MechMate CNC Router Forum

Go Back   MechMate CNC Router Forum > Common Assemblies & Parts > Motors & their mountings
Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
  #1  
Old Sun 10 January 2010, 17:10
Regnar
Just call me: Russell #69
 
Mobile, Alabama
United States of America
How much Torque is required when cutting?

I hope I am asking this in the right section but here we go.

I am looking at the Keling KL34H280-45-8A Stepper Motor,

http://www.kelinginc.net/KL34H280-45-8A.pdf
http://www.kelinginc.net/KL34H280-45-8AT.pdf

I am still in the planning stages but I would like to do a 3.1 to 1 belt drive with a 20 tooth pinion.

If I have done my math right I should end up with a almost 1:1 with the steppers rpm and 3 times the torque at rated speed.

Now for a few numbers, I would have

Stepper RPM-------Stepper Torque-- Pinion Torque--Table Speed(est)
150rpm------------594oz------------1841oz--------150ipm
300rpm------------580oz------------1798oz--------300ipm
600rpm------------509oz------------1577oz--------600ipm
900rpm------------410oz------------1271oz--------900ipm
1200rpm-----------311oz------------964oz---------1200ipm
1500rpm-----------254oz------------787oz---------1500ipm
1800rpm-----------198oz------------613oz---------1800ipm


This was all caculated from the torque/speed chart.

My question is will the torque and speed meet the Mechmates need with the above setup? I have never cut at a significant speed and dont have a clue what is required for cutting.

Would anyone object to this stepper motor and setup. In my mind it sounds good but then again what do I know.

Last edited by Regnar; Sun 10 January 2010 at 17:15..
Reply With Quote
  #2  
Old Sun 10 January 2010, 19:59
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Consider that a 20 tooth pinion which has a 20 diametral pitch has exactly a half inch radius. Therefore, a 613oz.in torque on a 20 tooth pinion is going to give you 1226 ounces of linear "pushing" force at the cutter, which is 76 pounds, which is plenty for a typical bit in a hand pushed router.
Reply With Quote
  #3  
Old Sun 10 January 2010, 22:32
Castone
Just call me: Leo #41
 
Soddy Daisy , Tn
United States of America
I have the 640 oz Keling steppers, with beltdrives. no problems so far and I am very happy with them.
Reply With Quote
  #4  
Old Mon 11 January 2010, 14:04
Regnar
Just call me: Russell #69
 
Mobile, Alabama
United States of America
Leo, are you running them 3 to 1 or are you doing a different setup. Thanks guys for the responses. I feel very comfortable with the mechanics but unsure of the electronics that need to be put in. Thanks again. Russell
Reply With Quote
  #5  
Old Mon 11 January 2010, 18:03
Castone
Just call me: Leo #41
 
Soddy Daisy , Tn
United States of America
Yes, I am using the 3 to 1
Reply With Quote
  #6  
Old Tue 09 March 2010, 07:43
kostis
Just call me: kostas
 
.
Falkland Islands (Malvinas)
Why beltdrives?

So, why do you use beltdrives in your machines?

I now build my 1mx2m cnc and I have 640oz-inch steppers with G203 and ballscrew 2510 and I plan to put them directly to ballscrews....If I put belt drive I will have decreased speed right?I do not want to decrease the speed...

Will I have any problem with this?

Kostis.
Reply With Quote
  #7  
Old Tue 09 March 2010, 07:49
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
Kostas, this forum generally only handles the specific MechMate machine design.

The answer to your question is that the MechMate uses rack and pinion, and thus gearing/belting down the motor makes sense. With a ballscrew, it wouldn't, since the ballscrew naturally does that. Whether you will have problems is a question for another forum, I think. Good luck with your build.
Reply With Quote
  #8  
Old Tue 09 March 2010, 08:00
kostis
Just call me: kostas
 
.
Falkland Islands (Malvinas)
Ok sorry then,
thanks for clearing this out Bradm...
Good luck to you too...
Reply With Quote
  #9  
Old Tue 09 March 2010, 11:21
oopz
Just call me: oopz
 
Stockholm
Sweden
Quote:
Originally Posted by bradm View Post
Kostas, this forum generally only handles the specific MechMate machine design.
bradm: So therefore a kind of --Back to basics -- Iv like to know how G540(+motors) and Linux has worked on your MM over time.
( Im a Mach3 and G203 person.) The reason why is simple I decided to go "THAT path - G540 and Linux" on one of the slanted machines Im building.

I know that its a learning curve on everything new thing you have to learn, so
" Lets Start NOW!! "
If you wounder in what build it will apear etc..Its this machine you can see grow in this moment taking its shape in my building three below.
http://mechmate.com/forums/showthrea...7&postcount=25

Feel free to answer either in the three above or here !

So if you have same advice or what to avoid etc or likewise let me know.

/oopz
Reply With Quote
  #10  
Old Wed 23 June 2010, 23:10
eesanopi
Just call me: Edgar
 
Morelos
Mexico
Quote:
Originally Posted by Castone View Post
I have the 640 oz Keling steppers, with beltdrives. no problems so far and I am very happy with them.
Leo, I have this motors too, but not running yet, how fast they can perform with 3:1 reduction?

Edgar
Reply With Quote
Reply

Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drawing problems and revisions required, considered and intended . . . . . Gerald D General - MM Build 55 Sat 23 March 2013 05:48
Flexible Hose required in India DMS 55. Dust Management 9 Wed 16 September 2009 06:22
Same torque, different sized frame chrisd7306 Motors & their mountings 5 Wed 19 November 2008 02:25
Required Torque for possible upgrade ?? boutzo869 Archives 4 Wed 22 October 2008 08:04
How many laser profile cut components required per part number? fabrica Profiled (laser cut) & bent steel plate 29 Mon 07 January 2008 12:32


All times are GMT -6. The time now is 10:27.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.