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Forum: 702. Power Supplies Sat 27 June 2015, 06:55
Replies: 134
Views: 158,673
Posted By Richards
Bazza, Mike's (Metalhead) advice is good advice. ...

Bazza, Mike's (Metalhead) advice is good advice. Using the 34HS9802 motor with a 48V power supply will give you 580 oz*in of holding torque without a belt-drive and 2,320 oz*in with Metalhead's 4:1...
Forum: 702. Power Supplies Tue 04 February 2014, 16:06
Replies: 134
Views: 158,673
Posted By Richards
Let's be careful about recommending things. As...

Let's be careful about recommending things. As far as I have found, Ros did not specify which motors he wants to use. Maybe that information is on another thread, but I didn't see it in his...
Forum: 702. Power Supplies Mon 03 February 2014, 09:45
Replies: 134
Views: 158,673
Posted By Richards
Ros, I'm not sure what the question is, but...

Ros,

I'm not sure what the question is, but perhaps I can suggest a methodology that might help you find an answer.

You'll need some tools on your test bench. You'll need a voltmeter, an...
Forum: 702. Power Supplies Tue 13 August 2013, 08:21
Replies: 134
Views: 158,673
Posted By Richards
I will donate four used 23-size Oriental Motor...

I will donate four used 23-size Oriental Motor PK268-02A motors to anyone who wants to build a 3:1 to 7.2:1 belt-drive if you pay the shipping costs. The motors are in excellent condition, but they...
Forum: 702. Power Supplies Sat 10 August 2013, 15:59
Replies: 134
Views: 158,673
Posted By Richards
Brad, If you think that I'm a troll, please...

Brad,

If you think that I'm a troll, please contact Mike (Metalhead) and complain. I've told him that if he asked me to leave the forum that I would honor his request. His response was both kind...
Forum: 702. Power Supplies Sat 10 August 2013, 12:07
Replies: 134
Views: 158,673
Posted By Richards
Brad, You've made a very good point. ...

Brad,

You've made a very good point.

What voltage would you suggest for someone using a Leadshine stepper driver and a non-Orientral Motor stepper motor? Many people are not using...
Forum: 702. Power Supplies Sat 10 August 2013, 09:44
Replies: 134
Views: 158,673
Posted By Richards
The personal attacks are overshadowing the data. ...

The personal attacks are overshadowing the data. Does anyone really think that the electrical engineers at Oriental Motor and Mariss Freimanis of Geckodrive are artificially limiting the usefulness...
Forum: 702. Power Supplies Fri 09 August 2013, 09:00
Replies: 134
Views: 158,673
Posted By Richards
Okay Gerald, have it your way. Meanwhile, those...

Okay Gerald, have it your way. Meanwhile, those who follow Mike's (Metalhead) suggestion to use a properly sized motor with a belt-drive will never need to exceed maximum voltage or tweak current to...
Forum: 702. Power Supplies Fri 09 August 2013, 06:49
Replies: 134
Views: 158,673
Posted By Richards
Gerald, You know that I use a 500VA...

Gerald,

You know that I use a 500VA transformer on my bench when I'm testing four motors. I use a 250VA transformer when I test single motors. You recommend a 300VA transformer for use with four...
Forum: 702. Power Supplies Thu 08 August 2013, 13:09
Replies: 134
Views: 158,673
Posted By Richards
Gerald, In a 3-D cut, all three motors are...

Gerald,

In a 3-D cut, all three motors are primary motors. They all move more frequently and for shorter distances than when cutting 2-D. In a 2-D cut, usually, the Z-axis goes to depth and then...
Forum: 702. Power Supplies Thu 08 August 2013, 08:41
Replies: 134
Views: 158,673
Posted By Richards
Gerald, You posted while I was responding to...

Gerald,

You posted while I was responding to Ken. I agree that the Z-axis on your machine should run the coolest because it would normally be handling the lightest load. Of course heavy cuts...
Forum: 702. Power Supplies Thu 08 August 2013, 08:15
Replies: 134
Views: 158,673
Posted By Richards
Ken, Thanks for the quick response. As you...

Ken,

Thanks for the quick response. As you said, your Z-axis is lightly loaded so it won't draw much current.

If I've done the math correctly, a 24mm pitch diameter gear would move an axis...
Forum: 702. Power Supplies Thu 08 August 2013, 06:57
Replies: 134
Views: 158,673
Posted By Richards
Ken, What motor do you use on your Z-axis...

Ken,

What motor do you use on your Z-axis and what is the gear ratio on your Z-axis? You wrote that you're using a ball-screw. Two popular screws from Automation4Less have pitches of 5mm per...
Forum: 702. Power Supplies Tue 06 August 2013, 16:51
Replies: 134
Views: 158,673
Posted By Richards
There are several "unknowns" in the use of the ...

There are several "unknowns" in the use of the 86HS9801 motors used with a Leadshine stepper driver. Geckodrive published the formula for use with Geckodrive stepper drivers. No one should assume...
Forum: 702. Power Supplies Thu 10 May 2012, 05:32
Replies: 134
Views: 158,673
Posted By Richards
VA = AMPS * (VDC * (1 / (SQRT(2))) So, 15 A...

VA = AMPS * (VDC * (1 / (SQRT(2)))

So, 15 A * 65VDC * ( 1 / (SQRT(2)) = 15 * (65 * (0.7071)) = 750 VA

The AC volts rating is used, not the DC volts rating. The large filtering capacitors...
Forum: 702. Power Supplies Sat 25 February 2012, 14:49
Replies: 134
Views: 158,673
Posted By Richards
Thanks Danilo for catching my oversight. I...

Thanks Danilo for catching my oversight. I looked at the KL23 Nema 23 motor and my mind played tricks on me (again). I thought that I was looking at a Nema 34 motor.

A size 23 motor can be used,...
Forum: 702. Power Supplies Sat 25 February 2012, 08:23
Replies: 134
Views: 158,673
Posted By Richards
On the KL-4030 data sheet is says: "Suitable for...

On the KL-4030 data sheet is says: "Suitable for a wide range of stepping motors of Nema 17 and 23". The motor that you've specified is a large Nema 34 motor.

The calculations that we normally...
Forum: 702. Power Supplies Thu 19 August 2010, 04:00
Replies: 134
Views: 158,673
Posted By Richards
Ries is correct in suggesting to put some power...

Ries is correct in suggesting to put some power supplies in SERIES. I often put two 24VDC switching power supplies in series to get 48VDC. Three 24 VDC power supplies in series would give you...
Forum: 702. Power Supplies Wed 18 August 2010, 09:40
Replies: 134
Views: 158,673
Posted By Richards
Mongkol, Twenty-four volts would make the...

Mongkol,

Twenty-four volts would make the motors turn, but you wouldn't get very much speed. Usually the speed of the motor is mostly affected by the power supply's voltage and the torque is...
Forum: 702. Power Supplies Mon 16 August 2010, 20:58
Replies: 134
Views: 158,673
Posted By Richards
Mongkol, The inductance of the motor...

Mongkol,

The inductance of the motor determines the voltage that you can use. 15mH inductance lets you use up to 123VDC. The Geckodrive stepper drivers can only handle 80VDC, so you would use a...
Forum: 702. Power Supplies Wed 11 February 2009, 16:20
Replies: 134
Views: 158,673
Posted By Richards
Jed, Remember that the 34HS9801 is rated 4A...

Jed,

Remember that the 34HS9801 is rated 4A per motor. You will need to limit the current to 3.5A or lower by using a 3.5K or lower value resistor. So, 3.5A X 4 motors = 14A and 14A * 35VAC =...
Forum: 702. Power Supplies Wed 11 February 2009, 06:24
Replies: 134
Views: 158,673
Posted By Richards
Jed, The 500VA will work fine. As you said,...

Jed,
The 500VA will work fine. As you said, the G540 will only draw as much current as it needs, so the extra capacity will not be used. I'm doing almost the same thing. I have a 500VA 25+25...
Forum: 702. Power Supplies Sat 25 October 2008, 20:15
Replies: 134
Views: 158,673
Posted By Richards
I've been running some heat tests on an Oriental...

I've been running some heat tests on an Oriental Motor PK299-F4.5 motor wired Bipolar Parallel connected to a Gecko G203v stepper driver. The current limit resistor is 220K, which limits the current...
Forum: 702. Power Supplies Wed 08 October 2008, 17:33
Replies: 134
Views: 158,673
Posted By Richards
Gerald, Thanks for posting the thread where you...

Gerald,
Thanks for posting the thread where you listed the 300 VA, 28VAC to 30VAC suggestion. I knew that I'd read it, but obviously I didn't look far enough.

Your suggestion on transformer size...
Forum: 702. Power Supplies Wed 08 October 2008, 12:01
Replies: 134
Views: 158,673
Posted By Richards
Here's an OpenOffice Calc spreadsheet that...

Here's an OpenOffice Calc spreadsheet that computes the maximum power supply voltage for a motor based on the inductance of the motor. It computes the capacitance that you'll need when using four...
Showing results 1 to 25 of 25

 
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