Mounting a direct drive to a CR10 carriage
-
I am about to convert a bowden setup CR10-S5 into a direct drive setup using a BMG LGX extruder. I have two options of mounting the extruder and hot end combo and I would like to run the options up a flag post and see what peoples thoughts are.
The mounting plate on the carriage is a vertical plate mounted to the side of a V slot extrusion and under normal circumstances the hot end and fans attach to the side of this plate and are running off center to the rail but being bowden configuration, they are fairly light.
The replacement extruder and hotend is substantially heavier compared to just the hot end (by about 300 grams) and also further outboard of the rail putting a heavier torque on the rail. I also expect to eventually mount a second direct extruder as well which increases the load on the carriage even more.
The CR10-S5 is 500 mm tall and really doesn't support to print a model that tall because the bed moves in the Y direction.
One option I was thinking about is mounting the extruders and hot ends underneath the rail rather than the side so that the weight is much more centered under the roller wheels rather than offset and torquing on the rail. With the extra height of the CR10-S5, I am unlikely to miss the maybe 50 or more mm of print height that mounting the hardware underneath the x rail would cause.
My question: Does it make sense to mount the extruders and hotends underneath the rail rather than off on one side? Will I improve the mechanics of the situation at all or am I chasing tiny tiny issues that really are not worth chasing?Thoughts ?
-
@jens55 said in Mounting a direct drive to a CR10 carriage:
Does it make sense to mount the extruders and hotends underneath the rail rather than off on one side?
Yes it makes sense.
@jens55 said in Mounting a direct drive to a CR10 carriage:
Will I improve the mechanics of the situation at all or am I chasing tiny tiny issues that really are not worth chasing?
Well maybe. The giant be on the Y axis will be a larger limiting factor anyway, so you probably won't be using speeds that will make the carriage hanging off the X axis an issue, but can't know for certain until you try it.
-
@jens55
that was the moment, when I opted for linear rails vs. V-rollers. They can take the tilt much better. But with two extruders in saddle-pack fashion you can also use the rollers.
