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Message from discussion interesting note about the belts on the Ultimaker
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Chuck Ernst  
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 More options Sep 20 2012, 12:54 pm
From: Chuck Ernst <cber...@att.net>
Date: Thu, 20 Sep 2012 09:54:06 -0700 (PDT)
Local: Thurs, Sep 20 2012 12:54 pm
Subject: Re: interesting note about the belts on the Ultimaker
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Oh... and they are about $3.80 a piece.

On Thursday, September 20, 2012 11:52:05 AM UTC-5, Chuck Ernst wrote:

> sorry... just saw the question

> In the 298MXL they only come in fiberglass Neoprene Part number 298MXL025G
> (which I got.... excellent quality... no stretching and no belt tentioners)
> and if you have crazy slack pick up the 297MXL  Part number 297MXL025G  
> also fiberglass only

> If the 300MXL (which the Ultimaker comes with) was working fine then you
> have a couple more options:

> Part number 300MXL025G fiberglass
> Part number 300MXL025UP urethane polyester
> Part number 300MXL025UK Urethane Kevlar

> http://catalog.bbman.com/db/service?domain=bbman&command=locate&categ...

> There is a minimum $35 order so I picked up a bunch to try the different
> types.

> Chuck

> On Tuesday, September 18, 2012 2:41:17 PM UTC-5, Jennigma wrote:

>> Do you have exact part numbers?

>> On Tuesday, September 18, 2012 11:12:42 AM UTC-7, Chuck Ernst wrote:

>>> I eventually bought new belts... slightly shorter 298 and 297 MXL and
>>> eliminated the need for the tentioners... You can buy better quality belts.

>>> they come in the following types...

>>>    - Neoprene
>>>    - Polyurethane
>>>    - Fiberglass, Kevlar® or steel reinforcement available

>>> In the states I bought them here and had zero problems.

>>> http://www.bbman.com/products/belts.html

>>> Chuck

>>> On Monday, September 17, 2012 6:52:06 PM UTC-5, Taylor wrote:

>>>> So, according to this reprap article, the MXL belts the Ultimaker uses
>>>> are not actually well-suited to constantly reversing applications, as they
>>>> are designed for continuous motion in one direction and don't have an
>>>> anti-backlash profile:

>>>> http://mendelmax.com/tikiwiki/tiki-index.php?page=Choosing+Belts+and+...

>>>> They suggest GT2, which might be an interesting upgrade for the UM.

>>>> I'm building a Rostock and I'm using GT2 belts on that, so we'll see
>>>> how that goes. I've never had good layer to layer repeatability on my UM.
>>>> If a layer switches the direction its coming from (say, there's a hole in
>>>> part of the face), I always get a line due to backlash in the system - and
>>>> I've got belt tensioners that I think are working nicely (very stiff piano
>>>> wire).

>>>> Does anyone with other belt tensioners actually have zero backlash?


 
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