delta patterning on vertical surfaces August 30, 2019 06:39PM |
Registered: 4 years ago Posts: 6 |
Re: delta patterning on vertical surfaces August 31, 2019 02:32AM |
Registered: 10 years ago Posts: 14,672 |
Re: delta patterning on vertical surfaces August 31, 2019 03:57AM |
Registered: 4 years ago Posts: 6 |
Re: delta patterning on vertical surfaces September 01, 2019 01:50AM |
Registered: 10 years ago Posts: 14,672 |
Quote
redscorp
The Duet WiFi board will not do it for me, because I use diamond hotend which need 3 extruders, which means 6 stepper drivers in total.
Can mentioned RepRapFirmware be ran on MEGAs or re-ARM?
Re: delta patterning on vertical surfaces September 01, 2019 05:54PM |
Registered: 10 years ago Posts: 732 |
Re: delta patterning on vertical surfaces September 09, 2019 12:35PM |
Registered: 4 years ago Posts: 6 |
Quote
hercek
You have some obvious ringing there which is unrelated to 8-bit electronics. You have way too much elasticity in the printer for the speed/acceleration you are using.
The rest seems to be more like a backslash problem ???
If you think you have problems with poor performance of your 8bit MCU then just lower segments per second to about 80 and print with speed below 100 mm/s. Or even lower segments per second down to about 40 and maximum speed to about 40 mm/s. Then you can expect segmentation errors at most around 5 µm or about one microstep(*) and even 8bit electronics should handle this easily.
(*) Assumes printer dimensions about he same as the original Rostock.
Re: delta patterning on vertical surfaces September 09, 2019 12:45PM |
Registered: 4 years ago Posts: 6 |
Quote
dc42
Quote
redscorp
The Duet WiFi board will not do it for me, because I use diamond hotend which need 3 extruders, which means 6 stepper drivers in total.
Can mentioned RepRapFirmware be ran on MEGAs or re-ARM?
Both the Duet WiFi and Duet Maestro have expansion boards available. For the Duet WiFi and Duet Ethernet there are the DueX2 and DueX5. For the Maestro there is a 2-driver daughter board.
There is a port of RRF for LPC1768/9 based boards such as re-ARM. But does re-ARM support 6 drivers?
Re: delta patterning on vertical surfaces September 09, 2019 08:31PM |
Registered: 10 years ago Posts: 14,672 |
Re: delta patterning on vertical surfaces September 10, 2019 07:04AM |
Registered: 4 years ago Posts: 6 |
Re: delta patterning on vertical surfaces September 10, 2019 08:51AM |
Registered: 10 years ago Posts: 732 |
You can go with segments per second down to 40.Quote
redscorp
External walls are printing on 30 mm/s. Segments are configured on 100
Well, it is a kind of backslash. Or behaves similarly.Quote
redscorp
I've noticed some wobble in my printing heard this could cause this kind of effects.
A common cause of imprecise movement at low speeds/accelerations is bad stepper driver / stepper combination. Typically, the problem is slow decay mode of a "dump" stepper driver with high inductance and low resistance stepper. If you suspect this is your problem then:Quote
redscorp
If this is not a 8-bit math, can it be stepper/driver precision problem. Will activation of 1/256 steps on 2208-UART solve/reduce this kind of effects?
Re: delta patterning on vertical surfaces September 10, 2019 02:36PM |
Registered: 4 years ago Posts: 6 |
Quote
hercek
A common cause of imprecise movement at low speeds/accelerations is bad stepper driver / stepper combination. Typically, the problem is slow decay mode of a "dump" stepper driver with high inductance and low resistance stepper. If you suspect this is your problem then:Quote
redscorp
If this is not a 8-bit math, can it be stepper/driver precision problem. Will activation of 1/256 steps on 2208-UART solve/reduce this kind of effects?
- changing microstepping will not help; it is unrelated
- switch to fast decay mode (or some more advanced mode doing both fast and slow decay at the same time) will help; this means a bit nosier printer
- adding a ballast resistor or diodes will help; this means more wasted energy
Re: delta patterning on vertical surfaces September 10, 2019 03:46PM |
Registered: 4 years ago Posts: 16 |
Re: delta patterning on vertical surfaces September 10, 2019 04:39PM |
Registered: 10 years ago Posts: 732 |
Re: delta patterning on vertical surfaces September 11, 2019 02:38PM |
Registered: 10 years ago Posts: 732 |