Re: Cherry Pi III Is Available March 27, 2015 02:04AM |
Registered: 11 years ago Posts: 515 |
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Zzyzxx71
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AndyCart
Your tower designations and I assume your stepper and limit switch RAMPS connections are incorrect. X is front left, Y is front right, Z is the rear tower. If you get those correctly connected it may just spring into life!
Awesome - Fixed!
Edit #2: It appears I only have access to the forward left portion of the "cylinder", X only goes left of center, it refuses to go right, same with the rear (regarding the Y axis), it only goes to the front.
Edit#3 - video of the issue can be found here. - [www.youtube.com]
Edit#4 - Ugh - OK I've completely swapped out for a spare ramps shield and replaced the second Y axis end stop, and the behavior is the same. This has to be something in the firmware, I have new end stops, new shield, new connectors, etc. Z axis motion is working as expected, but homing isn't, but only for the Y tower.
Kinda stumped now. Additionally still haven't resolved the "front left quadrant" issue either.
Re: Cherry Pi III Is Available March 27, 2015 05:38AM |
Registered: 10 years ago Posts: 893 |
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AndyCart
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David J
Andy,
Am I right in thinking that you recommend doing the mod on the StepStick motor drivers - shorting out R4, I think? I'll be starting off by using your configuration.h file, so I'll need to match your setup as much as possible. I will be using the 3 links under each driver board.
I have the right soldering kit to make this mod, but I only want to do it if it's a real benefit.
Absolutely, it make a big difference to how quiet the motors run and how much current they draw. Recently the A4988 boards I have been getting have the mod already done. What looks like a SMD resistor at R4 is actually a link
Re: Cherry Pi III Is Available March 27, 2015 06:47AM |
Registered: 11 years ago Posts: 515 |
Re: Cherry Pi III Is Available March 27, 2015 07:28AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available March 27, 2015 10:34AM |
Registered: 10 years ago Posts: 893 |
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gowen
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David J
I've decided to experiment with the power input - I'm planning to use a 203W Xbox PSU to power the printer, so I've decided to take the obvious route and try to fit an Xbox power socket to match. This will have numerous advantages:
- I won't need to modify the PSU lead.
- It's built to take all the power the PSU can offer.
- I will probably be able to fit a switch to turn the PSU on and off remotely.
- I have the choice of powering the Arduino directly with 5v, rather than use the linear voltage regulator built into the Arduino/RAMPS, thus reducing heat output.
Of course, this means that I will have to build a nice enclosure to house the socket and switch (an enjoyable task) and I may have to design a PCB to keep it tidy (should also be fun).
I have ordered the socket on ebay, so watch this space!
Make sure you order the right socket. I had the same idea, but the power socket I ordered was for an Xbox 360 Slim and the PSU I had was for an Xbox ONE. The socket looks the same but the sizes are ever so slightly different. Just enough to mean I couldn't use it.
Re: Cherry Pi III Is Available March 27, 2015 11:25AM |
Registered: 9 years ago Posts: 68 |
It appears this warning appeared because I was compiling using version 1.6 of Arduino. I've now switched to 1.0.6 and it compiles without any warnings.Quote
gowen
With this added it compiled and installed fine although I did get these messages.
Sketch uses 121,982 bytes (48%) of program storage space. Maximum is 253,952 bytes. Global variables use 6,386 bytes (77%) of dynamic memory, leaving 1,806 bytes for local variables. Maximum is 8,192 bytes. Low memory available, stability problems may occur.
Re: Cherry Pi III Is Available March 27, 2015 11:30AM |
Registered: 10 years ago Posts: 893 |
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gowen
It appears this warning appeared because I was compiling using version 1.6 of Arduino. I've now switched to 1.0.6 and it compiles without any warnings.Quote
gowen
With this added it compiled and installed fine although I did get these messages.
Sketch uses 121,982 bytes (48%) of program storage space. Maximum is 253,952 bytes. Global variables use 6,386 bytes (77%) of dynamic memory, leaving 1,806 bytes for local variables. Maximum is 8,192 bytes. Low memory available, stability problems may occur.
Re: Cherry Pi III Is Available March 27, 2015 03:17PM |
Registered: 10 years ago Posts: 111 |
Re: Cherry Pi III Is Available March 27, 2015 11:29PM |
Registered: 11 years ago Posts: 44 |
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AndyCart
Quote
Zzyzxx71
Quote
AndyCart
Your tower designations and I assume your stepper and limit switch RAMPS connections are incorrect. X is front left, Y is front right, Z is the rear tower. If you get those correctly connected it may just spring into life!
Awesome - Fixed!
Edit #2: It appears I only have access to the forward left portion of the "cylinder", X only goes left of center, it refuses to go right, same with the rear (regarding the Y axis), it only goes to the front.
Edit#3 - video of the issue can be found here. - [www.youtube.com]
Edit#4 - Ugh - OK I've completely swapped out for a spare ramps shield and replaced the second Y axis end stop, and the behavior is the same. This has to be something in the firmware, I have new end stops, new shield, new connectors, etc. Z axis motion is working as expected, but homing isn't, but only for the Y tower.
Kinda stumped now. Additionally still haven't resolved the "front left quadrant" issue either.
Sounds more like a host program issue to me. Which host are you using? Have you told it your bed centre is 0,0?
Edit: just looked at your video. I would guess it's limit switch problems. If you move the carriages away from the top what do you see on screen if you send an M119 command?
Re: Cherry Pi III Is Available March 28, 2015 04:30AM |
Registered: 11 years ago Posts: 14,685 |
Re: Cherry Pi III Is Available March 28, 2015 05:53AM |
Registered: 11 years ago Posts: 44 |
Re: Cherry Pi III Is Available March 28, 2015 06:37AM |
Registered: 11 years ago Posts: 14,685 |
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Zzyzxx71
Noted, but I've rebuilt that end stop twice. (using both new switches, and existing working switches). If I screwed this up, I've screwed it up 4+ times.
Re: Cherry Pi III Is Available March 29, 2015 04:49PM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available March 29, 2015 05:41PM |
Registered: 11 years ago Posts: 515 |
Re: Cherry Pi III Is Available March 29, 2015 05:55PM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available March 30, 2015 05:03AM |
Registered: 11 years ago Posts: 515 |
Re: Cherry Pi III Is Available March 30, 2015 05:08AM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available March 30, 2015 10:07AM |
Registered: 9 years ago Posts: 68 |
Re: Cherry Pi III Is Available March 30, 2015 11:10AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available March 30, 2015 11:43AM |
Registered: 10 years ago Posts: 893 |
Re: Cherry Pi III Is Available March 30, 2015 01:05PM |
Registered: 11 years ago Posts: 14,685 |
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gowen
Is trying to auto-calibrate to 0.03 wishful thinking? I've successfully calibrated to 0.05.
Re: Cherry Pi III Is Available March 30, 2015 06:31PM |
Registered: 11 years ago Posts: 515 |
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David J
Oh - one more question - I'm a bit puzzled about the end-stop wiring on the RAMPS board: do the wires go from S to -, or S to + in this configuration?
I've seen instructions on web pages that contradict each other.
Re: Cherry Pi III Is Available March 31, 2015 02:05AM |
Registered: 10 years ago Posts: 164 |
Re: Cherry Pi III Is Available March 31, 2015 03:17AM |
Registered: 11 years ago Posts: 515 |
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David J
How far does the Z carriage travel down the extrusion in use? Or, to look at it the other way round, how close does the bottom of the Z carriage get to the bottom of the extrusion where it sticks out of the bottom corner bracket?
I'm trying to tidy up the wiring from the extruder and hot-end after it's passed through the Z upright, and I'd like to know how far up I can put clips! The slot in the extrusion is now a bit full of wires on the print-bed side...
Re: Cherry Pi III Is Available March 31, 2015 03:54AM |
Registered: 10 years ago Posts: 893 |
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AndyCart
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David J
Oh - one more question - I'm a bit puzzled about the end-stop wiring on the RAMPS board: do the wires go from S to -, or S to + in this configuration?
I've seen instructions on web pages that contradict each other.
I connect to the outboard two pins so S and -VE. As long as you don't short out the 5V rail (inboard two pins) you should be fine
Re: Cherry Pi III Is Available March 31, 2015 05:29AM |
Registered: 10 years ago Posts: 164 |
Re: Cherry Pi III Is Available March 31, 2015 05:42AM |
Registered: 10 years ago Posts: 67 |
Re: Cherry Pi III Is Available March 31, 2015 06:01AM |
Registered: 11 years ago Posts: 515 |
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pugzor
Andy, out of interest, how have you checked the temperature of your hot ends in the past? I got an IR thermometer but it's not effective... I think this is mostly because the emissivity of the hot end is super low.
Quick physics lesson why: IR based temperature measurement is largely dependent on the type of surface. A perfectly black surface with no shine to it at all (matte), has an emissivity of probably 0.990. Most cheap remote thermometers are calibrated to 0.95. Materials like polished metal, glass, etc have emissivity values ~0.05 to 0.1. Long story short, they'll appear to have the temperature of objects around them which has 'bounced' off the surface you're trying to measure. Oh, they usually have a conical measurement area too (the particular one I have has a ratio of 1:12... being if I'm 12m away from something it'll have a measurement area with a 1m diameter.
So there's no real easy way to measure the temperature of my hot end.
Would it just be easiest if I got a new thermister and tried that?
I'm pretty fricken frustrated at the moment. I don't know why it's not feeding filament.
Re: Cherry Pi III Is Available March 31, 2015 06:22AM |
Registered: 10 years ago Posts: 164 |
Re: Cherry Pi III Is Available March 31, 2015 06:35AM |
Registered: 11 years ago Posts: 515 |