This topic contains 166 replies, has 14 voices, and was last updated by 
Eruheran 2 months, 1 week ago.
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The value is steps/unit and James used 1/10rad for his unit, at some point. I’m pretty sure that’s where that came from. The 103 doesn’t match with the E3600, so that’s a mistake in the TV page.
At least the stepper is stopping, so you can measure it. Something is still not making sense. Try the M92 command to change it:
http://marlinfw.org/docs/gcode/M092.html
You can retrieve the current setting with M503 and you can save them to eeprom with M500 (which isn’t needed for testing, just for power cycle).
So I would try:
G90
G1 E1.0 F30
M92 E8.88
G1 E2.0 F30That should try your current setting and then change it and try the second one (the second one should be incredibly small).
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Hey, back from holidays.
I have just double checked also my eeprom setting, and I have 102.4 steps/mm for E, and G1 E360 does one full turn…honest. I can’t explain it.
I agree with the formula of 200 * steps / 360 in theory. I checked the spec of my E stepper: also 200 steps per revolution. I don’t think I changed anything in the firmware other than the two lines you have to comment, but it really shouldn’t matter if I had. Should be able to control this from eeprom and the driver jumpers only. I have also checked the driver jumpers on mine. DRV8825 with all jumpers, so 1/32 stepping.
Maybe in Maong’s case the firmware is not responding to the changes of E steps/mm in configuration.h, because it’s reading the value from eeprom. I always make changes in eeprom. Either gcode or Alt+E in Repetier host. Did you try Jeff’s suggestion? I’m guessing if you start with an M500 it will show that the steps/mm for E is not what you are setting.
I have just double checked also my eeprom setting, and I have 102.4 steps/mm for E, and G1 E360 does one full turn…honest. I can’t explain it.
What!?! That’s off by about a factor of 6 (5.76). This is very strange. Where could we be making a 6x mistake? 2pi? Sqrt(36)? This is going to bother me all day…
Is it because it’s the extruder? Do you have some flow rate set?
Ho messo 3 ponticelli e 32 gradini ..
Ho eseguito il comando
G90
G1 E1.0 F30
M92 E8.88
G1 E2.0 F30M503
M500
Esegue i comandi lentamente ma non corrispondono
Ho provato di tutto
mia configurazione.h:
when I try to do ALT + E, an extruder does not appear on repetier host….
Attachments:
What do you mean, they do not match? How much did it move the first move and the second move? Each move should take two seconds.
What do you mean, they do not match? How much did it move the first move and the second move? Each move should take two seconds.
I did your test….
in both cases they stop at the same point..every move requires a lot more than two seconds…
surely there is some setting in the firmware to be fixed
The DEFAULT_MAX_FEEDRATE is set to 1 deg/sec, that’s not very high. Maybe set that to 90. The acceleration is enormous, maybe set that to 180.
The F30 should be 30degrees/min, and it’s trying to move only one degree, so that should be 2 seconds. Something is wrong.
It’s very hard to debug from here. The configuration.h is very long… You haven’t told me how long it takes, how far it goes, or wether changing the setting in the middle makes any difference.
thank you tomorrow I try how you say … even if I did not understand the importance of the DEFAULT_MAX_FEEDRATE …
I finally got around to uploading my remix of this to fit the Bosch Quick Release mount. It can be found here: https://www.thingiverse.com/thing:2750328
I will not be able to actually test this until we get warmer weather.
hello, they could make compatible the, Gcodetools for repetier. Thank you .Hi, I need to cut shaped parts out of 5mm coroplast (corflute) and tried with a router bit but it just melts. It looks like this Tangential Cutter is what I need. I have read all post twice in this thread and while I can follow along with all the hardware I am not following how to generate the gcode. I use Estlcam and Illustrator to generate my gcode currently for the mpcnc.
Is there a step by step guide anywhere how to generate the gcode for the Tangential Cutter ?
Thanks guys, great work.
As above, I’m hoping to bump this thread for information. I’m working on making an mpcnc fabric cutter, and this tangential cutter is exactly what I need. Any write-up available? Did it ever get worked out on the software side to a reliable g-code generation work-flow, do I need to update firmware? All that good stuff…
Thanks in advance!
Just following up. I’ve built my whole machine, followed all of the instructions on the thingiverse explanation, installed the modified g-code tools dev in inkscape, set my e-steps appropriately but I simply cannot get this thing to generate useable G-code! It keeps doing crazy things like:
G01 E225.000000 F4000 (Turn knife 225.0 degrees)
G01 E236.250000 F4000 (Turn knife 236.25 degrees)
G01 X4.350758 Y14.767980 Z-1.000000 F900.000000
G01 E247.500000 F4000 (Turn knife 247.5 degrees)
G01 E258.750000 F4000 (Turn knife 258.75 degrees)Hi,
I’ve been away from the workshop for a few months, but happy to try to help you get to where I got to. Would be interested to learn how the solution can cope with other materials.
I hope that this week I can find time to dust off the software and hardware so I can re-engage. I’m pretty sure we can get you generating gcode.
Cheers,
James
Thanks Sir for the model and design. Do you know if this is compatible with the RepRap Rambo Mini ?
Thanks 🙂
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