Forum: Motors & their mountings
Thu 22 March 2012, 16:43
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Wed 21 March 2012, 06:28
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Replies: 278
Views: 281,544
Guillermo,
A single-stage belt-drive limits...
Guillermo,
A single-stage belt-drive limits you to a ratio of 4:1 maximum, and that's if you use an 18-tooth XL pulley on the motor's shaft and a 72-tooth XL pulley on the drive shaft.
Fifty...
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Forum: Motors & their mountings
Tue 20 March 2012, 06:07
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Replies: 278
Views: 281,544
Guillermo,
Unfortunately, I'm not a...
Guillermo,
Unfortunately, I'm not a mechanical engineer, but I see no reason that your design would not work, if you used idler pulleys on the backside of the belts and if you used a tensioning...
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Forum: Motors & their mountings
Sun 18 March 2012, 21:45
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Replies: 278
Views: 281,544
Guillermo,
I would add a belt-drive to a...
Guillermo,
I would add a belt-drive to a non-geared motor because I had excellent success with that combination on my Shopbot. I tried non-geared motors, then I added belt-drives to the motors,...
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Forum: Motors & their mountings
Sun 18 March 2012, 15:45
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Replies: 278
Views: 281,544
Guillermo,
At those low speeds, you can use...
Guillermo,
At those low speeds, you can use a lower voltage. Depending on the Stepper Driver that you use, you could use a 15VDC or a 24VDC power supply. That will eliminate most of the heating....
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Forum: Motors & their mountings
Sun 18 March 2012, 09:51
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Replies: 278
Views: 281,544
With your pinion gear moving 2.953" per...
With your pinion gear moving 2.953" per revolution and a 7.2:1 gearbox, an axis would move 0.00020507" per step (assuming you use a Geckodrive stepper driver). That's 4876.3969 pulses per inch or...
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Forum: Motors & their mountings
Fri 18 February 2011, 06:17
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Sun 07 November 2010, 12:38
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Replies: 278
Views: 281,544
The 34HS9801 motor is rated 4A and 4.1 mH. The...
The 34HS9801 motor is rated 4A and 4.1 mH. The 4.1mH means that it can use up to 64VDC.
The Geckodrive G540 is rated at 3.5A and 50VDC. If you underrated the motors to 3.5A and 50VDC, then you...
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Forum: Motors & their mountings
Sat 11 September 2010, 10:01
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Replies: 278
Views: 281,544
The Oriental Motor PK296A2A-SGxx geared motors...
The Oriental Motor PK296A2A-SGxx geared motors are rated at 1.5mH when wired half-coil. The PK296-03AA motor and the PK296-F4.5A motor are also rated 1.5mH when wired half-coil. I regularly run the...
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Forum: Motors & their mountings
Sun 22 August 2010, 14:38
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Replies: 278
Views: 281,544
Mojo,
Let's review the basic requirements. ...
Mojo,
Let's review the basic requirements. The PK296A2A-SG7.2 motor from Oriental Motor is limited to 3A by Oriental Motor. That means that the Geckodrive G201, G201x, G202, G203v, G250, G251...
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Forum: Motors & their mountings
Sat 21 August 2010, 20:44
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Replies: 278
Views: 281,544
Mojo,
If you read Gerald's first post (27...
Mojo,
If you read Gerald's first post (27 October 2006), you'll find that his information is just a good today as it was when he wrote it. (I tried most of the links in that post and they still...
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Forum: Motors & their mountings
Tue 01 June 2010, 12:25
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Replies: 278
Views: 281,544
Andrew,
I don't want to discourage you...
Andrew,
I don't want to discourage you because I've never built or used a MechMate. When my Shopbot bites the dust, I'll most likely get busy and build a MechMate.
You might ask Gerald about...
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Forum: Motors & their mountings
Tue 01 June 2010, 05:00
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Replies: 278
Views: 281,544
Andrew,
A resolution of 0.00004-inch per...
Andrew,
A resolution of 0.00004-inch per step would require about 50:1 reduction. Did you mean 0.0004-inch (0.0003937)?
With a 4:1 belt-drive and a 1-inch diameter spur gear, you would get...
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Forum: Motors & their mountings
Mon 31 May 2010, 10:25
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Mon 08 March 2010, 06:09
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Fri 20 November 2009, 14:05
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Sat 26 September 2009, 07:51
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Replies: 278
Views: 281,544
580 N-cm = 5.8 N-m = 821 oz*in
"Holding...
580 N-cm = 5.8 N-m = 821 oz*in
"Holding torque" is the value that I normally use when checking a motor's torque. Holding torque is the amount of torque that the motor produces when the motor is...
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Forum: Motors & their mountings
Sun 13 September 2009, 12:05
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Replies: 278
Views: 281,544
You used a different set of calculations than I...
You used a different set of calculations than I use, but the end results were almost identical. I figured about 60V for the power supply and about 250 RPM when using a spur gear that had 1.25" pitch...
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Forum: Motors & their mountings
Mon 06 July 2009, 06:07
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Replies: 278
Views: 281,544
Francis,
The PK296A2A-SG7.2 has 1.5mH...
Francis,
The PK296A2A-SG7.2 has 1.5mH Inductance unipolar (or half-coil) and 6mH Inductance bipolar series. Inductance is 'caused' by the number of coils and how they are connected. Data sheets...
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Forum: Motors & their mountings
Fri 03 July 2009, 06:53
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Tue 19 May 2009, 09:46
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Tue 28 April 2009, 17:09
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Replies: 278
Views: 281,544
The data sheet for the MT34FN26 motor looks...
The data sheet for the MT34FN26 motor looks similar to the data sheet for the Oriental Motor PK296-F4.5. With about 450 oz*in of torque, it is a motor that I would normally use with a belt-drive...
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Forum: Motors & their mountings
Sun 01 March 2009, 11:37
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Replies: 278
Views: 281,544
Tim,
There is a huge difference in...
Tim,
There is a huge difference in performance between the PK296A2A-SGxx motor and the PK296A1A-SGxx motor. The A2A motors have lower inductance which means that they perform better at the...
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Forum: Motors & their mountings
Wed 28 January 2009, 08:26
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Replies: 278
Views: 281,544
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Forum: Motors & their mountings
Fri 23 January 2009, 06:09
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Replies: 278
Views: 281,544
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