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Messages - ahooper

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1
Modbus / Re: Arduino Modbus, Complete, Documented and free
« on: June 18, 2016, 12:38:23 AM »
Awesome job! Just thought i would let you know I got this installed on a Teensy 3.2 and have used the USB for the interface. The goal is to use this as a pendant.

2
General Mach Discussion / CNC Painting Machine/Robot
« on: April 02, 2015, 07:55:33 PM »
Just after some ideas.
What i would like to do is build a system that has an X gantry that attaches to the back end of a robot. When the robot travels forward at a set speed the X axis tracks backward and forward with a paint head or pen and draws line by line on whatever it is on.

The way I see it is there is an encoder on the rear wheels that tracks the Y movement, when Y = the specific trigger point the carriage prints a line on the ground and the pen or pain head fires where required. likely just a solenoid.

The X axis is the easy part however what I am not sure about is the encoder input and how to trigger it at that point.

Any suggestions would be most welcomed.   

I can not sync the forward motion with Mach3 as the controller for the robot has to be independent of Mach3, I can however have a single trigger output to tell the robot to STOP while the line is being printed.

Regards
Andrew

3
Share Your GCode / Re: Christmas Tree - Clear Lexan/Acrylic
« on: October 02, 2009, 05:05:51 AM »
Not a problem, Just don't forget to scale the slot to the thickness of the materiel you are using.

4
Share Your GCode / Re: Christmas Tree - Clear Lexan/Acrylic
« on: October 01, 2009, 07:34:32 PM »
Oh, and please post a picture of whatever you make :)

5
Share Your GCode / Re: Christmas Tree - Clear Lexan/Acrylic
« on: October 01, 2009, 07:34:01 PM »
I sure do, I think this is the one I ended up using but if you have problems let me know and will try and post one of the others. Unfortunately the original artwork is about 10Mb so its not practical to post on the forum.

6
Share Your GCode / Re: Christmas Tree - Clear Lexan/Acrylic
« on: October 01, 2009, 05:38:50 PM »
Thanks Tweakie,

Jeff, I had to improvise on the first one as I did not have anyting small enough to cut with. I used a modified drill bit that I ground down until it was about 1.5mm the sharpend up the flutes. This worked well however snapped off part the way thru cutting the first tree.

The next day the shops were open so I headed down to the suppy company and purchased a 1.2mm end mill and this sucker works well!

I found that by keeping the speed down and using several passes the legan cut reasonably cleanly.

Regards
Andrew

7
Share Your GCode / Re: Christmas Tree - Clear Lexan/Acrylic
« on: September 30, 2009, 07:54:09 PM »
Sorry it has taken so long to get a picture, Kids have been on holiday and have not had the chance.

Here are two photos, The base is hollow and has the green LED's in it with only one currently working however set up this way 2 X AA batteries lasted well over a week running all the time.

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Share Your GCode / Christmas Tree - Clear Lexan/Acrylic
« on: September 26, 2009, 05:30:09 PM »
Well its coming around to that time of the year again, A friend of mine being a graphic artist put together this tree that was originally supposed to be printed on some really thick honeycomb card then cut for a shop display however i managed to get my hands on the artwork and converted it and reduced its size for my home made router.

He has agreed that i can release the GCode obviously provided its not used for commercial gain.

When i get the chance i will take a picture of the one I cut and put together, it sits in a round Oak base and the slots it sits in have some high intensity Green LED's that shine up thou the lexan causing the edges to glow.

Just a word or warning, check the end of the gcode as i'm not sure if it was this version or the previous version that had a little bug that caused the something strange to happen at the last cut.

The tree has been divided into 2 parts mainly because i do not have a tool changer in my machine, 01 is the scroll work on the inside and 02 is the outside profile. I have not added any bridges and most of the cut outs ejected with ease while cutting. I adusted the speed manually so as to get the best effect from the material and reduce any cleanup.

This was the 4th thing ever routed on my router that has been constructed from MDF and threaded rod, the router is a standard wood router that has been stripped back. although the maximium step speed was 450mm/min I was using the Linistepper drives and with a few modifications now have the unit running at around 1100mm/min.



Regards
Andrew Hooper

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