hi
i also thought of that initially.
but i discarded it because i thought this moves the drill in a rotrary way not straight (i know this is
nothing with 50cm arm and 1,5mm pcb with.
you have used it - it is no problem?
how do you operate it (how is that arm moved by you?).
a picture would be very nice, to see the motor mount, and maybe the overall machine to see how it is
operated.
also a look at your bearings would be fine, i have never dismanteled a car clutch (but have a lot of
spare bearings). i don't exacty know what thrust bearings are. my dictionary provides various
translations meaning everything or nothing..
is it a simple bearing with two concentric rings (one smaller, one bigger) and balls between the two?
like the most "ball bearings". or is it of some special type?
regards
st
19.05.2003 09:40:28, Adam Seychell <
adam_seychell@...> wrote:
>I made a pivoting type manual drill press. The drill motor is
>fixed to the end of 500 mm long arm which pivots at its end by
>two thrust bearings (from an old car clutch) that sandwich the
>50x50mm (3 mm wall) square aluminium arm. The difficult part is
>mounting the motor to the end of the arm, because you want it
>adjustable for alignment of the vertical feed and get it
>perfectly parallel. If anyone is interested I will get some
>photos and make them available online.
>
>The advantage of this technique is almost zero side to side play
>without the need of precision linear bearings. You can safely use
> 0.45mm carbide drill bits, the smallest size drill I own.
>
>The disadvantage is the extra bench space required for the long
>arm, which is fixed to a large heavy base like a slab of 18 mm
>MDF particle board. I usually have the habit of over engineering
>my home brew stuff and probably could of made it half the size.
>
>Adam
>
>Stefan Trethan wrote:
>> i thought of manual drill press, moving the pcb with your hand.
>>
>> i know there are such devices sold especially for this task and they are qite expensive.
>> but i'm sure it is possible to get a drill press working properly without these special bearings.
>> if you limit the minimum diameter to 0,8 or 0,6 millimeter.
>>
>>
>> i was wondering how the guys here do the drilling which don't hava a x/y drill cnc machine.
>>
>> regards
>> stefan
>>
>
>
>
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