Hobby, 3D, Relief, CNC  

[ Új üzenetek · Tagok · Fórumszabályzat · Keresés · RSS ]
Oldal 1 / 11
A fórum moderátora: Béni, Amatőr, KisKZ, tweakie 
Fórum » Only in English » DotG Free Etching software English forum » DotG Hardware. (Mechanical and Electrical Designs and Suggestions.)
DotG Hardware.
tweakie Dátum/Date: Szerda, 2012-02-01, 11:08 | Üzenet/Post # 1
alapvető tag
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 972
Kitüntetések/Medals: 6
Hírnév/Fame: 5
Helyzet/Status: Offline
Hi Guys,

An idea I need your help with……

When using DotG for engraving (rather than impact) raising and lowering the Z axis is far too slow and a quicker method is needed. I think we have demonstrated that a ‘dot only’ magnet can pulse at 9 - 10 hits per second (9 - 10Hz) so I am looking for a method that should achieve engraving / drilling results close to that speed.

As it is important to keep the mass of the moving parts to a minimum (if speed is to be maintained) directly driving a standard engraving point with an electromagnet and a brush-less motor seems like the logical solution. Everything has to be kept pretty small and light.

These are my first thoughts for a project which I need your help and suggestions please.

The, high speed, brushless motor drive has already been discussed here on the forum so I think this part is known to work OK – it is all the other stuff.

What do you think guys ??

What are your suggestions please ??

All suggestions will stimulate further ideas and are most welcome.

Tweakie.

Csatolások/Attachments: 5228090.jpg(21Kb)


Success consists of going from failure to failure without loss of enthusiasm.
 
Amatőr Dátum/Date: Szerda, 2012-02-01, 17:43 | Üzenet/Post # 2
alapkő
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 2207
Kitüntetések/Medals: 6
Hírnév/Fame: 3
Helyzet/Status: Offline
tweakie, good idea. Theoretically it must be much faster than screw moved Z axis.
Less weight, simple control.
What I find hard to realize is the bearings. They must spin and let the engraving bit slide.
Maybe a light aluminium housing with a little slide will not increase the moving mass so much.
Anyway, it seems a very good construction to Me.


H1i.hu
 
miki-bá Dátum/Date: Szerda, 2012-02-01, 21:14 | Üzenet/Post # 3
alapvető tag
Csoport/Group: Moderátorok
Üzenetek/Posts: 817
Kitüntetések/Medals: 3
Hírnév/Fame: 2
Helyzet/Status: Offline
Amatőr,
Mivel nem tudok angolul kérlek fordtsd!
A rajzban számomra az nem vilégos ,hogy a gravírtű a csapágyban mozog le-fel az elekrtomágnes működésének hatására?
A forgó tengelyt hogy is lökögetjük le-fel?
Az Én elméletem szerint a pici fortunát és a motort egy egységbe kéne tenni és egy forgásponton keresztül mozgathatóvá tenni.
Ezt az egységet (fortunát) könnyen ki lehet határolni és a tűnyomást is be lehet állítani.Az egészet lehetne mozgatni egy elekrtomágnessel. (Mint a harkály)

Továbbgondolva, a mi kis fortunánkra ( csapágyház) rá lehet tenni egy elktromágnest és akkor máris nem a "Z" mozog.

Üdv

Miki bá


" Ember ,küzdj és bízva bízzál"

http://famakett.hu/
 
KisKZ Dátum/Date: Szerda, 2012-02-01, 21:38 | Üzenet/Post # 4
alapkő
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 3072
Kitüntetések/Medals: 4
Hírnév/Fame: 9
Helyzet/Status: Offline
tweakie,
Translation of Miki-ba's post:

For me not clear this: engraving bit moving up and down in bearing due operation of electormagnet?
We are move rotated axle up-down too?
My idea is make a unit for motor and spindle, and move it around/trougth a hinge point.
On this way more easier set moving bounds and pin pressure of this unit.
This unit can be moved with electromagnet (like woodpecker).

or.... thinking further.....
If we put electromagnet to this unit, it will moving, not Z of CNC Macnine.

(Sorry again because my wrong english!)
 
tweakie Dátum/Date: Csütörtök, 2012-02-02, 09:32 | Üzenet/Post # 5
alapvető tag
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 972
Kitüntetések/Medals: 6
Hírnév/Fame: 5
Helyzet/Status: Offline
Hi Miki bá / Amator,

Thank you for your suggestions.

My thinking here is to keep the mass of the moving engraving spindle to an absolute minimum so it can be moved quickly (9 - 10 Hz).
In theory the engraving spindle should move up and down as well as rotate in it's bearings but the side force imposed by the drive belt may, I now think, cause a problem and restrict this. Perhaps an axial, flexible drive would be better than a belt drive here ??
Certainly moving the motor and spindle with an electromagnet would be a lot quicker than moving the whole Z axis but I wonder what the maximum frequency of vertical movement could be with that layout ??

Please keep the ideas coming in guys.

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
Fórum » Only in English » DotG Free Etching software English forum » DotG Hardware. (Mechanical and Electrical Designs and Suggestions.)
Oldal 1 / 11
Keresés:

Copyright HobbyCnCArt © 2016