LR3 Kit came with Dupont connectors on the steppers and extension wires. Ok to use as-is?
LR3 build doc Wire Routing section says to read Control pages, the Control → SKR page recommends Molex instead of JST, including removing JST shields so stepper/endstop wiring make better connections.
Unless someone recommends otherwise, am going ahead with just making the Dupont connectors work, with the JST shields removed. Duponts seem to fit tight enough. Will ensure taped/grommet/other strain relief where possible to avoid wiring shaking loose when in use.
How should wiring extension be connected, with strain relief, especially for the X Axis stepper/endstops that will be moving?
Currently… to ensure connectors are not strained/pull-apart, bend extension wiring back on itself couple of times, then tightly wrap insulation tape ~3 times either side of the dupont connectors.
Planning to additionally heatshrink over at least the dupont connections. If I have large enough heatshrink, will wrap the zig-zagged wiring even. Too much? Everything gets shoved into 3/4" mesh cable protector, velcro fastened to left ~40% of the beam.
For the Rail’s Y and Z steppers/endstops, which won’t be moved/flexed, I used soldered Butt Connectors, wrapped with heat shrink, then shoved wiring through 1/2" mesh cable protector.
That will work or you should have enough length to move the connector up to where it will not move on the core? What you have looks pretty good though if you keep the bend radius relaxed.
Thanks Ryan, will stick with that for now then. Seemed like quick reliable enough way to connect, will look neater when shoved into cable protector. Curious what beautiful/elegant reliable cable management solutions others have come up with.
There is enough extension to get connectors to be stationary and zip tied to the Core. But then I’d have to either shorten and crimp/solder the excess stepper/endstop wiring, or, make an unsightly bundle. Might revisit later, today’s goal is wire and power up my LR3.
Better layout? Looked at connecting wire extension on the core, placing connectors between the two top zip ties. Looping excess stepper/endstop wire within 3/4" cable protector.
Pics below do not show the insulation tape, heatshrink and cable protector that will be added to secure and pretty it up.
Can 24V power supply be used with SKR Pro 1.2 as-is?
Is chopping firmware update required, or just recommended?
Is this a recommended enhancement to increase torque and reduce missed steps?
Can the Kit’s steppers and drivers handle, any lifetime, excessive heat concerns, and/or other issues to be aware of?
My V1E LR3 Kit came with a Kastar 12V 6A power supply, which works great. But…
I happen to have a Mean Well HLG-240H-24A 24V 10A lying around. So…
Given…
SKR Pro 1.2 User Manual says “… Motherboard parameters … Input voltage: DC12V- DC24V …”.
Misc forum post suggest switching power supply to 24V will work without firmware updates. For example 12v-vs-24v-powersupply-for-skr-pro-1-2 discussion.
Regret soldering the Y-axis endstops already. I should’ve used decent tight spade connectors, rather than making beautifully soldered heatshrink connections to the proud/exposed, but somewhat fragile Y-axis endstops.
My LR3 fell off my janky 5’x10’ sled during first vertical lift for storage. Naturally, the Y-axis endstop decided to cushion the fall with the switch metal spring arm disappearing off somewhere into the garage ether, never to be found again. Fortunately, I had an extra endstop available and was able to scavenge the arm.
Lessons/retrospective…
Store and access LR3 when sober and alert.
Order a few extra spare endstops.
Use spade connectors for Y-Axis endstop, instead of soldering, until if/when design is tweaked with a shroud or outer bumper to provide some protection for the Y-Axis endstop.
Don’t route wiring too tight for soldered connections, leave additional extra/flex for future repairs.
Consider looking for hardy robust endstops that can take some abuse. Any suggestions?
