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Hi<br>
<br>
I am not sure whether you have already bought the hardware and now
want to know what to do with it, or if it is the proposed hardware.<br>
<br>
If you buy a Mesa 5i25 or similar, you can run up to 10 steppers
from a proper computer using step/dir signals and get an industrial
standard board with<br>
lots of I/O.<br>
<br>
USB is useless for any form of realtime system, there is no
guaranteed latency.<br>
(if you look it up on the linuxcnc forum there are whole threads
explaining why)<br>
<br>
CanOpen and RS232 are not supported natively by machinekit and are
not for the faint hearted or beginners.<br>
<br>
I personally would not touch Pololu stepper drivers or similar
clones and these seem to have plenty of extra 'froth' you don't
need.<br>
They are not even cheap at £31.95.<br>
<br>
I would go for properly heat sunk Leadshine variety drivers that
exceed the max rating of the steppers and will give you<br>
years of trouble free service.<br>
You can for instance, get DM542's (50v 4.2A) for about £17 in UK and
even less if you buy direct from China.<br>
<br>
I won't even comment upon whether it is possible or in any way
desirable to run 8 steppers off a BBB.<br>
<br>
Just my opinions in part, but I build CNC machines that just work.
<br>
I have used other cheaper components in the early days and always
found them a false economy and troublesome in the long run.<br>
<br>
regards<br>
<br>
<div class="moz-cite-prefix">On 26/09/18 08:37, Lewis miles wrote:<br>
</div>
<blockquote
cite="mid:b2f5d590-c95e-4ce1-9de4-***@googlegroups.com"
type="cite">
<div>Hi,<br>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"><br>
</span></span></p>
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">I am new to </span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">MachineKit</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> and </span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">LinuxCNC</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">, </span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">I am looking to control
a machine which has 8 axes (for a 3D printer). I am </span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">struggling</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> to find information
about how I can interface with the variety of motors that
will be used in the machine, and whether I should use a
BBB cape or PC with MESA board.</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">The</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> motors to be
controlled are Brushless Maxon Motors Controlled by Maxon
EPOS4 controllers (which can interface through RS232, USB
2.0, </span><span class="SpellingError SCXO67875394"
style="background-color: inherit;">CanOpen </span></span><span
style="color: windowtext; font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height:
18px;" class="TextRun SCXO67875394" lang="EN-US"><span
class="SpellingError SCXO67875394"
style="background-color: inherit;"><span style="color:
windowtext; font-size: 11pt; font-family: Calibri,
Calibri_MSFontService, sans-serif; line-height: 18px;"
class="TextRun SCXO67875394" lang="EN-US"><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">and accept position
or velocity or step/direction commands</span></span></span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">) </span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">Dynamixel</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> actuators (which can
interface through USB or RS485 and accept position or
velocity commands) and Stepper motor driver (Step/</span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">dir</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> or USB).</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">I would really
appreciate any advice on whether these types of hardware
interfaces may work with </span><span
class="SpellingError SCXO67875394"
style="background-color: inherit;">machinekit</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">/HAL and whether they
have been done before. If all my motor controller can be
controlled via USB 2.0 could an AMD64 be used without a
MESA board? Or if you have any other </span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">thoughts</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> about what boards to
use that would be great.</span></span><span class="EOP
SCXO67875394" style="font-size: 11pt; line-height: 18px;
font-family: Calibri, Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">Maxon EPOS4:</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun EmptyTextRun
SCXO67875394"></span><a moz-do-not-send="true"
class="Hyperlink SCXO67875394"
href="https://www.maxonmotor.com.au/medias/sys_master/root/8827037548574/17-EN-439-440-442..pdf"
target="_blank" rel="noreferrer"><span style="font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun
SCXO67875394" lang="EN-US"><span class="NormalTextRun
SCXO67875394" style="background-color: inherit;">https://www.maxonmotor.com.au/medias/sys_master/root/8827037548574/17-EN-439-440-442..pdf</span></span></a><span
style="color: windowtext; font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height:
18px;" class="TextRun EmptyTextRun SCXO67875394"></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="SpellingError SCXO67875394"
style="background-color: inherit;">Dynamixel</span><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;"> XM430-350R</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun EmptyTextRun
SCXO67875394"></span><a moz-do-not-send="true"
class="Hyperlink SCXO67875394"
href="http://www.robotis.us/dynamixel-xm430-w350-r/"
target="_blank" rel="noreferrer"><span style="font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun
SCXO67875394" lang="EN-US"><span class="NormalTextRun
SCXO67875394" style="background-color: inherit;">http://www.robotis.us/dynamixel-xm430-w350-r/</span></span></a><span
style="color: windowtext; font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height:
18px;" class="TextRun EmptyTextRun SCXO67875394"></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">Stepper Driver:</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun EmptyTextRun
SCXO67875394"></span><a moz-do-not-send="true"
class="Hyperlink SCXO67875394"
href="https://www.pololu.com/product/3131" target="_blank"
rel="noreferrer"><span style="font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height:
18px;" class="TextRun SCXO67875394" lang="EN-US"><span
class="NormalTextRun SCXO67875394"
style="background-color: inherit;">https://www.pololu.com/product/3131</span></span></a><span
style="color: windowtext; font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height:
18px;" class="TextRun EmptyTextRun SCXO67875394"></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;">Cheers,</span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"></span></p>
</div>
<div class="OutlineElement Ltr SCXO67875394" style="margin-left:
0px; direction: ltr;">
<p class="Paragraph SCXO67875394" style="font-weight: normal;
font-style: normal; vertical-align: baseline;
background-color: transparent; color: windowtext; text-align:
left;" lang="EN-US"><span style="color: windowtext; font-size:
11pt; font-family: Calibri, Calibri_MSFontService,
sans-serif; line-height: 18px;" class="TextRun SCXO67875394"
lang="EN-US"><span class="NormalTextRun SCXO67875394"
style="background-color: inherit;"></span></span><span
class="EOP SCXO67875394" style="font-size: 11pt;
line-height: 18px; font-family: Calibri,
Calibri_MSFontService, sans-serif;"> </span></p>
</div>
<span style="color: windowtext; font-size: 11pt; font-family:
Calibri, Calibri_MSFontService, sans-serif; line-height: 18px;"
class="TextRun SCXO67875394" lang="EN-US"><span
class="NormalTextRun SCXO67875394" style="background-color:
inherit;">Lewis</span></span>
-- <br>
website: <a moz-do-not-send="true"
href="http://www.machinekit.io">http://www.machinekit.io</a>
blog: <a moz-do-not-send="true" href="http://blog.machinekit.io">http://blog.machinekit.io</a>
github: <a moz-do-not-send="true"
href="https://github.com/machinekit">https://github.com/machinekit</a><br>
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