Mesa 7i96 Ethernet board

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18 Mar 2019 22:55 - 18 Mar 2019 22:57 #128939 by microsprintbuilder
I'm not sure what the max hertz will be just yet. My design is not my own but taken directly from a service manual of a wire edm. Also I have the manual from the Sodlick edm I'm retrofitting and reverse engineered the spark box to some extent. When I bought the machine the control did not work, but it was complete. It would seem to me that using pwm would be great for a foam cutter.(variable voltage) but not very good for creating high frequency sparks needed for wire edm. And yes you also need to control one time (dwell) as well as speed. I thought step pulse was a good fit. The primitive spark boxes use a 555 timer. I was just kicking it up a notch to have it on the gui with everything else.
Last edit: 18 Mar 2019 22:57 by microsprintbuilder.

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18 Mar 2019 23:13 #128942 by microsprintbuilder
Here are some of the design files for you to look at.
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The following user(s) said Thank You: tommylight

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18 Mar 2019 23:17 - 18 Mar 2019 23:20 #128944 by microsprintbuilder
The mossfet I'm using. oh and having a opinion about something you have never done just makes you a critic.
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Last edit: 18 Mar 2019 23:20 by microsprintbuilder.

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18 Mar 2019 23:25 #128948 by tommylight
Replied by tommylight on topic Mesa 7i96 Ethernet board
That is a very old way of doing things at a time when the mosfet was very expensive and hard to find and weak.
Today all you need for that ( much much better than that ) is a single mosfet and a PWM signal.
There are even TTL level mosfets so you can drive them directly from the mesa card, but not advisable at all for this use case.
Adding an opto coupler would do the job nicely .

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18 Mar 2019 23:28 - 18 Mar 2019 23:29 #128949 by microsprintbuilder
obviously you don't get that having multiple mossfets allows you to control the amperage. Here again you have never done this.
Last edit: 18 Mar 2019 23:29 by microsprintbuilder.

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19 Mar 2019 00:59 #128954 by tommylight
Replied by tommylight on topic Mesa 7i96 Ethernet board
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11 Apr 2019 14:27 - 11 Apr 2019 14:33 #130664 by hottabich
Replied by hottabich on topic Mesa 7i96 Ethernet board
Hello! Help configure the Spindle and Output section (spindle on) in the 7i96 Configuration Tool. Firmware 4 Step Gens and PWM. Spindle open loop 2.2kw. 400Hz.-24000Rpm. If you can correct my files. Thank!

File Attachment:

File Name: linux_mesa7i96.hal
File Size:7 KB

File Attachment:

File Name: linux_mesa7i96.ini
File Size:4 KB
Attachments:
Last edit: 11 Apr 2019 14:33 by hottabich.

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11 Apr 2019 14:40 #130665 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
Recent versions of master support multiple spindles so the spindle related pin names have changed, I believe what you want is:

spindle.0.on

("man motion" for all the new names)

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11 Apr 2019 15:08 #130669 by hottabich
Replied by hottabich on topic Mesa 7i96 Ethernet board
I use the last master. I want the LED on the corresponding spindle to start up when the spindle starts up, as for a spindle cooling pump. What do I need to fix for this and where?

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11 Apr 2019 18:39 #130682 by hottabich
Replied by hottabich on topic Mesa 7i96 Ethernet board
Thanks for the hint! Understood, should be removed in io.hal before spindle.0.on motion. and one error disappeared as well in the linux_mesa7i96.hal section of the Spindle line setp hm2_7i96.0.pwmgen.00.output-type 0 instead of 0 is one of (1,2,3,4). Thank you so much! Everything worked as desired.

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