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by PJR
Oct 18, 2018 7:54 am
Forum: General discussion, announcements and releases
Topic: Z-Offset less stables since MMU?
Replies: 2
Views: 40

Re: Z-Offset less stables since MMU?

Anyone else seeing this? Yes, for the first 2 to 3 weeks, then it settled down and I haven't changed anything since. Don't know what it is, but I had exactly the same with MMU1, with varying first layer adhesion. I have a feeling that it's not the upgrade causing this, just some adjustments that wo...
by PJR
Oct 18, 2018 7:50 am
Forum: General discussion, announcements and releases
Topic: Filament Profiles
Replies: 3
Views: 77

Re: Filament Profiles

paul.m27 wrote:
Oct 17, 2018 8:02 pm
140 mm/s starting unload speed
From memory, E motor speed is limited to 100mm/s (or 120mm/s) in firmware (M203 E7200)

The actual limit is determined by the MCU and the individual motor. Pushing it above the limits causes missed steps, stringing and failed unloads/loads.

Peter
by PJR
Oct 18, 2018 7:44 am
Forum: User mods - OctoPrint, enclosures, nozzles, ...
Topic: MMU2 and Octoprint
Replies: 3
Views: 37

Re: MMU2 and Octoprint

toaf wrote:
Oct 18, 2018 7:41 am
via usb pie3? im guessing
Using a Pi2+ - same Pi I have been using for a couple of years.

Peter
by PJR
Oct 18, 2018 7:40 am
Forum: Hardware, firmware and software help
Topic: A few MMU upgrades/Fixes
Replies: 7
Views: 211

Re: A few MMU upgrades/Fixes

Some months ago, during the heat wave, when everyone was having issues with throat sticking, I added a heat-sink to the extruder for long prints. I found it much easier to drop the motor current when printing, increasing it during tool changes and reducing holding current. M911 E16 ; reduce holding...
by PJR
Oct 18, 2018 7:36 am
Forum: User mods - OctoPrint, enclosures, nozzles, ...
Topic: MMU2 and Octoprint
Replies: 3
Views: 37

Re: MMU2 and Octoprint

Been running perfectly for well over a month.

Peter
by PJR
Oct 17, 2018 2:16 pm
Forum: Assembly and first prints troubleshooting
Topic: MMU Motors warm while idle
Replies: 5
Views: 158

Re: MMU Motors warm while idle

I dont know if PRUSA driver boards use a lower power standby for the steppers and I doubt they are using gearhead steppers. Yes, the Trinamic drivers (and MMU firmware) employ both "holding" and "running" currents, with the "holding" current being used when the motor is not in use. However, the sit...
by PJR
Oct 16, 2018 8:21 am
Forum: General discussion, announcements and releases
Topic: Filament feed error damaged the filament sensor
Replies: 4
Views: 107

Re: Filament feed error damaged the filament sensor

The optical filament sensor is not currently in use; the printer with MMU works fine without it.

Peter
by PJR
Oct 15, 2018 7:58 pm
Forum: General discussion, announcements and releases
Topic: Compatibility with mk3 sliced files
Replies: 1
Views: 64

Re: Compatibility with mk3 sliced files

jokohoko wrote:
Oct 15, 2018 3:44 pm
Now is it possible with the MK3 MMU2 to print using a file sliced for a regular MK3 without issues?
No, the load at the start and unload at the end are different.

Peter
by PJR
Oct 15, 2018 7:46 pm
Forum: Assembly and first prints troubleshooting
Topic: Uninstalling MMU2
Replies: 7
Views: 131

Re: Uninstalling MMU2

No it's not necessary to re-flash the firmware. Printer firmware recognises the MMU when it is attached.

All you need to do is to turn the printer off, disconnect the 2 cables between Einsy and MMU at MMU end, remove MMU, replace the spool holder and turn on printer.

Peter

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