Talk:Sells Mendel 201105
Notes on Sells Mendel
The number of teeth on the z_driven_pulley is 21.
The number of teeth on the x, y, and z pulleys is 8. The diameter is 12.5 (radius 6.25).
The pitch of the 8mm threaded rod employed in the Z axis is 1.25 . It takes 8 full revolutions to travel 10mm.
Any firmware used *must* leave the Z axis turned on during printing, or vertical movement will be lost. During a print you can lose 10-20% of Z travel if not.
The steps given in the firmware for e_steps is (normally) based on the steps required for 1mm of movement.
The x-axis e_steps is based on 16 microsteps per motor step, 200 motor steps per revolution, and 39.26987mm (2*3.14159*6.25) travel per revolution. This comes out to 81.4874 microsteps per 1mm of travel.
The y-axis e_steps is based on the same as the x-axis.
The z-axis e_steps is based on 16 microsteps per motor step, 200 motor steps per revolution, 0.3809 (8/21) z-axis revolutions per z-pulley revolution, and 1.25mm of z-axis travel per z-axis revolution. This comes out to 975.1040 microsteps per 1mm of travel.
About Greg's Accessible extruder mount. The large extruder gear is 43 teeth and ~68mm diameter. The small extruder gear is 10 teeth and <Y> diameter.</del>
Notes on Mendel 201105
Here is a run-down of what is currently installed
- RAMPS v1.2, at reprap.org
- MakerGear StepStruder, at MakerGear.com (installed 20111024)
- Drive gear, part is from sdp-si.com
- Part Number S10T05M020S0508
- Unit Metric
- Module ( Pitch) 0.5
- No. Of Teeth 20
- Material 303 Stainless Steel
- Hub Style With Hub & set screw
- Quality Class ISO 7 / AGMA 10
- Pressure Angle 20°
- Bore Size 8.00 mm
- Face Width 5.00 mm
- Pitch Dia. 10.00 mm
- Hub Dia. (0 = Hubless) 12.00 mm
- Geared Stepper Motor with 5.16:1 reduction and 8mm shaft (according to Makergear, was '13:6:1') https://www.makergear.com/products/extruder-motor?variant=21668418500
- Assembly / Mounting instructions
- Drive gear, part is from sdp-si.com
- Mendel Alternate X Motor Bracket
- 463mm X-axis smooth rods
- 1300mm X-axis belt (http://reprap.org/wiki/Mendel_assembly_data_sheet Mendel_M4_lengths tab)
- 810mm Y-axis belt (http://reprap.org/wiki/Mendel_assembly_data_sheet Mendel_M4_lengths tab)
- Note that a single SDP-SI.com belt, model "A 6R51MB09060", is large enough for both the X-axis and Y-axis belts (at 2218mm in length and 6mm in width.)
- 960-1008mm Z-axis continuous belt (http://reprap.org/wiki/Mendel_assembly_data_sheet Mendel_M4_lengths tab)
- X Carrier Bling (installed 20120229?)
- History
- Misumu parts (ordered 20120302)
- 2 GPA32GT2060-B-P5
- 2 GPA32GT2060-A-P5
- 4 GBN9942GT-60
- Misumu parts (ordered 20120302)
