Difference between revisions of "Equipment/Dahlgren Wizzard 2000 ST"

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{{EquipmentInfobox
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|name=PCB Mill/Micro CNC <!-- Name of the item. -->
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|image=Hackspace_Unknown.png <!-- Image of the item. Leave with placeholder image if none exists. -->
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|model=Dahlgren Wizzard 2000 ST (heavily hacked) <!-- Model -->
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|category=Equipment <!-- Main category. Please leave alone to keep item in this category -->
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|subcat=defunct <!-- Sub-category if one exists. Please check main listing to see other categories contained within the main one -->
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|status=Unknown <!-- Set to one of; Good working order, Faulty, Out of order, Under construction, Out of consumables, Scrapped, or Unknown -->
 +
|consumables=Unknown <!-- Any items used up in normal operation, such as; ink, paper, saw-blades, cutting disks, oil, etc.. -->
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|accessories=Unknown <!-- Any items associated with the equipment but not consumable, such as; drill bits, safety gloves, goggles, etc.. -->
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|reqtraining=Yes <!-- Is training required to use this equipment? Yes or no. -->
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|trainlink=Unknown <!-- If training is required, provide a link to training signup or contact page. Otherwise leave blank. -->
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|acnode=<!-- Is the equipment ACnode locked? -->
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|owner=LHS <!-- Provide a link to owners members page if other than LHS -->
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|origin=Donated <!-- If via pledge, please link to the completed pledge page on the wiki -->
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|location=Basement, Robotics/CNC area <!-- Floor, room/zone and location within that area -->
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|maintainers=Martin_p <!-- NO LINKS PLEASE; it currently breaks the template. If someone is nominated as managing the upkeep of this item, please list them here. -->
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|template_ver=1.1 <!-- Please do not change. Used for tracking out-of-date templates -->
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}}
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This is a project to convert a CNC engraver to also allow it to operate as a CNC pcb drill. The Engraver is a Dahlgren Wizzard 2000 ST. Currently, the engraver is actively worked on by [[User:Martin_p|Martin_p]], and for the time being lives on the floor in the arts/crafts corner. The original roadmap/discussion has been moved to [[Talk:Equipment/Dahlgren_Wizzard_2000_ST|discussion]] for this page.
  
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This is a project to convert a CNC engraver to a CNC pcb drill.
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This wiki page is not written in a chronological order, and relevant sections will be updated as the work progresses. I am using my phone camera for taking the pictures, so please excuse their poor documentation-only quality. Please feel free to contact me with any suggestions, or correct any errors or omissions.
  
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The Engraver is a Dahlgren Wizzard 2000 ST.
 
  
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== It needs ==
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== Resources ==
 +
All resources, PCB designs and arduino C++ files live on [https://github.com/martin-pr/cnc-router-hack GitHub]. Feel free to look around and/or contribute (but please email me first).
  
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* a little bit of a clean up.
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== Mechanics ==
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* 3 x stepper motors (NEMA 14 by the looks of it)
 
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**I've got a nema 17 and may be able to source 2 more. Would that fit ? -artag
 
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* a way of connecting the steppers to the leadscrews.
 
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**Hipster has some couplers of a type that are now really cheap on ebay
 
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* a drill of some kind.
 
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**Some people are using aero/quadcopter motors. Would the controller handle one ? might need a sensorfull motor
 
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* a way to fix the drill to the x/y platform.
 
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* chuck for the drill.
 
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**Collets are much better than a chuck. An ER12 collet chuck would be better than the cheap dremel style, but needs a decent sized motor shaft. There may be something more suitable for auto toolchange (one day)
 
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* small drill bits.
 
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* some rewireing to fix endstops etc.
 
  
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At the moment the engraver comes with an embedded computer (386FX!), which powers up and works fine, and is connected to a control board that has 3 x [http://imshome.com/products/im481h.html stepper drivers] and a [http://www.onsemi.com/pub_link/Collateral/MC33035-D.PDF brushless dc motor controller] on it.
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[[File:CNC_full_view.jpg|thumb|left|Original state (without cover) - full view]]
  
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== Choices ==
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=== Original state ===
 +
Apart from lots of dirt and a bit of rust, the mechanical parts were in a reasonable order. The most important missing bits were:
 +
* 3x NEMA 23 motors
 +
* 2x 6mm flexible coupling
 +
* z-axis pulley (6mm shaft)
 +
* working bed
 +
* main motor and belt between the rotary tool bit and the motor
 +
* bit mounting mechanism (only a torso of it left)
  
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We've got 3 main choices:
 
  
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# Use the existing controller, but we'd need to give it the steppers and drill that it expects.
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<br clear=all>
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# Chuck the existing control board and use an arduino or something to talk to the [http://imshome.com/products/im481h.html existing drivers]
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== Electronics ==
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# Chuck all the electronics and do it all our selves.
 
  
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The first may be the quickest, but we'd need to get identical parts - the manufacturer may sell them, which might make them more expensive.
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=== Original state ===
 +
Electronics was split into 3 boards - driver/power source, a 386 controlling board and a front display/buttons board.  
  
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The second will involve some hardware reverse enginerring to work out the pinouts to talk the existing drivers
+
===== Driver board =====
 +
The driver board was in a good shape, and seemed to be relatively easy to hack. The power source is 35V (motors) and 5V (electronics, stabilised), and works beautifully. The middle part contains a 6-phase motor driver, and will probably not end up used in the end. The stepper motor drivers are older versions, but fully functional, hardwired to use 1/10 substeps, and 800mA peak current.
  
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The 3rd might also be fairly easy - presumably we can use the reprap style electronics with it??
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===== Control board =====
 +
The 386 machine refused to cooperate because of the missing main motor, and as it would be very hard to reverse-engineer it anyway, I went with the suggestion from the original discussion and ditched it.
  
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== Pics ==
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===== Display/buttons board =====
 +
[[File:cnc front.jpeg|thumb|left|Front panel]]
 +
The front board contains a set of buttons, a HD44780-compatible two lines LCD display and 3 pots, all in a very hackable working order.
  
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* [http://pointless.net/photos/id/1363117805/ stepper drivers]
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<br clear=all>
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* [http://pointless.net/photos/id/1363117840/ other bits on the interface board]
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=== Arduino ===
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* [http://pointless.net/photos/id/1363120494/ 386 computer + transformer]
+
 
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* [http://pointless.net/photos/id/1363120499/ top view]
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===== Pin assignment =====
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* [http://pointless.net/photos/id/1363120512/ view of the mounting thing for a stepper, NEMA 14?]
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* [http://pointless.net/photos/id/1363120524/ the cover]
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{| class="wikitable"
 +
!
 +
!pin
 +
!meaning
 +
|-
 +
|rowspan="2"|serial
 +
|D0
 +
|RX
 +
|-
 +
|D1
 +
|TX
 +
|-
 +
|rowspan="5"|X+Y
 +
|D2
 +
|step X
 +
|-
 +
|D3
 +
|dir X
 +
|-
 +
|D4
 +
|enable X+Y
 +
|-
 +
|D5
 +
|step Y
 +
|-
 +
|D6
 +
|dir Y
 +
|-
 +
|rowspan="3"|Z
 +
|D7
 +
|enable Z
 +
|-
 +
|D8
 +
|step Z
 +
|-
 +
|D9
 +
|dir Z
 +
|-
 +
|
 +
|D10
 +
|piezo
 +
!colspan=2|shift reg
 +
|-
 +
|rowspan="3"|LCD
 +
|D11
 +
|clk
 +
|0
 +
|RS
 +
|-
 +
|D12
 +
|data
 +
|1
 +
|R/W
 +
|-
 +
|D13
 +
|strobe
 +
|2
 +
|clk
 +
|-
 +
|
 +
|
 +
|
 +
|3
 +
|(not connected)
 +
|-
 +
|
 +
|
 +
|
 +
|4
 +
|bit 4
 +
|-
 +
|
 +
|
 +
|
 +
|5
 +
|bit 5
 +
|-
 +
|
 +
|
 +
|
 +
|6
 +
|bit 6
 +
|-
 +
|
 +
|
 +
|
 +
|7
 +
|bit 7
 +
 
 +
|}
 +
 
 +
<br clear=all>
 +
 
 +
== Software ==
 +
All sources live on [https://github.com/martin-pr/cnc-router-hack GitHub], both for [https://github.com/martin-pr/cnc-router-hack/tree/master/arduino Arduino] and for Linux side (not yet implemented).
 +
 
 +
=== Original state ===
 +
Because I decided to ditch the 386-based control board early on, the original state was non-existent.
 +
 
 +
=== Arduino ===
 +
The main part of hard work is done by an Arduino Nano. It is connected directly to the motor drivers, endstops, display and buttons. It receives its data via a USB/RS232 serial port.
 +
 
 +
 
 +
[[Category:PCB making]]
 +
[[Category:Projects]]

Latest revision as of 11:53, 21 January 2019

PCB Mill/Micro CNC
Hackspace Unknown.png
Model Dahlgren Wizzard 2000 ST (heavily hacked)
Sub-category defunct
Status Unknown
Consumables Unknown
Accessories Unknown
Training requirement Yes
Training link Unknown
Owner LHS
Origin Donated
Location Basement, Robotics/CNC area
Maintainers Martin_p

This is a project to convert a CNC engraver to also allow it to operate as a CNC pcb drill. The Engraver is a Dahlgren Wizzard 2000 ST. Currently, the engraver is actively worked on by Martin_p, and for the time being lives on the floor in the arts/crafts corner. The original roadmap/discussion has been moved to discussion for this page.

This wiki page is not written in a chronological order, and relevant sections will be updated as the work progresses. I am using my phone camera for taking the pictures, so please excuse their poor documentation-only quality. Please feel free to contact me with any suggestions, or correct any errors or omissions.


Resources

All resources, PCB designs and arduino C++ files live on GitHub. Feel free to look around and/or contribute (but please email me first).

Mechanics

Original state (without cover) - full view

Original state

Apart from lots of dirt and a bit of rust, the mechanical parts were in a reasonable order. The most important missing bits were:

  • 3x NEMA 23 motors
  • 2x 6mm flexible coupling
  • z-axis pulley (6mm shaft)
  • working bed
  • main motor and belt between the rotary tool bit and the motor
  • bit mounting mechanism (only a torso of it left)



Electronics

Original state

Electronics was split into 3 boards - driver/power source, a 386 controlling board and a front display/buttons board.

Driver board

The driver board was in a good shape, and seemed to be relatively easy to hack. The power source is 35V (motors) and 5V (electronics, stabilised), and works beautifully. The middle part contains a 6-phase motor driver, and will probably not end up used in the end. The stepper motor drivers are older versions, but fully functional, hardwired to use 1/10 substeps, and 800mA peak current.

Control board

The 386 machine refused to cooperate because of the missing main motor, and as it would be very hard to reverse-engineer it anyway, I went with the suggestion from the original discussion and ditched it.

Display/buttons board
Front panel

The front board contains a set of buttons, a HD44780-compatible two lines LCD display and 3 pots, all in a very hackable working order.


Arduino

Pin assignment
pin meaning
serial D0 RX
D1 TX
X+Y D2 step X
D3 dir X
D4 enable X+Y
D5 step Y
D6 dir Y
Z D7 enable Z
D8 step Z
D9 dir Z
D10 piezo shift reg
LCD D11 clk 0 RS
D12 data 1 R/W
D13 strobe 2 clk
3 (not connected)
4 bit 4
5 bit 5
6 bit 6
7 bit 7


Software

All sources live on GitHub, both for Arduino and for Linux side (not yet implemented).

Original state

Because I decided to ditch the 386-based control board early on, the original state was non-existent.

Arduino

The main part of hard work is done by an Arduino Nano. It is connected directly to the motor drivers, endstops, display and buttons. It receives its data via a USB/RS232 serial port.

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