Geared Down Stepper Motors: Difference between revisions
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(Created page with "*27-1 is about what we need for 100 lb of drive force using a 1" pulley. [https://www.amazon.com/27-Planetary-Gearbox-Stepper-Printer/dp/B00QEUZ9EM/ref=pd_sim_b2b_4/132-363695...") |
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*27-1 is about what we need for 100 lb of drive force using a 1" pulley. [https://www.amazon.com/27-Planetary-Gearbox-Stepper-Printer/dp/B00QEUZ9EM/ref=pd_sim_b2b_4/132-3636958-4328234?_encoding=UTF8&pd_rd_i=B00QEUZ9EM&pd_rd_r=cd73827e-6db8-11e9-aa9e-d325bbd273f6&pd_rd_w=tBLdR&pd_rd_wg=EZdYY&pf_rd_p=a07701e4-f565-442a-b97f-93ab23cbb7ef&pf_rd_r=FTB4XJGQ3A1G98Z3FJTE&psc=1&refRID=FTB4XJGQ3A1G98Z3FJTE] | *27-1 is about what we need for 100 lb of drive force using a 1" pulley. [https://www.amazon.com/27-Planetary-Gearbox-Stepper-Printer/dp/B00QEUZ9EM/ref=pd_sim_b2b_4/132-3636958-4328234?_encoding=UTF8&pd_rd_i=B00QEUZ9EM&pd_rd_r=cd73827e-6db8-11e9-aa9e-d325bbd273f6&pd_rd_w=tBLdR&pd_rd_wg=EZdYY&pf_rd_p=a07701e4-f565-442a-b97f-93ab23cbb7ef&pf_rd_r=FTB4XJGQ3A1G98Z3FJTE&psc=1&refRID=FTB4XJGQ3A1G98Z3FJTE]. But only 425 oz in of torque. Only about 53 lb force at a 1/2" radius drive. | ||
*Note you can get a Nema 34 for the same price - [https://www.amazon.com/Stepper-Motor-4-5Nm-Length-Router/dp/B077XF6LG2/ref=sr_1_3?keywords=nema+34+motor&qid=1556898222&s=hi&sr=1-3] | |||
*For a similar price, we can get a nema 23 or 36 with no geardown. | |||
*We need about 9x geardown compared to a regular motor based on acceptable force of belt (9x the belt width).But we need double sided drive for more force. | |||
*Need 12 motors. It may be that 9x 3d printed planetary geardown is the way to go. | |||
=Compare to Nema 23= | |||
*425 oz in - $36 - [https://www.amazon.com/Torque-Stepper-Motor-425oz-Router/dp/B00PNEPW4C/ref=sr_1_7?keywords=nema+34&qid=1556898559&s=hi&sr=1-7]. More cost effective to use larger stepper. | |||
=Design Notes= | |||
*There are very strong Nema 34 motors that cost less for the drive force - $60 for 1200 oz in. 14 mm shaft with 5 mm keyway. [https://www.amazon.com/Stepper-Motor-8-5Nm-Length-Router/dp/B077X9R2CW/ref=pd_sim_b2b_2/132-3636958-4328234?_encoding=UTF8&pd_rd_i=B077X9R2CW&pd_rd_r=41402cc6-6dba-11e9-bb97-5bfe772d8d81&pd_rd_w=L6Atj&pd_rd_wg=2Y7Dw&pf_rd_p=a07701e4-f565-442a-b97f-93ab23cbb7ef&pf_rd_r=CF7ZVXWQ87Q34C0TA6Q5&psc=1&refRID=CF7ZVXWQ87Q34C0TA6Q5] | |||
*We can do a connecting shaft drive to drive 2 axes at once | |||
*Still need $360 of motors here | |||
*Only low cost way is 12*$8 = $100 if use 3D printed planetary geardowns with backlash correction. | |||
Latest revision as of 15:51, 3 May 2019
- 27-1 is about what we need for 100 lb of drive force using a 1" pulley. [1]. But only 425 oz in of torque. Only about 53 lb force at a 1/2" radius drive.
- Note you can get a Nema 34 for the same price - [2]
- For a similar price, we can get a nema 23 or 36 with no geardown.
- We need about 9x geardown compared to a regular motor based on acceptable force of belt (9x the belt width).But we need double sided drive for more force.
- Need 12 motors. It may be that 9x 3d printed planetary geardown is the way to go.
Compare to Nema 23
- 425 oz in - $36 - [3]. More cost effective to use larger stepper.
Design Notes
- There are very strong Nema 34 motors that cost less for the drive force - $60 for 1200 oz in. 14 mm shaft with 5 mm keyway. [4]
- We can do a connecting shaft drive to drive 2 axes at once
- Still need $360 of motors here
- Only low cost way is 12*$8 = $100 if use 3D printed planetary geardowns with backlash correction.