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timnoble2
MemberThanks, Alden. That would be massively helpful. I too am looking forward to TGFX’s development. However, for my sort of implementation, coding up something simple by hand is probably better. Specifically, I need to provide museum staff with a simple text interface to run one file or another. Not much is needed except robust communication with TinyG in order to send simple GCode files several thousand lines long. I’ve found several chunks of example code that folks seem to have used, but they vary widely.
Again, thanks for your help. I’ve found the hardware to work very well and look forward to working with it for a long time to come.
Member<<pfft.. who needs a computer.. (assuming you have a tablet)>>
well, i don’t. so, that’s unfortunately not an option.
MemberI haven’t had a chance to remove the wireless radios and TinyG and test them elsewhere. Due to the deadlines I’m under with this piece, all the rewiring involved will have to wait until I’m at the museum and setting it up for real. At that point, however, I will give Xbee serial control another try and report back. In the meantime, I’m fighting with controlling the machine from a linux computer, which may end up in another forum thread soon too, since it’s not going as smoothly as I’d like. Thanks for the interest and helpful suggestions, all!
MemberThanks for your help and advice. This certainly helps me narrow the causes of my communication issues. One variable that I just realized may be in play is copious electromagnetic interference from the massive power substation across the street from my studio. There’s an ever-present audio hum in the air, so it stands to reason that the RF spectrum is a mess too.
Another possible cause for the weirdness with XBee is a mismatch of clock rates according to this post at Digi (makers of the XBee):
http://www.digi.com/support/forum/4787/using-the-xbee-at-115-200-baud-updated-16-march-2010
A baudrate of 9600 is pretty standard for a lot of xbee projects. If I were to change over to 9600, are there any concerns that this brings up for tinyG? is it perhaps too slow? For the purposes of my machine, I don’t expect to be passing data back and forth very quickly or all that often, but I’d be interested in hearing about any unintended consequences this may create.
Thanks again!
Memberafter a bit more testing, i can report that it does work to attach an XBee to tinyG. However, i am experiencing a few issues with smooth communication. One is that at the high baudrate which tinyG defaults to (115200), I don’t seem to receive all of the response from the usual “$$” query. Instead, I get most of it, but lots is lost in the process. I went ahead and reduced the baudrate on both XBees and the tinyG to 38400 and I found that I got more of the expected response, but still experienced choppiness and lost characters. Pasted below is the result.
I’m open to suggestions as to what is causing this. Next step will be to reduce the baudrate further all around and see if that makes the communicaiton more reliable. Can anyone see potential drawbacks to this? Are there perhaps persuasive reasons not to? Was 115200 chosen for a particular reason?
Also, and this is vexing, I cannot seem to retain my changes to tinyG’s baudrate. On reset, it reverts to 115200. Is there something I’m missing to “burn” the setting into memory?
Thanks!
[fb] firmware build 380.08 [fv] firmware version 0.96 [hv] hardware version 8.00 [id] TinyG ID 1H4973-DSU [ja] junction acceleration 100000 mm [ct] chordal tolerance 0.001 mm [st] switch type 0 [0=NO,1=NC] [mt] motor disble timeout 60 Sec [ej] enable json mode 0 [0=text,1=JSON] [jv] json verbosity 4 [0=silent,1=footer,2=messages,3=configs,4=linenum,5=verbose] [tv] text verbosity 1 [0=silent,1=verbose] [qv] queue report verbosity 0 [0=off,1=filtered,2=verbose] [sv] status report verbosity 1 [0=off,1=filtered,2=verbose] [si] status interval 250 ms [ic] ignore CR or LF on RX 0 [0=off,1=CR,2=LF] [ec] expand LF to CRLF on TX 0 [0=off,1=on] [ee] enable echo 0 [0=off,1=on] [ex] enable flow control 1 [0=off,1=XON/XOFF, 2=RTS/CTS] [baud] USB baud rate 3 [1=9600,2=19200,3=38400,4=57600,5=115200,6=230400] [gpl] default gcode plane 0 [0=G17,1=G18,2=G19] [gun] default gcode units mode 1 [0=G20,1=G21] [gco] default gcode coord system 1 [1-6 (G54-G59)] [gpa] default gcode path control 2 [0=G61,1=G61.1,2=G64] [gdi] default gcode distance mode 0 [0=G90,1=G91] [1ma] m1 map to axis 0 [0=X,1=Y,2=Z...] [1sa] m1 step angle 1.800 deg [1tr] m1 travel per revolution 40.900 mm [1mi] m1 microsteps 8 [1,2,4,8] [1po] m1 polarity 1 [0=normal,1=reverse] [1pm] m1 power management 1 [0=remain powered,1=shut off when idle] [2ma] m2 map to axis 0 [0=X,1=Y,2=Z...] [2sa] m2 step angle 1.800 deg [2tr] m2 travel per revolution 40.900 mm [2mi] m2 microsteps 8 [1,2,4,8] [2po] m2 polarity 1 [0=normal,1=reverse] [2pm] m2 power management 1 [0=remain powered,1=shut off when idle] [3ma] m3 map to axis 1 [0=X,1=Y,2=Z...] [3sa] m3 step angle 1.800 deg [3tr] m3 travel per revolution 11.000 mm [3mi] m3 microsteps 8 [1,2,4,8] [3po] m3 polarity 0 [0=normal,1=reverse] [3pm] m3 power management 1 [0=remain powered,1=shut off when idle] [4ma] m4 map to axis 2 [0=X,1=Y,2=Z...] [4sa] m4 step angle 1.800 deg [4tr] m4 travel per revolution 2.000 mm [4mi] m4 microsteps 8 [1,2,4,8] [4po] m4 polarity 0 [0=normal,1=reverse] [4pm] m4 power management 1 [0=remain powered,1=shut off when idle] [xam] x axis mode 1 [standard] [xvm] x velocity maximum 600.000 mm/min [xfr] x feedrate maximum 600.000 mm/min [xtm] x travel maximum 150.000 mm [xjm] x jerk maximum 20000000 mm/min^3 [xjh] x jerkhoming 20000000 mm/min^3 [xjd] x junction deviation 0.0500 mm (larger [xsn] x switch min 1 [0=off,1=homing,2=limit,3=limit+homing] [xsx] xx 0 [0=off,1=homing,2=limit,3=limit+homing] [xsv] x search velocity .000 mm/min [xlv] x latch velocity 100.000 mm/min [xlb] x latch backoff 2.000 mm [xzb] x zero backoff 1.000 mm [yam] y axis mode andard] [yvm] y velocity maximum 600.000 mm/min [yfr] y feedrate maximum m/min [ytm] y travel maximum 150.000 mm [yjm] y jerk maximum 200000003 [yjh] y jerk homing 20000000 mm/min^3 [yjd] y junction deviation 0.0500 mm (larger is faster) [ysn] y switch min 1 [0=off,1=homing,2=limi+homing] [ysx] y switch max 0 [0=off,1=homing,2=limit,3=limit+homing] search velocity 500.000 mm/min [ylv] y latch velocity 100.000 mm/m[ylb] y latch backoff 2.000 mm [yzb] y zero backoff 1.000 mm [zam] z axis mode 1 [standard] [zvm] z velocity maximum 600m/min [zfr] z feedrate maximum 600.000 mm/min [ztm] z travel maximum 00 mm [zjm] z jerk maximum 20000000 mm/min^3 [zjh] z jerk homing 200000in^3 [zjd] z junction deviation 0.0500 mm (larger is faster) [zsn] z switch m 0 [0=off,1=homing,2=limit,3=limit+homing] [zsx] z switch max ,1=homing,2=limit,3=limit+homing] [zsv] z search velocity 400.000 mm/min [zlatch velocity 100.000 mm/min [zlb] z latch backoff 2.000 mm [zzz zero backoff 1.000 mm [aam] a axis mode 3 [radius] [alocity maximum 172800.000 deg/min [afr] a feedrate maximum 172800.000 deg/mitravel maximum -1.000 deg [ajm] a jerk maximum 5760000000 deg/min^3 [a jerk homing 5760000000 mm/min^3 [ajd] a junction deviation 0.0500 deg ( faster) [ara] a radius value 0.1989 deg [asn] a switch min [0=off,1=homing,2=limit,3=limit+homing] [asx] a switch max 0 [0=off,1=limit,3=limit+homing] [asv] a search velocity 600.000 deg/min [alv] a latchocity 100.000 deg/min [alb] a latch backoff 5.000 deg [azb] a zckoff 2.000 deg [bam] b axis mode 0 [disabled] [bvm] b city maximum 3600.000 deg/min [bfr] b feedrate maximum 3600.000 deg/min b travel maximum -1.000 deg [bjm] b jerk maximum 20000000 deg/min^3 junction deviation 0.0500 deg (larger is faster) [bra] b radius value 1.0000 deg [cam] c axis mode 0 [disabled] [cvm] c velocity maxi 3600.000 deg/min [cfr] c feedrate maximum 3600.000 deg/min [ctm] c travel ma -1.000 deg [cjm] c jerk maximum 20000000 deg/min^3 [cjd] c junction devian 0.0500 deg (larger is faster) [cra] c radius value 1.0000 deg [p1frq] pwm frequency 100.000 Hz [p1csl] pwm cw speed lo 1000.000 R[p1csh] pwm cw speed hi 2000.000 RPM [p1cpl] pwm cw phase lo 0.125 1] [p1cph] pwm cw phase hi 0.200 [0..1] [p1wsl] pwm ccw speed lo 100M [p1wsh] pwm ccw speed hi 2000.000 RPM [p1wpl] pwm ccw phase lo 0.125 [0..1] [p1wph] pwm ccw phase hi 0.200 [0..1] [p1pof] pwm phase off 0.100 [0..1] [g54x] g54 x offset 0.000 mm [g54y] g54 y offset 0.000 mm [g54z] g54 z offset 0.000 mm [g54a] g54 a offset 0.000 deg [g54b] g54 b offset 0.000 deg [g54c] g54 c offset 0.000 deg [g55x] g55 x offset 75.000 mm [g55y] g55 y offset 75.000 mm [g55z] g55 z offset 0.000 mm [g55a] g55 a offset g [g55b] g55 b offset 0.000 deg [g55c] g55 c offset 0.00g [g56x] g56 x offset 0.000 mm [g56y] g56 y offset 0.000 mm [g56z] g56 z offset 0.000 mm [g56a] g56 a offset 0.0] g56 b offset 0.000 deg [g56c] g56 c offset 0.000 deg [g57x] g57 x offset 0.000 mm [g57y] g57 y offset 0.000 mm g57 z offset 0.000 mm [g57a] g57 a offset 0.000 deg [g5g57 b offset 0.000 deg [g57c] g57 c offset 0.000 deg [g5 offset 0.000 mm [g58y] g58 y offset 0.000 mm [g58z] g58ffset 0.000 mm [g58a] g58 a offset 0.000 deg [g58b] g58 offset 0.000 deg [g58c] g58 c offset 0.000 deg [g59x] g5x offset 0.000 mm [g59y] g59 y offset 0.000 mm [g59z] g5 0.000 mm [g59a] g59 a offset 0.000 deg [g59b] g59 b off 0.000 deg [g59c] g59 c offset 0.000 deg [g92x] g92 x off 0.000 mm [g92y] g92 y offset 0.000 mm [g92z] g92 z offset 0.000 mm [g92a] g92 a offset 0.000 deg [g92b] g92 b offse 0.000 deg [g92c] g92 c offset 0.000 deg [g28x] g28 x location 0.000 mm [g28y] g28 y location 0.000 mm [g28z] g28 z location 0.000 mm [g28a] g28 a location 0.000 deg [g28b] g28 b ion 0.000 deg [g28c] g28 c location 0.000 deg [g30x] g30 x lion 0.000 mm [g30y] g30 y location 0.000 mm [g30z] g30 z loc 0.000 mm [g30a] g30 a location 0.000 deg [g30b] g30 b locati 0.000 deg [g30c] g30 c location 0.000 deg tinyg [mm] ok> -
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