I am begging you for help with my Rostock Delta August 06, 2015 08:11AM |
Registered: 9 years ago Posts: 65 |
Re: I am begging you for help with my Rostock Delta August 06, 2015 08:53AM |
Registered: 10 years ago Posts: 14,685 |
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TehStranger
When it's printing, the nozzle lifts when it goes near the towers even though I have calibrated each tower.
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TehStranger
I measure 566.42mm from nozzle to bed but I have to set the Z_MAX_LENGTH to 264 otherwise it crashes into the bed if it is set any higher.
It prints objects WAY too big then they are supposed to be.
...
The gears on my motors are 40t and the belts are 2mm pitch 6mm width.
Re: I am begging you for help with my Rostock Delta August 06, 2015 09:22AM |
Registered: 9 years ago Posts: 65 |
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dc42
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TehStranger
When it's printing, the nozzle lifts when it goes near the towers even though I have calibrated each tower.
That means your delta radius needs to be increased in the firmware config. That will raise the nozzle height at the centre a lot, and the height near the towers a little. When you get the heights the same, reduce Z_MAX_LENGTH to place Z=0 on the bed.
Quote
TehStranger
I measure 566.42mm from nozzle to bed but I have to set the Z_MAX_LENGTH to 264 otherwise it crashes into the bed if it is set any higher.
It prints objects WAY too big then they are supposed to be.
...
The gears on my motors are 40t and the belts are 2mm pitch 6mm width.
40t is way too much. Use 16t or 20t. At 16t you need to set the axis steps per mm in the firmware to 100. For 20t use 80. For 40t you need 40 steps/mm, but your resolution won't be very good.
Re: I am begging you for help with my Rostock Delta August 06, 2015 09:40AM |
Registered: 9 years ago Posts: 65 |
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dc42
Quote
TehStranger
When it's printing, the nozzle lifts when it goes near the towers even though I have calibrated each tower.
That means your delta radius needs to be increased in the firmware config. That will raise the nozzle height at the centre a lot, and the height near the towers a little. When you get the heights the same, reduce Z_MAX_LENGTH to place Z=0 on the bed.
Quote
TehStranger
I measure 566.42mm from nozzle to bed but I have to set the Z_MAX_LENGTH to 264 otherwise it crashes into the bed if it is set any higher.
It prints objects WAY too big then they are supposed to be.
...
The gears on my motors are 40t and the belts are 2mm pitch 6mm width.
40t is way too much. Use 16t or 20t. At 16t you need to set the axis steps per mm in the firmware to 100. For 20t use 80. For 40t you need 40 steps/mm, but your resolution won't be very good.
Re: I am begging you for help with my Rostock Delta August 06, 2015 09:41AM |
Registered: 10 years ago Posts: 14,685 |
Re: I am begging you for help with my Rostock Delta August 06, 2015 11:20AM |
Registered: 9 years ago Posts: 65 |
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dc42
As a rough guide, assuming you have your diagonal rod length configured correctly, you need to adjust your configured delta radius by about 2.2 times the height difference between the bed centre and near the towers. So about 4.4mm.
Re: I am begging you for help with my Rostock Delta August 06, 2015 12:32PM |
Registered: 10 years ago Posts: 14,685 |
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TehStranger
Well I have the diagonal rod set to the default 250mm, isn't that correct? I'm using the printed ones.
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TehStranger
At the moment my tower Z levels are 35.500 and centre is 33.900. My brain hit a dead end, I am lost as to what I have to do next. I offer my apologies for asking for so much help.
Re: I am begging you for help with my Rostock Delta August 06, 2015 12:56PM |
Registered: 9 years ago Posts: 65 |
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dc42
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TehStranger
Well I have the diagonal rod set to the default 250mm, isn't that correct? I'm using the printed ones.
So are your diagonal rods 250mm long, between bearing centres?
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TehStranger
At the moment my tower Z levels are 35.500 and centre is 33.900. My brain hit a dead end, I am lost as to what I have to do next. I offer my apologies for asking for so much help.
I already told you to adjust the delta radius in the firmware to fix that.
Re: I am begging you for help with my Rostock Delta August 06, 2015 02:13PM |
Registered: 10 years ago Posts: 903 |
Re: I am begging you for help with my Rostock Delta August 06, 2015 09:54PM |
Registered: 9 years ago Posts: 65 |
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vreihen
Did you first calibrate the three endstops? What calibration instructions are you following? Just trying to figure out where to start, rather than everyone just throwing random numbers at it.....
Re: I am begging you for help with my Rostock Delta August 07, 2015 12:34PM |
Registered: 9 years ago Posts: 65 |
Re: I am begging you for help with my Rostock Delta August 07, 2015 01:00PM |
Registered: 9 years ago Posts: 445 |
Re: I am begging you for help with my Rostock Delta August 07, 2015 01:18PM |
Registered: 9 years ago Posts: 65 |
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Koenig
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TehStranger
bump
Here's a good video-tutorial using M666 and M665 command: [www.youtube.com]
Re: I am begging you for help with my Rostock Delta August 14, 2015 07:28AM |
Registered: 9 years ago Posts: 65 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 07:51AM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 08:18AM |
Registered: 9 years ago Posts: 65 |
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LarsK
Good morning,
Please post the following:
1) Your Configuration.h - Make sure that you implement all changes that you only made to EEPROM to that file [1]
2) A picture of your entire printer
3) A picture of your RAMPS looking down on it from a top view
4) Do the following commands:
G28
G1 X0 Y0 Z23.85
After you do those commands place a SD card (the normal big type) either under the nozzle. A sketch is shown here:
Take a picture of that from the side view much like I sketched it here. If the SD card does not fit under the nozzle you place it next to.
5) Do the following commands:
G28
G1 X40 Y0 Z23.85
After you do those commands you put the SD card again under the nozzle and take a new picture.
Post all photos at full resolution for us to see. I personally like google photos which by clicking the share button allows you to get a link to your album that you can quickly share here. Other sites are obviously also OK. Down sizing the photo to 800x600 or something is not OK.
Re: I am begging you for help with my Rostock Delta August 14, 2015 08:45AM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 08:48AM |
Registered: 9 years ago Posts: 65 |
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LarsK
Two things;
a)
In your config:
// Horizontal offset of the universal joints on the carriages.
#define DELTA_CARRIAGE_OFFSET 22 // mm
Please change that to:
// Horizontal offset of the universal joints on the carriages.
#define DELTA_CARRIAGE_OFFSET 18 // mm
Upload that and ensure that it gets loaded to EEPROM. I am not familiar with Marlin so I do not know if that happens automatically when you flash. It would be easier for me to help if you went back to repetier but it is not critical.
b) I don't know if it is my Dropbox skills or what, but I can't seem seem to find a picture of the SD card and nozzle in center ( point 4 above where we centered the nozzle ( G28 ; G1 X0 Y0 Z23.85 )). I only see two photos (one of the printer and one of the nozzle at the side). Can you verify that you made a picture with the printer in center?
If you did not yet make the photo then please repeat both the centering and the nozzle at the side photo with the new config as per point (a) above.
Re: I am begging you for help with my Rostock Delta August 14, 2015 08:57AM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 08:59AM |
Registered: 9 years ago Posts: 65 |
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LarsK
I forgot you also need to change the following in the firmware:
#define XYZ_FULL_STEPS_PER_ROTATION 200
#define XYZ_MICROSTEPS 16
#define XYZ_BELT_PITCH 2
#define XYZ_PULLEY_TEETH 40
#define XYZ_STEPS (XYZ_FULL_STEPS_PER_ROTATION * XYZ_MICROSTEPS / double(XYZ_BELT_PITCH) / double(XYZ_PULLEY_TEETH))
Re: I am begging you for help with my Rostock Delta August 14, 2015 09:33AM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 09:52AM |
Registered: 9 years ago Posts: 65 |
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LarsK
Ok, for the time being lets stick to Marlin. If below does not work out we go back to repetier.
Please ensure that you implement the correction from above to your firmware and re-flash. I am refering to the 22 mm to 18 mm. Then issue the command
M502
M501
Then recalibrate the Z height for the center (ignore the problem with the nozzle lifting at the sides for now). When calibrating the Z-height the nozzle now needs to come with-in a papers height to the bed.
To do that you will only need to change the parameter:
#define MANUAL_Z_HOME_POS 556.3 // For delta: Distance between nozzle and print surface after homing.
The best way to find that number is to issue the command:
G28
G1 X0 Y0 Z0
Then find something that fits between nozzle and bed and measure that. If that is 5 mm thick then you add 5 mm to the 556.3 and your new MANUAL_Z_HOME_POS would become 561.3
Once you have managed to get the nozzle to touch within a paper the bed you need to redo step (4) and (5) from my first post. Those were the steps that made you center with a SD card and moved to the side with an SD card. Post pictures again.
I will not have more time for troubleshooting for the rest of the day so please be careful to double check that you do all the steps lined out and I will reply this evening or tomorrow - Or someone else may put in ideas.
Re: I am begging you for help with my Rostock Delta August 14, 2015 10:39AM |
Registered: 9 years ago Posts: 65 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 12:40PM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 14, 2015 01:38PM |
Registered: 9 years ago Posts: 65 |
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LarsK
Just need the photo with the nozzle at X40 now.
Re: I am begging you for help with my Rostock Delta August 15, 2015 11:55AM |
Registered: 9 years ago Posts: 65 |
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LarsK
Just need the photo with the nozzle at X40 now.
Re: I am begging you for help with my Rostock Delta August 15, 2015 03:33PM |
Registered: 9 years ago Posts: 346 |
Re: I am begging you for help with my Rostock Delta August 16, 2015 02:50AM |
Registered: 9 years ago Posts: 65 |
Re: I am begging you for help with my Rostock Delta August 16, 2015 03:47AM |
Registered: 9 years ago Posts: 65 |
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LarsK
Change diagonal rod length from 250 to 253
Redo the test and see if that improves. It should bring you so close that you can print with it.
Re: I am begging you for help with my Rostock Delta August 16, 2015 07:43AM |
Registered: 9 years ago Posts: 346 |