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Messages - Jan Mozol

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31
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 12, 2016, 06:50:10 PM »
Please understand I am very new in this kind of problem.I buy this driver:TB6560 3A CNC Router Single 1 Axis Controller Stepper Motor Driver Module; from ebay and I dont know what type of magnet to buy?!I  want to use Mach3, impact&laser engraver .
Where have to wiring the driver? On breakoutboard?Please help me! but in slow motion!
I recomend you to follow the post since the begining , and watch over the links everybody placed , to help you imagine two  magnet fixed on aluminium side by side repelling themselves and this coil in the middle, the coil is in a lever and the lever allows movement of about 10 mm up and down , that is the impacter.
The magnet shoul be neodymium , at least 5000 gauss and a good mass , these in attach would be ideal.The second one is 10x10 mm 5600 gaus , i use 2 of them one in front of the other repelling
I based my coil on this one attached , i unwired it and did it very narrow ,10 mm

32
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 12, 2016, 06:41:43 PM »
If you use the tb6560 is just the same.
Just put the 5 vcc+ to clk+ and cw+ and digital trigger to both clk- and cw-. then put dc+and dc- to =24 and gnd , the coil of impacter should be connected to a+ and b+ from one side and a- and b- to the other.
Unhapilly I made my coil and assembled the magnets manually.i just gave 96 rounds of 26 awg copper wire around a round piece of mild steel (high carbon) of 10 mm ( a slice)  and i use resin to envelope the coil, it has 10 mm width and 25 mm overall.

33
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 12, 2016, 06:30:49 PM »
See this scheme , maybe will help you.
Yes...it is paint ,lol.

34
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 12, 2016, 06:09:07 PM »
Hi, it will depend of what kind of hardware you are using, the best I could achieve was using a l298 and a dc-dc step down.
The thing is that the digital trigger from Mach3 must be conected together in step and dir of the l298.
don´t worry about english, I'm from Brasil and my english is terrible!
I am now triyng to find a different approach , instead of just using digital trigger, i am tryng to combine it with the pwm signal using  the attached software to generate the  g-code,
Give it a try , you can choose between S or Z generation , one will be used on digital trigger the other can be used to engrave slowly and with z .
The soft is in brazillian portuguese

35
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 02, 2016, 04:00:57 PM »
Dan, just take a look at a tatoo drawer, it´s exactly where i took my idea, and afterwards I took of the spring and used magnets. there is a coil(electric) on one end, and is sided by two powerfull neodimium magnets, this gives the movement, in the oher side , before the diamond tip i had a spring, now i have 4 smaller neodimium magnets, that always repels themselves.I pluged the coil in a stepper driver , shutting both a+ and B+ in one side and both a- and b- in the other wire , i shuted (jumped) both dir and step inputs on the s' or digital trigger from the board to the step driver , this will be the same as a laser ttl+ and ttl-.
In the compiling make the signal be more than 90 ms , or you won´t have impact, but a noise.

36
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 02, 2016, 03:52:19 PM »
It is a limit!
I use 1/4 chinese single diamond dresser, it costs about 4 to 5 dollars, i bought ten and with 100% of taxes (i live in Brasil where we are stolen by the government) i spent 100 dollars or 340 reais.
the size is 8 cm x8cm x 8 cm , the lever has 5 cm and power coils about 4 cm , they are round.
In the video you will have more frequency and strength on wich way you make the pics, for example, if you leave it as greyscale you have a slower rate, but best quality, if you make them bitmap , just black and white and dithered you have faster rate and faster frequency, because it will undestand just two positions, ov-white or 24 v black , so you can achieve faster frequency.
Frequency in this case is achieved with 5000 mm/sec on feedrate , so that it will allow the lever to go up and down more times.
You can also refine your images, because you can go up to 300 dpi´s . I will continue to explore the limits and , of course, if limits are best quality.

37
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 02, 2016, 03:30:35 PM »
35 hz shoud be more than enough!
I made today an interface with GRBL and arduino uno 3 , (yes I know this is a mach thread).
I got 5000 mm and 100HZ,in an all neodimium impacter...it went great till now.
An all neodimium means that the lever has two magnets on each side and two more magnets mounted against these two, so the lever floats between those magnets,it´s a great solution for increasing frequency of impact
I also modulated the grayscale on pwm attributing 0- 0-0v-to white and 254-10-24v-to black.
It worked awsome , gona get a pwm for my impact plugin too.

38
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: December 02, 2016, 12:27:13 PM »
about 50 hz.
I guess this is the max frequency I can get.
Although I think 30 hz has a better finish.
I usually leave about 0.3 mm of gap between diamond tip and the material.
It was quite difficult in the begining but now i can get better results.
here Dan !

39
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: November 28, 2016, 06:14:46 PM »
Another example...
This pic was asked by a friend , he seht me the file via whatsapp, low resolution and with a little blur.
In this case i did a lot of photoshop , changed to grayscale and bitmapp, i saved and put to work.see the final ,It is as always barzillian granite called here 'black diamond' .
The pic was taken by my old S3 samsung phone...I can assure that live it is much more nicer!

40
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: November 28, 2016, 05:54:39 PM »
maybe I am misunderstanding since english is not my mother language..
I understand that 1 khz means 1000 cycles ( up and down) of the tip of the tool?
It would only produce - in my machine- a humble and not really impact.
I use black and white , as in a dithering , just like the picture below.
For sure i will go on researching and trying , but it works for me , to each point in the pic it seems that the engraver gives many impacts, it runs away from me how to explain , but I assumed it as frequency ( yes, I know, I suck at the technology)
I just go on until it works!
By the way, thanks Art and Tweakie, it all begin with you and pls forgive-me if i missed someone.

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