I recently wanted to change my A20M to a single nozzle printer (to eliminate the right angle turns built into the mixing hotend). In the end, I think the design will likely work for an A10/A20 or A10M/A20M. You'll have to let me know.
- I upgraded the hotend cooling fans to 40x40x20mm (24V) versions (many on Amazon)
- I also upgraded the part cooling blower to a 50x15mm (24V) blower (many on Amazon)
- The cooling fan on the left side needed a fixture to move it out so it doesn't hit the X-servo, and the carriage can reach the limit switch.
- I designed a part cooling blower duct with a built in BL Touch mount that fits nicely.
I mounted the parts to the A20M cage using M3 cap head screws and locknuts.
- The left side mount went on first using two 12mm screws and locknuts.
- The left side fan went onto the mount, threading two 25mm screws into the undersized holes on the mount, with the sticker on the fan facing out.
- The right side fan went onto the cage using two 20mm screws with the label on the fan facing in.
- The blower mounted to the blower duct using a 25mm screw and locknut.
- The BL Touch mounted to the blower duct using two 8mm screws and locknuts.
- The blower mounted to the hotend cage using three 8mm M2 screws (the ones that previously held the original front-mounted cooling fan)
- The BL touch wires route under the clip on the top of the left side mount. (not shown in my picture as this was a recent add if I ever re-print the mount)
If you want to update the location of the BL Touch Sensor relative to the nozzle in your Config.h file:
- Search in config.h file for X_PROBE_OFFSET_FROM_EXTRUDER
- my best measurement of the offset is dX = -26.5mm, dY = -42.3mm. Should get you close enough.
- You can either adjust the z offset here based on your measured mounting, or just adjust the Z-offset in the controls menu to get a good first layer. I suggest the latter... I ended up with a z offset of -2.40 using the non-mixing nozzle and hotend.
SolidWorks files included in .zip file if you want to improve it. You may need to replace the connectors on the fan wires, depending on what size yours comes with... something to pay attention to.
It seems to work really well from my experience with it. You should be able to feel a strong flow of warm air out the left side of the left fan, and if you put your hand along the rear of the hotend when it is near the bed, you should feel a strong flow of air moving across the surface of the bed.
Attribution on the mount for the blower to https://www.thingiverse.com/thing:3535292.
0.15mm layer height, 3600mm/min
Printed both parts at 195oC with a 60oC bed.
I oriented the left side mount on its back (the obvious way) - should not require supports that way.
I oriented the blower duct with the outlet nozzle on the bed. This puts the supports on the side of the part that you don't see once it's mounted on the hotend cage. I used 20% support on the part, and made sure in the settings that supports were not printed within the nozzle itself... the nozzle shouldn't need supports as the overhang angle isn't that great.