Z max build Height - Please Help pinpoint the config issue.

Talk about modifications to the printer

Z max build Height - Please Help pinpoint the config issue.

Postby xaberx » 2013-Jan-Mon-15-Jan

When I built my printrbot I chose to go with larger rods for Z. The problem I am running into is that my Z build height appears to be limited to roughly 6". I have changed the settings in Prontrface to allow for larger build heights however I still cannot print past this point. Is there a setting I can add to my Gcode to extend the Z build height to the proper size?(im using 32" threaded and smooth rods, though I am only planning on going 24" ). I have measured that the top of the X carriage is exactly 8" from the heat bed when it will not go any further. I believe this to be a setting or configuration issue as my wires are long enough and there is nothing stopping the carriage from moving higher. Please help


Thanks in advance.

Xaberx
  • 0

xaberx
Waiting to connect to printer...
 
Posts: 5
Joined: 2013-Jan-Mon-21-Jan
Reputation: 0

Z max build Height - Please Help pinpoint the config issue.

Sponsor

Sponsor
 

Re: Z max build Height - Please Help pinpoint the config is

Postby artem » 2013-Jan-Mon-16-Jan

Just double checking, did you change it in Slic3r too?
  • 0

User avatar
artem
Waiting for extruder temp...
 
Posts: 93
Joined: 2013-Jan-Fri-08-Jan
Location: Rochester NY
Reputation: 3

Re: Z max build Height - Please Help pinpoint the config is

Postby plexus » 2013-Jan-Mon-16-Jan

Likely, no. The firmware control the min and max. here is the section from the Lincomatic's Marlin fork that is used on the Printrboard:

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 190 //205
#define X_MIN_POS 0
#define Y_MAX_POS 190 //205
#define Y_MIN_POS 0
#define Z_MAX_POS 200
#define Z_MIN_POS 0


I wonder when you buy the Super-Z-Assembly how they get the max Z height higher to use the added mechanical height?
  • 0

User avatar
plexus
Site Admin
 
Posts: 2116
Joined: 2011-Dec-Mon-16-Dec
Location: Toronto, Canada
Reputation: 95

Re: Z max build Height - Please Help pinpoint the config is

Postby extent » 2013-Jan-Tue-01-Jan

M208: set axis max travel

Example: M208 X250 Y210 Z180

The values specified set the software limits for axis travel in the positive direction.

With Marlin firmware, this value can be saved to EEPROM using the M500 command.
  • 0

backer #48
extent
Printing skirt...
 
Posts: 150
Joined: 2012-May-Thu-03-May
Reputation: 6

Re: Z max build Height - Please Help pinpoint the config is

Postby plexus » 2013-Jan-Tue-09-Jan

extent wrote:
M208: set axis max travel
Example: M208 X250 Y210 Z180
The values specified set the software limits for axis travel in the positive direction.
With Marlin firmware, this value can be saved to EEPROM using the M500 command.


Sweet there you go. as long as the M208 values over-ride whats in the firmware you are good to go. i wondered how the super-z-update was managed in the firmware because i doubted PBHQ was going to send a new printrboard. this must be how they do it.
  • 0

User avatar
plexus
Site Admin
 
Posts: 2116
Joined: 2011-Dec-Mon-16-Dec
Location: Toronto, Canada
Reputation: 95

Re: Z max build Height - Please Help pinpoint the config is

Postby Mooselake » 2013-Jan-Wed-20-Jan

plexus wrote:
extent wrote:
M208: set axis max travel
Example: M208 X250 Y210 Z180
The values specified set the software limits for axis travel in the positive direction.
With Marlin firmware, this value can be saved to EEPROM using the M500 command.


Sweet there you go. as long as the M208 values over-ride whats in the firmware you are good to go. i wondered how the super-z-update was managed in the firmware because i doubted PBHQ was going to send a new printrboard. this must be how they do it.

That won't work with Marlin. While the reprap g-code guide on reprap.org lists M208 as set axis max travel, in Marlin M208 has been defined as (copied from the command decode in Marlin_main.cpp, line 1344) as

M208 - set retract recover length S[positive mm surplus to the M207 S*] F[feedrate mm/sec]

AFAIK the only way to change the limits is to recompile (hope I'm wrong...). Maybe Printrbot thought to offer a download of the properly configured firmware somewhere?

Kirk
  • 0

Modified KickStarter Classic Plus 7/2012
KS Thingybot Delta Pro 10/31/16
User avatar
Mooselake
My next printer is...
 
Posts: 3605
Joined: 2011-Dec-Tue-23-Dec
Location: Moose Swamp, Upper Michigan, USA
Reputation: 177

Re: Z max build Height - Please Help pinpoint the config is

Postby scantrontb » 2013-Jan-Fri-22-Jan

because this will be a very important topic once they get the bugs worked out of the super sized mods done over at PBHQ and released to the public, i copied this topic directly over to the "PBHQ>>General" forum so they can get the full thread and answer directly, we can merge the two threads later on once it's been answered....
  • 0

Don't planto mihi adveho illac
PB+ #786
User avatar
scantrontb
Can update firmware
 
Posts: 825
Joined: 2011-Dec-Sun-14-Dec
Location: federal way, wa
Reputation: 5

Re: Z max build Height - Please Help pinpoint the config is

Postby allanonmage » 2013-Feb-Wed-22-Feb

I bought some longer rods at Lowe's to increase the Z height of my Printrbot LC. Any word on if we need to fiddle with firmware? I don't think I'd mind loading firmware, but compiling it seems hardcore...
  • 0

Started with a Printrbot LC Kit; now it's a monster as big as a mid size fridge!
Single ATX Power supply, 650 watts, relay controlled heat bed
extra Z height (3+ ft) via longer rods, but I don't use it. Yet. To reduce wobble, I'm using thing:46082 under the Printrbot.
Dual heated beds, 1 currently working; space for a 3rd
Purple gluestick on glass seems to be sticky enough to get adhesion
FB album with pics: https://www.facebook.com/media/set/?set ... ec287e8726

This was supposed to be a tool, not a series of projects... grrrrr......
User avatar
allanonmage
Layer 100 of 1234
 
Posts: 181
Joined: 2012-Dec-Thu-00-Dec
Reputation: 4

Re: Z max build Height - Please Help pinpoint the config is

Postby lwalkera » 2013-Feb-Thu-01-Feb

I made some changes to Marlin to add in M codes to change the soft limits. For those that know how to compile and load firmware you can grab it here: https://github.com/lwalkera/Marlin/tree/limitsaving For others, I'll try to get a hex file up soon.
  • 0

Laine Walker-Avina
Printrbot Beta-tester and Printrboard Designer
lwalkera
Honeycomb infill 25%...
 
Posts: 291
Joined: 2012-Feb-Sat-04-Feb
Location: Folsom, CA
Reputation: 33

Re: Z max build Height - Please Help pinpoint the config is

Postby allanonmage » 2013-Feb-Thu-07-Feb

That would be great if you could do that, seems this is starting to be a popular mod. With how easy it is, you can see why.
  • 0

Started with a Printrbot LC Kit; now it's a monster as big as a mid size fridge!
Single ATX Power supply, 650 watts, relay controlled heat bed
extra Z height (3+ ft) via longer rods, but I don't use it. Yet. To reduce wobble, I'm using thing:46082 under the Printrbot.
Dual heated beds, 1 currently working; space for a 3rd
Purple gluestick on glass seems to be sticky enough to get adhesion
FB album with pics: https://www.facebook.com/media/set/?set ... ec287e8726

This was supposed to be a tool, not a series of projects... grrrrr......
User avatar
allanonmage
Layer 100 of 1234
 
Posts: 181
Joined: 2012-Dec-Thu-00-Dec
Reputation: 4

Re: Z max build Height - Please Help pinpoint the config is

Postby allanonmage » 2013-Jul-Sat-21-Jul

Any chance that this setting or firmware has been made easy to implement? I just raised the height max on my LC and would like to print taller than 6" at some point.
  • 0

Started with a Printrbot LC Kit; now it's a monster as big as a mid size fridge!
Single ATX Power supply, 650 watts, relay controlled heat bed
extra Z height (3+ ft) via longer rods, but I don't use it. Yet. To reduce wobble, I'm using thing:46082 under the Printrbot.
Dual heated beds, 1 currently working; space for a 3rd
Purple gluestick on glass seems to be sticky enough to get adhesion
FB album with pics: https://www.facebook.com/media/set/?set ... ec287e8726

This was supposed to be a tool, not a series of projects... grrrrr......
User avatar
allanonmage
Layer 100 of 1234
 
Posts: 181
Joined: 2012-Dec-Thu-00-Dec
Reputation: 4

Re: Z max build Height - Please Help pinpoint the config is

Postby elkniwt » 2013-Jul-Sun-15-Jul

Was there any progress on getting a hex file of the modded firmware? I went to some trouble to get an 18-inch(!) X axis on my Printrbot Simple (Beta) and am disappointed to see it only go half way across.
  • 0

elkniwt
Levelling print bed...
 
Posts: 34
Joined: 2013-Jul-Tue-12-Jul
Reputation: 4

Re: Z max build Height - Please Help pinpoint the config is

Postby JonS » 2013-Jul-Mon-14-Jul

I'm trying to extend the z axis on my Jr and there appears to be a 100mm firmware limit. My understanding is that the Jr has slightly different FW, so lwalkera's mod won't work.

lwalkera would you be willing to create a version for the Jr?
  • 0

Printrbot Metal Plus with:

- Dual Ubis 13S metal hot ends (swapped for original Ubis metals)
- Dual Gear Head extruders
- Heated bed
- PEI print bed film

Printrbot Jr (put out to pasture).
User avatar
JonS
ACME leadscrew
 
Posts: 389
Joined: 2013-May-Fri-22-May
Reputation: 20

Re: Z max build Height - Please Help pinpoint the config is

Postby SilverFingers » 2013-Jul-Thu-13-Jul

Has anyone got this working with the JR? I just extended my Z axis and it wont let me go further than 100mm
  • 0

Click HERE to help me win a free 3D Printer!

Printrbot Jr v1
Bowden Extruder
M8 threaded rod
Heated Bed
Lots of mods

Printrbot Rules! :D
User avatar
SilverFingers
Waiting for extruder temp...
 
Posts: 99
Joined: 2013-Jun-Sun-16-Jun
Reputation: 2

Re: Z max build Height - Please Help pinpoint the config is

Postby JonS » 2013-Aug-Mon-09-Aug

I loaded the universal f/w yesterday and reversed the y-axis with a negative calibration. Everything is working apart from y homing which attempts to move in a positive direction.
  • 0

Printrbot Metal Plus with:

- Dual Ubis 13S metal hot ends (swapped for original Ubis metals)
- Dual Gear Head extruders
- Heated bed
- PEI print bed film

Printrbot Jr (put out to pasture).
User avatar
JonS
ACME leadscrew
 
Posts: 389
Joined: 2013-May-Fri-22-May
Reputation: 20

Re: Z max build Height - Please Help pinpoint the config is

Postby RetireeJay » 2013-Aug-Mon-12-Aug

JonS wrote:I loaded the universal f/w yesterday and reversed the y-axis with a negative calibration. Everything is working apart from y homing which attempts to move in a positive direction.


Yes, there's a bug in the software. Your best bet is to reverse the Y motor rotation by physically changing the wiring or how the plug connects to the Printrboard. Then you will be able to use a positive Y calibration value AND your homing will work correctly.

If you can just turn the plug around, do it. If not, ask for further instructions or see the info in the first post of this thread: viewtopic.php?f=6&t=2274
  • 0

Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3, upgraded to MK3S
User avatar
RetireeJay
My next printer is...
 
Posts: 4997
Joined: 2013-Jan-Wed-13-Jan
Location: Greenville, SC
Reputation: 498

Re: Z max build Height - Please Help pinpoint the config is

Postby JonS » 2013-Aug-Mon-14-Aug

Thanks! Plug reversal time it is then!

Well, that or put a 90° twist in my belt! ;-)
  • 0

Printrbot Metal Plus with:

- Dual Ubis 13S metal hot ends (swapped for original Ubis metals)
- Dual Gear Head extruders
- Heated bed
- PEI print bed film

Printrbot Jr (put out to pasture).
User avatar
JonS
ACME leadscrew
 
Posts: 389
Joined: 2013-May-Fri-22-May
Reputation: 20

Re: Z max build Height - Please Help pinpoint the config is

Postby JonS » 2013-Aug-Tue-00-Aug

Done! I now have 7-inches of z-height! :-D
  • 0

Printrbot Metal Plus with:

- Dual Ubis 13S metal hot ends (swapped for original Ubis metals)
- Dual Gear Head extruders
- Heated bed
- PEI print bed film

Printrbot Jr (put out to pasture).
User avatar
JonS
ACME leadscrew
 
Posts: 389
Joined: 2013-May-Fri-22-May
Reputation: 20

Re: Z max build Height - Please Help pinpoint the config is

Postby allanonmage » 2013-Dec-Wed-00-Dec

um.... I don't know where this thread went. Did the firmware get updated for the printrbot/LC?
  • 0

Started with a Printrbot LC Kit; now it's a monster as big as a mid size fridge!
Single ATX Power supply, 650 watts, relay controlled heat bed
extra Z height (3+ ft) via longer rods, but I don't use it. Yet. To reduce wobble, I'm using thing:46082 under the Printrbot.
Dual heated beds, 1 currently working; space for a 3rd
Purple gluestick on glass seems to be sticky enough to get adhesion
FB album with pics: https://www.facebook.com/media/set/?set ... ec287e8726

This was supposed to be a tool, not a series of projects... grrrrr......
User avatar
allanonmage
Layer 100 of 1234
 
Posts: 181
Joined: 2012-Dec-Thu-00-Dec
Reputation: 4

Z max build Height - Please Help pinpoint the config issue.

Postby Nickies08 » 2014-Jan-Thu-23-Jan

plexus wrote:Likely, no. The firmware control the min and max. here is the section from the Lincomatic's Marlin fork that is used on the Printrboard:

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 190 //205
#define X_MIN_POS 0
#define Y_MAX_POS 190 //205
#define Y_MIN_POS 0
#define Z_MAX_POS 200
#define Z_MIN_POS 0


I wonder when you buy the Super-Z-Assembly how they get the max Z height higher to use the added mechanical height?


My original Printrbot Printrboard allowed me to use the full height of my new z axis by only changing the height in my printer settings of Repiter to 450mm. However, I currently have a MakerFarm Printrboard installed which I installed the Marlin Unified V2 Firmware onto. Now I am stuck at a max of 200mm. I went into the firmware and changed my Z max to 450 but after uploading it to the board there is no change. The firmware shows the increase to 450mm, Repiter still shows a max height of 450mm but i can only manually move the z axis to a height of 200mm through Repiter. Is there another component of the firmware that needs to be modified to allow for the height increase?

*Update*
I tried uploading the firmware once again and still no effect. Once my printer hits 200mm Z height, it stops going up
  • 0

Printrbot Plus V2.0
Aluminum bearing blocks
Aluminum Build Plate
Robotdigg custom Nema 17 motors with 500mm T8*8 Acme Rods on Z-axis (19" of print height)
Wire extensions to accommodate extra build height
GT2 Belts and Pulleys
Nickies08
Solid infill...
 
Posts: 237
Joined: 2013-Jun-Fri-11-Jun
Reputation: 6


Return to Mod talk

Who is online

Users browsing this forum: No registered users and 1 guest

cron