[Lab] makerbot

[Sam Roesch]

There is a limit to your speed based on what size/rating of stepper motors
you have, and the gear ratio that translates rotation speed into linear
speed. You can always tell your machine to go slower, but it can't go faster
than what it is mechanically capable of.

The gearing depends on how much force you need.
 In the case of milling: a considerable amount.
 in the case of 3DP: not much at all.

On Thu, Oct 28, 2010 at 2:46 PM, Darcy Whyte <darcy at siteware.com> wrote:

> Isn't the speed of either cutting or printing part of the program? If not,
> isn't it easy to tell the machine what speed to go?
>
> It makes sense to get an extruder head for a cnc machine. Especially if you
> can use the same controllers and software somehow.
>
>
>
>
> On Thu, Oct 28, 2010 at 2:44 PM, Sam Roesch <samroesch at gmail.com> wrote:
>
>> I think the main issues with using one machine for both is whether the
>> machine is built to be fast or strong.
>> Repraps/makerbots are fast, but not strong enough to mill much.
>> CNC mills are usually screw driven, and slower, which might not be a
>> problem if you are patient, but might affect the print none the less, as
>> dialing in a good feed and speed for 3DP seems to be important to getting
>> good prints.
>>
>> That all said, I'm hoping to build one that will be multipurpose too...
>>
>> Sam
>>
>>
>> On Thu, Oct 28, 2010 at 2:35 PM, Darcy Whyte <darcy at siteware.com> wrote:
>>
>>> Sweet, I happen to be using EMC2 at the moment.
>>>
>>>
>>>
>>> On Thu, Oct 28, 2010 at 2:35 PM, Darcy Whyte <darcy at siteware.com> wrote:
>>>
>>>> should I buy a specific nozzle size or is it possible to change the
>>>> nozzle size?
>>>>
>>>> They are sold out of the .25mm. Is that the one I should get?
>>>>
>>>>
>>>>
>>>> On Thu, Oct 28, 2010 at 2:22 PM, Andrew Plumb <andrew at plumb.org> wrote:
>>>>
>>>>> Hey Darcy,
>>>>>
>>>>> I'd recommend picking up one of Rick's:
>>>>> http://www.makergear.com/products/plastruder
>>>>>
>>>>> Very solid, reliable build, and great support.  He also offers a
>>>>> selection of nozzle diameters to get finer detail.
>>>>>
>>>>> Andrew.
>>>>>
>>>>> On 2010-10-28, at 2:04 PM, Darcy Whyte wrote:
>>>>>
>>>>> > I'm either getting or making a CNC milling machine and I'd like to
>>>>> use it as an extruder.
>>>>> >
>>>>> > Is there a nice extruder that I can add (in place of the mill) in
>>>>> order to make plastic things?
>>>>> >
>>>>> >
>>>>> >
>>>>> > --
>>>>> > Darcy Whyte
>>>>> > Darcy at Siteware.com
>>>>> > Ottawa, Canada | 613-563-3634 | N 45° 25'03.1" W 75° 42'21.4"
>>>>> >
>>>>> > Inspirational Flying Machines:
>>>>> > http://www.rubber-power.com
>>>>> > http://www.endlessLift.com
>>>>> > MAAC 23153
>>>>> >
>>>>> > Software services since 1988
>>>>> > Web, Database, LAMP
>>>>> > www.Siteware.com
>>>>> > www.generalSocial.com
>>>>> >
>>>>> > _______________________________________________
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>>>>>
>>>>> --
>>>>>
>>>>> "The future is already here.  It's just not very evenly distributed" --
>>>>> William Gibson
>>>>>
>>>>> Me: http://clothbot.com/wiki/
>>>>>
>>>>>
>>>>>
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>>>>
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