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  #151  
Old Tue 29 June 2010, 09:16
fanefane
Just call me: Stefan #73
 
Baia Mare
Romania
John, you can look here for stepper motors and drivers http://www.driver-motor.com . They have good prices and fast shipping through DHL.
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  #152  
Old Sun 03 April 2011, 17:21
David Bryant
Just call me: David #99
 
Western Australia
Australia
Hi
I have four 34HS9801-G5 MotionKing stepper motors
I have been trying to work out why my mech mate does not move the correct distance(accordind to theory). So I put a signal generator onto the step input and measured the time for a number of revolutions using the MotionKing driver. (tried DC supply and AC supply to MotionKing Driver, no difference)
I always needed 17/16 more pulses than theory said I needed.
I changed to a gecko drive and repeated the test with a bench power supply and wiring direct to the motor. Still needed 17/16 times more pulses than the expected 200 steps at the motor X 5 for the gear ratio.

My conclusion is that the gearbox is not exactly a 5:1 ratio.
I have not seen any other problems with the motor or drive.
Cheers
David
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  #153  
Old Sun 03 April 2011, 22:05
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
David, interesting discovery with that Motionking gearbox...have you asked MK to confirm the ratio?
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  #154  
Old Mon 04 April 2011, 02:45
David Bryant
Just call me: David #99
 
Western Australia
Australia
Hi Gerald

There answer was:
We are having Tomb-Sweeping Day holidays from Apr-03 ~ Apr-05(Sun ~ Tue). Your email will be read & replied after holidays.
So maybe next week
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  #155  
Old Mon 04 April 2011, 03:55
KenC
Just call me: Ken
 
Klang
Malaysia
I bet 99% of you will be puzzles by this Tomb sweeping thingy

They meant they are observing the Qing Ming Festival, it is the time of the year on Chinese lunar calendar dedicated for visiting ancestral cemetery. Cleaning & sweeping the tombs is standard operating procedure

Its like a big family picnic, where all the family members gather at the cemetery, after the prayer, we will have a big feast & free flowing of choice beverage.

I'll be doing my part tomorrow.
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  #156  
Old Thu 07 April 2011, 01:23
David Bryant
Just call me: David #99
 
Western Australia
Australia
Answer from Motion King
Dear David Bryant,

It's 1/5.32.



Thanks & Best Regards!

Media Lee (Mr)
==============================

MotionKing Motor Industry Co.,Ltd.
http://www.MotionKing.com
sales@MotionKing.com
Tel: 0086-519 8988 6261
Fax: 0086-519 8515 1172
===============================
2011-04-07

So Off to get the calculator out to see if I get it right..........
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  #157  
Old Thu 07 April 2011, 03:05
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
There maywill be more decimals after the 5.32****

Last edited by Gerald D; Thu 07 April 2011 at 03:09..
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  #158  
Old Thu 07 April 2011, 04:07
David Bryant
Just call me: David #99
 
Western Australia
Australia
We must think alike 25:133
took me a while.
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  #159  
Old Thu 07 April 2011, 05:05
David Bryant
Just call me: David #99
 
Western Australia
Australia
Got the new value installed 87.402 pulses per mm.

As close as I can measure with a rule so onto more testing and setups.

Thanks for the input.
David
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  #160  
Old Thu 07 April 2011, 08:56
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Do you have a specsheet or dimensions on that motor/gearbox? I am curious whether the reduction is by a single pair of gears (25:133) with output shaft well offset, or whether there is an intermediate shaft with 2 pairs of gears, with less of an offset.

A single pair would theoretically be the better option with less chance for backlash and less friction. (OM motors have intermediate shaft and 2 gear pairs).
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  #161  
Old Tue 12 April 2011, 00:23
David Bryant
Just call me: David #99
 
Western Australia
Australia
Hi Gerald
The output shaft is so close to the edge I assume that there will be an intermediate shaft.
Just been fighting with image resolutions and adding photoes.
I think it has been attached...
Ps the adjustable z Limit proxy and target can be seen in the photoes.
Cheers
David
Attached Images
File Type: jpg IMG_0355sm.jpg (54.5 KB, 600 views)
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  #162  
Old Tue 12 April 2011, 00:27
David Bryant
Just call me: David #99
 
Western Australia
Australia
AH HA The second photo was vertical so was tripping on max size..
Attached Images
File Type: jpg IMG_0356smaller.jpg (39.0 KB, 598 views)
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  #163  
Old Tue 12 April 2011, 09:56
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
I like your placement of the Z limit proxy. I bet there is about .020 clearance between that adjustable flag and the spider. Nice work.

Sean
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  #164  
Old Sat 20 October 2012, 02:37
sensei
Just call me: lubo
 
varna
Bulgaria
Hello Sir,

Thank you for your inquiry about our cnc parts, we'd like to make the best offer as below:

1, 86HS9801 stepper motor: USD48.00/pc. x 4 pcs = USD192.00
2, DM856 stepper driver: USD65.00/pc. x 4 pcs = USD260.00 (DM556 stepper driver: USD58.00/pc. x 4 pcs = USD232.00)
3, Timing pulley 15XL: USD9.00/pc. x 4 pcs = USD36.00
4, Timing pulley 72XL: USD26.00/pc. x 4 pcs = USD104.00
5, Timing belt 300-XL-10 (length-XL-width): USD4.00/pc. 4 pcs = USD16.00
6, HF spindle DTS-23: USD238.00/pc x 1 pc = USD238.00 (HF spindle DTS-27: USD800.00/pc x 1 pc = USD800.00)
7, ER20 collect chuck: USD6.00/pc x 3 pcs (each size is ok) = USD18.00

The leadtime for the production is about 3 weeks.

As for the stepper diver, if you would work it with 86HS9801 stepper motor in high speed, it's recommended to use DM856 as the voltage is higher so the motor can run stable at high speed.

Also for the HF spindle, it's depends on how much power you need, because DTS-23 is 2.2KW and DTS-27 is 4.5KW, if 2.2KW is enough for you, DTS-23 is ok because it's the most pupular sale spindles.

To ship above quantity by DHL to you, the shipping is about USD191.00, with driver DM856 and spindle DTS-23 selected.

Also we have seashipment to Holland every month, if USD191.00 is too high, we can ship the goods by sea to our Holland office first, and then our Holland office send those goods to you by truck, guess that's much cheaper.
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  #165  
Old Sat 20 October 2012, 02:38
sensei
Just call me: lubo
 
varna
Bulgaria
This above is offer sent to me yesterday from http://www.driver-motor.com
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  #166  
Old Sat 20 October 2012, 02:44
sensei
Just call me: lubo
 
varna
Bulgaria
34HS9801 = 86HS9801 they are the same
www.driver-motor.com/ProductContent.aspx?ID=47
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  #167  
Old Sat 20 October 2012, 19:11
David Bryant
Just call me: David #99
 
Western Australia
Australia
Hi Lubo
I have four 34HS9801-G5 MotionKing stepper motors as shown in photos above. These have built in gearboxes 5.32 to 1 ratio as discussed above.
I have had no failures so still have not pulled one apart.
Little backlash.
ran 5 hours yesterday cutting 10mm thick Aluminium.

Cosider a full set of collets. (My local shop charges about $26USD each)
Consider a spanner to suit collet
Cheers
David
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