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something basic that I don't understand....

From the original Synthetos forum (2011–2025)

Started by mristau on in TinyG Support. 7 replies, last activity Sep 7, 2015.

mristau #

Not sure why I’m having to reset controller and re-Home between each job file.

(power up machine)
g28.2 x0y0z0 (home)
G28.1 (set G28)

(position to new zero and set)
G92X0Y0Z0

a Vectric/Cut2D job file

G90
G17
G20
G64
G0Z0.5010
G0X0.0000Y0.0000
M3 S18000
G0X0.0000Y0.0000Z0.5000
G1Z-0.0625F10.0
G1Y11.0000F20.0
X11.0000
Y0.0000
X0.0000
G1Z-0.1250F10.0
G1Y11.0000F20.0

(etc.....)

X0.1524Y10.8701
X0.1476Y10.8637
X0.1423Y10.8577
G0Z0.5000
G0Z0.5010
G0X0.0000Y0.0000
M30

    If I were to re-run the same job file, machine moves to unexpected position.

    I’ve posted my controller settings:
    https://dl.dropboxusercontent.com/u/71119386/SettingsReport.txt

cmcgrath5035Staff #

The values of $nPM look strange, lots of =0, ?

You firmware is way out of date, current Master has been quite stable - fw=440.18.

I think your parameters are OK, with exception of $nPM, but power management did not work well back at 435.10.
You may be losing your zero position as the job runs.

After running the job one, enter a G1 X0Y0Z0,
does machine move back to your zero point?

PS
Please report settings in mm.
Best to enter parameters in mm as well, then w=switch to inch if you must.
There are many inch related bugs in old fw.

mristau #

Thanks again.

(After running the job one, enter a G1 X0Y0Z0, does machine move back to your zero point?)

It returns to G28... Not the zero point set via G92.

cmcgrath5035Staff #

Discussion would be a whole lot easier if G code had line numbers.

Your posted parameters show all G92 offsets =0
I guess you snapshot that before your G92?

At any rate, you may have stumbled on a bug that was found and fixed between FW 440.14 and 440.16.
Other fixes were added and FW440.18 made Master.

Upgrade your FW and try again.

mristau #

Have upgraded firmware but still unable to run a series of jobs without re-setting board, re-homing and re-G92ing. If I run a Vectric cut2d file twice, on second run z axis moves up until trips limit switch.

G90
G17
G20
G64
G0Z0.5010
G0X0.0000Y0.0000
M3 S18000
G0X5.1247Y3.1676Z0.5000
G1Z-0.0625F10.0
G1X5.1399Y3.1467F20.0
X5.1512Y3.1394
-------------
Etc.
-------------
G2X4.9541Y1.6791I0.2011J0.1703
G2X4.9218Y1.7697I0.4751J0.2203
G1X4.9123Y1.8096
X4.8714Y1.9615
G3X4.7647Y2.2173I-1.5145J-0.4813
G3X4.4715Y2.5860I-1.1083J-0.5804
G0Z0.5000
G0Z0.5010
G0X0.0000Y0.0000
M30

cmcgrath5035Staff #

So you are running FW 440.18 or FW 440.19?
Sending Gcode from CoolTerm or from Chilipeppr; if CP, what SPJS version?

mristau #

CoolTerm, FW is 440.18

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