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• Eppur si muove!

  Rafael Serrano • 01/21/2021 at 20:17 • 0 comments

• Updates on GitHub

  Rafael Serrano • 10/27/2019 at 11:28 • 0 comments

  Today I've added links to github for the operating system, pcb tools and some other utilities for the project.

• Limit sensors

  Rafael Serrano • 08/11/2019 at 19:36 • 0 comments

  Lately this week I've installed the X and Y axis limit sensors. Each sensor is mounted into the supports of the linear guides. Said sensors have each two LED's indicators and work at 5 volts — this can be changed to any voltage, though.

  Thera are a RAR archive with schematics and board files in Eagle format.
  

• Basic structure finished

  Rafael Serrano • 08/04/2018 at 10:21 • 0 comments

  After almost two years, the basic structure of the project is finally finished  ― axes X and Y.
  It is necessary to fix some details of the CAD files. Also, the list of materials has to be written as well. From now on, I will continue to develop the electronic controls of the motors and limit detectors.

  As for the Z axis, it is not yet decided how to implement it and is still under study.

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  The Axis V1.0:

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  Y motor detail view from rear:

  
  

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  Y slider:

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  Base structure:

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  Y motors:

  
  

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  Y free pulley detail:

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  X motor:
  

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  X axis from bottom:
  

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  Y slider detail:
  

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  View of X axis from motor side:
  

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  That's all for now. Follow the project for more updates.
  

• The last axis changes details

  Rafael Serrano • 04/01/2018 at 15:59 • 0 comments

  Y axis motor:
  

  Y axis pulley:

  X axis motor:

  X axis pulley:

• Latest design changes.

  Rafael Serrano • 03/31/2018 at 20:15 • 0 comments

  After a few months of inactivity, I continue with the Axis project.
  

  
  

  Y axis:
  

  • Change in the system of hooking the drive belt, which involves raising the motor, and the free pulley.
  • Change in the support plate of the X axis

  
  

  X axis:
  

  • Remodeling complete, to work with the guides in vertical.
  • Use the same philosophy as in the Y axis

  
  

  Z axis:
  

  • Replanting the system. To study.

  In a few days the base structure and the Y axis will be completed.

• Y-Axis motor module

  Rafael Serrano • 07/30/2017 at 12:52 • 0 comments

  Today I finished machining and mounting the Y-axis motor module. All measurements and tolerances seem correct. Anodizing is missing, but we'll leave it for later. In a few days I will have the entire structure.

• Aluminium parts for Y-Axis

  Rafael Serrano • 07/02/2017 at 16:42 • 0 comments

  I've finally received the aluminum parts for the Y-axis assembly. They had been cut by water-jet. The holes and threads need to be machined.

• 3 Axis FPGA controller

  Rafael Serrano • 12/03/2016 at 18:48 • 0 comments

  At the moment I have finished the prototype 3-axis motion controller with a DE0-Nano board. The simulation was performed with Verilator, and the synthesis and programming with Quartus-II v13.1.
  The model is written in system verilog. It includes several modules, the most important of which SCurveGenerator, LinearMotion and ALU, with a Look-Ahead carry.
  

  The system generates the STP and DIR signals for three step motor controllers. As parameters requires JERK, and the definition of S ramp. The process starts when receiving the GO signal.

  I forgot to mention that the number of axes can be configured using the NUM_AXIS parameter from 2 to 16

  
  Soon more and better

• AxVision: Vision experiments (2)

  Rafael Serrano • 10/16/2016 at 12:12 • 0 comments

  Et voila!
  

  Edge detection on a clear black & white image, using an "USB microscope cam".
  

  Next:
  

  • Detection of rectangles (Components) and circles (Fiducials).
  • Compute centroid.
  • Compute angle deviation for rectangles.
  • Make real scale grid for calibration.

  Brainstorm:

  • Test type of ilumination (Red leds or white leds). Actually the microscope use 3 white leds.
  • Use hardware system FPGA+CAM (DE0 Nano) or software system (OpenMV) as an independent detection module. Expensive but beautifull.

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