Firmware question
Posted by Bill Clark
|
Firmware question April 07, 2014 01:14AM |
Registered: 10 years ago Posts: 239 |
I don't think the firmware section gets a lot of traffic so would any of you firmware savvy gents mind taking a look at this?
[forums.reprap.org]
[forums.reprap.org]
|
Re: Firmware question April 07, 2014 05:00AM |
Registered: 11 years ago Posts: 1,592 |
|
Re: Firmware question April 07, 2014 07:15AM |
Registered: 10 years ago Posts: 239 |
No. the switch appears consistent. I mean I may want .01 or .015mm clearance for example but want to achieve that without the use of a "feel" gauge. In other words, touch the nozzle to my 50.8mm tall electronic height indicator I use for setting milling cutters and then enter a offset value of 50.81
Edited 1 time(s). Last edit at 04/07/2014 07:16AM by Bill Clark.
Edited 1 time(s). Last edit at 04/07/2014 07:16AM by Bill Clark.
|
Re: Firmware question April 07, 2014 07:39AM |
Registered: 11 years ago Posts: 296 |
Take a look at this may be different approach, but does work:
[www.hydraraptor.blogspot.de]
[www.hydraraptor.blogspot.de]
|
Re: Firmware question April 07, 2014 07:46AM |
Admin Registered: 13 years ago Posts: 7,002 |
how does this electronic height indicator work? if it can be made to output a 5v or close a relay on contact.. if so just use it instead of a mechanical z endstop switch
Then put something like the following into your gcode start file
g28 (home all axis)
g92 z50.81 (z is now at 50.81)
remove block.
g1 z0 (move to z0)
has to be above z50.8 to work though..
Edited 1 time(s). Last edit at 04/07/2014 07:54AM by Dust.
Then put something like the following into your gcode start file
g28 (home all axis)
g92 z50.81 (z is now at 50.81)
remove block.
g1 z0 (move to z0)
has to be above z50.8 to work though..
Edited 1 time(s). Last edit at 04/07/2014 07:54AM by Dust.
|
Re: Firmware question April 07, 2014 08:37AM |
Registered: 10 years ago Posts: 474 |
is this the robo printer The screws they use for the Z are not anti-backlash so the whole thing relies on gravity keeping it pulled one way if the Z in any way as any bind at all in places it will cause this. The X carriage has to fall by its own weight to keep all the backlash out you could possibly test by adding a good amount of weight to the X just for the test not to run and use your height gauge and see how accurate it is with extra weight
Edited 2 time(s). Last edit at 04/07/2014 08:50AM by cnc dick.
Edited 2 time(s). Last edit at 04/07/2014 08:50AM by cnc dick.
|
Re: Firmware question April 07, 2014 01:00PM |
Registered: 10 years ago Posts: 239 |
Dust, I think you nailed it. The gauge does turn on a light powered by 4.5v (3x1.5v batts)
will the 5v signal work down to 4.5v or a little less. No need to add code as Repetier allows you to enter a Z offset.
Dick, yes it is robo.the machine is consistent (now that I replaced the screws, nuts, shafts and squared it up. just looking for an accurate way of setting nozzle height to a particular value
will the 5v signal work down to 4.5v or a little less. No need to add code as Repetier allows you to enter a Z offset.
Dick, yes it is robo.the machine is consistent (now that I replaced the screws, nuts, shafts and squared it up. just looking for an accurate way of setting nozzle height to a particular value
|
Re: Firmware question April 07, 2014 01:24PM |
Registered: 10 years ago Posts: 553 |
Why does it need to go into the firmware? If you are always using repetier, the Z height offset tends to be a set-it-and-forget-it value.
greghoge.com
HUGE 3D PRINTER PARTS SALE!!!
greghoge.com
HUGE 3D PRINTER PARTS SALE!!!
|
Re: Firmware question April 07, 2014 07:20PM |
Registered: 10 years ago Posts: 239 |
Sorry, only registered users may post in this forum.