such a machine.

]]> https://www.soliforum.com/user/7731/ 2015-12-14T05:02:35Z https://www.soliforum.com/post/111569/#p111569 <![CDATA[Re: Finaly fitted my E3D hotend]]> Extrusion multiplier is just a fudge factor for extrusion.  I would agree that changing steps/mm will create a compounding issue.  I also agree with Carl in that what is skewing your measurements is mostly due to shrinkage.  To properly measure that dimension it needs to be of one layer as it is layed on the build platform.  The other thing to try is a cube or several of different dimension.  Try a 50mm cube and see how close that is.  Extrusion width can also play a roll as the Slicer at some points needs to round to the nearest divider of the width.  You can do that math assuming that width is set at a proper .48 mm.  I know you're thinking that it shouldn't matter as it isn't filling that area but that doesn't mean the slicer isn't making room for those paths even though they are unused.  If what you truly need is a perfect 20x20 you'll need to design in all of these factors.  It really isn't a problem but by making your cube design say 20.09x20.09 in your case it should yield that near perfect measurement.  Or do like the rest of us and accept it as it is.

]]> https://www.soliforum.com/user/2291/ 2015-12-14T04:36:30Z https://www.soliforum.com/post/111568/#p111568 <![CDATA[Re: Finaly fitted my E3D hotend]]> Landin81 wrote:

My extrusion multiplier is set to 0.90 on PLA, and on ABS profile its set to 1.0, can that be a different for the prints?

mark.burton wrote:

Generally I don't recommend changing the steps per mm. That is calculated off the  gear size. you run into compounding error compensation if you do that.

Instead you should use the xy size compensation located in your slicer.


In your slicer there is a compensation setting to ad X size to the dimension or remove X size from the dimension that is not where you want it. Of course this will change with each roll.

The standard practice is to load a roll then print an calibration object of known size. I use a 50mm cube that has a 20mm hole bored in each axis.

Once printed and fully cooled you ,measure that object to find out what your shrinkage factor is for that roll. Then you go into your slicer and set it to compensate for that shrinkage factor by +/- x mm.

I don't use RH or Slic3r, but here is the setting in Simplify3d..

http://soliforum.com/i/?KFxYmMH.jpg

]]> https://www.soliforum.com/user/7731/ 2015-12-14T03:14:41Z https://www.soliforum.com/post/111565/#p111565 <![CDATA[Re: Finaly fitted my E3D hotend]]> My extrusion multiplier is set to 0.90 on PLA, and on ABS profile its set to 1.0, can that be a different for the prints?

mark.burton wrote:

Generally I don't recommend changing the steps per mm. That is calculated off the  gear size. you run into compounding error compensation if you do that.

Instead you should use the xy size compensation located in your slicer.

]]> https://www.soliforum.com/user/11562/ 2015-12-14T03:07:39Z https://www.soliforum.com/post/111564/#p111564 <![CDATA[Re: Finaly fitted my E3D hotend]]> Generally I don't recommend changing the steps per mm. That is calculated off the  gear size. you run into compounding error compensation if you do that.

Instead you should use the xy size compensation located in your slicer.

]]> https://www.soliforum.com/user/10955/ 2015-12-13T21:50:33Z https://www.soliforum.com/post/111541/#p111541 <![CDATA[Re: Finaly fitted my E3D hotend]]> Landin81 wrote:

I did download and print a coolingfanmount but there aint any airflow through it =/
I will add a fan without any channels that preventing the airflow next time..

This is my first PLA print. Its a 20x20x20mm testprintbox.

How do I increase the walls so it can be exactly 20mm? Add some on the extrusion width?

http://soliforum.com/i/?IijY2BK.jpg


You have to edit your steps per mm in your firmware for each axis. However that measurement you have there is normal and average for these printers. An error of +/- .1 is normal as the next roll you use could be closer or worse due to due to shrinkage. You will never be able to print an exact 20.00mm cube with two different rolls of filament.

]]> https://www.soliforum.com/user/7731/ 2015-12-13T20:26:08Z https://www.soliforum.com/post/111530/#p111530 <![CDATA[Re: Finaly fitted my E3D hotend]]> I did download and print a coolingfanmount but there aint any airflow through it =/
I will add a fan without any channels that preventing the airflow next time..

This is my first PLA print. Its a 20x20x20mm testprintbox.

How do I increase the walls so it can be exactly 20mm? Add some on the extrusion width?

http://soliforum.com/i/?IijY2BK.jpg

]]> https://www.soliforum.com/user/11562/ 2015-12-13T19:03:31Z https://www.soliforum.com/post/111520/#p111520 <![CDATA[Re: Finaly fitted my E3D hotend]]> Just finished a 2.5 hour ABS print only to realise I forgot to turn on the extruder fan.
Interestingly, it came out fine !
Just goes to show how good a job the E3D heatsink does of cooling.

]]> https://www.soliforum.com/user/6872/ 2015-12-13T08:59:12Z https://www.soliforum.com/post/111496/#p111496 <![CDATA[Re: Finaly fitted my E3D hotend]]> Thanx guys! Im running my first real PLA print now and it seems to come out damn good smile

Using blue painters tape and ofset 0.2 on the z-axis for a test.

]]> https://www.soliforum.com/user/11562/ 2015-12-13T06:01:38Z https://www.soliforum.com/post/111489/#p111489 <![CDATA[Re: Finaly fitted my E3D hotend]]> yah I use 60 as well for pla

]]> https://www.soliforum.com/user/10955/ 2015-12-12T16:03:17Z https://www.soliforum.com/post/111445/#p111445 <![CDATA[Re: Finaly fitted my E3D hotend]]> 60 for PLA with glue.

]]> https://www.soliforum.com/user/6872/ 2015-12-12T11:21:25Z https://www.soliforum.com/post/111425/#p111425 <![CDATA[Re: Finaly fitted my E3D hotend]]> I use 75 for PLA and glue. 60 for hairspray. The nice thing about hairspray is one application is good for about 10 prints before needing refreshing.

]]> https://www.soliforum.com/user/7731/ 2015-12-12T09:51:50Z https://www.soliforum.com/post/111424/#p111424 <![CDATA[Re: Finaly fitted my E3D hotend]]> What kind of temperature do you guys use when printing PLA and use the gluestick?

]]> https://www.soliforum.com/user/11562/ 2015-12-12T08:49:31Z https://www.soliforum.com/post/111423/#p111423