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rostock max z axis homing help
Posted: Mon Mar 04, 2013 3:19 pm
by michaels
I have read a lot of things on the forum and it get very confusing. thank you for help in advance
I get about 1 inch away from the heated bed and it will not go down any more. I have read the pdf and i dont understand where to go and change the default by 10 for the Rostock MAX is 345.0
I have heated everything up to temp bed at 70 and hot end at 230...still same issue the same about 1 inch way from the bed.
the rambo board cam installed with software on it already.
Mike
Re: rostock max z axis homing help
Posted: Mon Mar 04, 2013 3:54 pm
by mhackney
You need to increase the max travel/Z in your firmware - which I am guessing is Marlin. I think this is it:
Code: Select all
#define min_software_endstops true //If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true //If true, axis won't move to coordinates greater than the defined lengths below.
// Travel limits after homing
#define X_MAX_POS 205
#define X_MIN_POS 0
#define Y_MAX_POS 205
#define Y_MIN_POS 0
#define Z_MAX_POS 200
#define Z_MIN_POS 0
#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)
Re: rostock max z axis homing help
Posted: Mon Mar 04, 2013 11:13 pm
by michaels
thank you for the info...sorry to ask but what do i use to do this....I have the printer connected via usb cable. how can i read the firmware to make the changes.
thanks
Re: rostock max z axis homing help
Posted: Tue Mar 05, 2013 7:39 am
by mhackney
You need to have the Arduino IDE setup to edit firmware and then load that firmware to your printer. See this thread where I walked another user through the process:
http://forum.seemecnc.com/viewtopic.php?f=2&t=1177
There is also information in geneb's Assembly Manual - a must read.
cheers,
Michael
Re: rostock max z axis homing help
Posted: Tue Mar 05, 2013 11:59 pm
by michaels
thank for the help was able to program and get that part working...have a question about the test print from the pdf...I am got the cube file and put the settings in the slic3r and feed filament though the hot end and this worked but now went i goto print the job the filament run back up in the tube.....i dont understand why when i hit the feed up arrow it goes in the right direction. any ideas
thanks
Re: rostock max z axis homing help
Posted: Wed Mar 06, 2013 8:05 am
by mhackney
michaels, I'm having a little trouble deciphering your post. Are you saying that you load the test cube to print, then you manually feed the filament using the buttons on the software and it extrudes fine but then when you press Print, the filament actually backs up the Bowden tube?
What host and operating system are you running, what firmware are you running?
Re: rostock max z axis homing help
Posted: Wed Mar 06, 2013 8:14 am
by dbarrans
I had the same problem the first time I tried to print. I fixed it by reversing the E stepper direction in the Marlin firmware.
I think the down arrow is extrude, and the up arrow is retract, isn't it?
- dan
Re: rostock max z axis homing help
Posted: Wed Mar 06, 2013 8:24 am
by mhackney
Dan, it depends on the host. The Mac Repetier host has clearly labeled buttons called Extrude/Extract, no arrows! That's why I asked what host he's using. I suspect the E direction too but his comment about feeding filament through the hot end needs clarification to know for sure.
cheers,
Michael
Re: rostock max z axis homing help
Posted: Wed Mar 06, 2013 12:33 pm
by michaels
Sorry about no being clear..yes i load the test cube, then i feed the filament into the tube. use the up arrow on the Repetier-Host and it feeds though and starts to come out like the pdf states. after doing that i now click on print and its at that point the filament backs up.
im using Repetier-Host with the johnoly99/Marlin-for-rostockmax-rambo firmware and it is on a windows 7 64 bit laptop with 8 Gigs of Mem.
Re: rostock max z axis homing help
Posted: Wed Mar 06, 2013 1:04 pm
by mhackney
Thanks.
[img]
http://www.repetier.com/w/wp-content/up ... lpanel.png[/img]
The "up" arrow is retract! So, dbarran's suggestion to reverse the E stepper direction is probably your solution.
Re: rostock max z axis homing help
Posted: Thu Mar 07, 2013 10:39 pm
by dbarrans
Yeah, I thought that was backwards too. I just need to remember the arrows mean the direction at the hot end (the thing that squirts hot plastic), not the direction at the extruder (the thing that pushes cold plastic).
Isn't ambiguity fun?
- dan