FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
I just upgraded my working MK4 to an MK4S. Firmware 6.1.3 loaded before the update. Some things that you aren't told.
The wifi update changes your Wifi Mac Address. It will most likely change the IP address in the router. Which means if you use HTTP://192.168.xx.xxx to address the physical printer in PrusaSlicer, you will have to edit all the Physical printer definitions. You have to add the MK4S to the configuration so you are in there doing updates already. Also update your Prusalink web address.
An alternate to http://192.168.xx.xxx is to use the hostname set in the MK4S printer. Example http://MKx-hostname The hostname can be set in Settings, Network, WIFI, hostname. If you use the http://hostname for PrusaSlicer, it doesn't matter if the IP address changes.
Prusaconnect did not connect to the printer after the upgrade. Had to add the MK4S as a new printer. When I tried to configure the MK4S for a new PrusaConnect using Menu : Settings, network, Prusa Connect, Add Printer to Connect. It failed, over and over. Finaly I turned off Prusa Connect in the menu, exited the Prusa Connect menu. Then went back in, enabled Prusa Connect and then the Add Printer to Connect function worked right away. Disabling/re-enabling the Prusa Connect in the menu seams to have cleared old data enabling it to work.
The new cover for the nextruder did not have a spacer washer. I looked at the old cover and the spacer washer in the cover did not appear to have been rubbing on the gears, so I guess it is not needed.
When setting the type to MK4S under hardware, don't forget to enable using a Sock in the Hardware settings also. For those that have not been using a sock already.
I already had the MMU3 Nextruder upgrade parts in place, I kept the MMU3 versions and did not use the new PCCF tensioner, idler and main plate pieces.
RE: FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
I did not have any WiFi issues after replacing the module, I did not need to pair it again with the network or Prusa Connect either.
Sock settings were true, you need to update it as well as the model to MK4S.
RE: FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
More than you want to know notes on the MK4, MK4S and MMU3. It covers the MK4S changes.
RE: FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
You mention the stepper motors pulse at 400 per revolution, is this a standard installation new Prusa printers ?
copied from your recent review and info, "400 pulse per rev servos".
John
RE: FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
400 steps or .9 degrees for XY on the MK4 is mentioned in this article. https://blog.prusa3d.com/announcing-original-prusa-mk4_76585
RE: FYI on upgrading from MK3.9/MK4 to MK3.9S/MK4S
Thanks for the link.
I am in the process of designing and manufacturing my own core X Y Z printer and
using continuous ball leadscrews and nuts. for X Y Z
The extruder head, then possibly the old type metal single drive M8 as I have a few around the shop.
I will source the Nema 17 type steppers pulse 0.9 or 400 pulses per rev. Should be no problem. Steppers on Line are company I have used in the past.
I will possibly use grbl or Marlin and an Arduino 2560 for the control. The GT 2560 maybe a ready plug and play cheap option as I do not want
all the new bells and whistles and multi print/gradient options and all the issues surrounding them.
With the current 3D bench printers, the manufacturing tolerances of the rubber timing belts and the typical T5 pulleys, my opinion is 1.8 or 200 pulses per rev is more than adequate for most needs, replacement motors are cheap and readily available, but if Prusa builds this feature into there machines then that is brilliant.
A very good marketing add on for those who as you have said in the past, "some people want a printer as a project" and not as like me I need a manufacturing tool.