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Forum: 702. Power Supplies Sat 27 June 2015, 06:55
Replies: 134
Views: 40,284
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: 701. Motor Drives Sun 17 May 2015, 11:20
Replies: 17
Views: 6,175
Posted By Richards
Ken, It looks like you're in Malaysia. I...

Ken,

It looks like you're in Malaysia. I don't know what Oriental Motor motors cost over there. Here in America, the 34-frame size, 350-450 oz*in motors cost $135 each, postage paid by Oriental...
Forum: 701. Motor Drives Fri 15 May 2015, 11:33
Replies: 17
Views: 6,175
Posted By Richards
I like Oriental Motor because I've used over 100...

I like Oriental Motor because I've used over 100 of their motors with no motor failures and only one driver failure. I've also tested Leadshine and found that motor to be just as smooth, just as...
Forum: General - MM Build Wed 25 March 2015, 09:39
Replies: 3
Views: 1,985
Posted By Richards
Read the posts under the "Electrical and...

Read the posts under the "Electrical and Electronic" section. You should find enough information to get started on your project. The electronics used with Mach 3 will work with a lot of different...
Forum: 701. Motor Drives Fri 16 January 2015, 12:22
Replies: 1
Views: 1,613
Posted By Richards
Geckodrive announced the GM215 stepper motor drive

Geckodrive recently announced that their GM215 stepper motor driver is now available for about $250 U.S. If has a lot of features that are not needed on a CNC machine, but it has "sub microstepping"...
Forum: 701. Motor Drives Sat 13 December 2014, 11:12
Replies: 0
Views: 1,492
Posted By Richards
Use Arduino Uno to test stepper drivers and stepper motors

I'm attaching an Arduino sketch (program) that you can use with an Arduino Uno to test your stepper drivers and stepper motors. This program requires that you have a power supply connected to the...
Forum: General - MM Build Thu 21 August 2014, 11:01
Replies: 16
Views: 5,144
Posted By Richards
Look at the way ball-screws are used on a...

Look at the way ball-screws are used on a Thermwood. Vibration is kept to a minimum. I'm sure that Thermwood has a patent, but I'm not sure how patents pertain to home-use, home-built equipment. A...
Forum: Introduce yourself and start planning Tue 12 August 2014, 08:27
Replies: 28
Views: 5,395
Posted By Richards
We'll need a little more information before being...

We'll need a little more information before being able to help you test your motors. Are they hooked up to the stepper drivers? Are the stepper drivers connected to the power supply and to the PMDX...
Forum: 70. Control Systems Tue 29 July 2014, 08:07
Replies: 29
Views: 5,789
Posted By Richards
All the stepper motors that I've ever used...

All the stepper motors that I've ever used "resonate" (growl) when they're run at a low speed where the "resonating" happens. The cure is to run them faster or slower. Usually the "resonating"...
Forum: MechMates already cutting Sat 21 June 2014, 21:13
Replies: 382
Views: 48,790
Posted By Richards
Steve Stallings at PMDX designs break-out boards...

Steve Stallings at PMDX designs break-out boards properly. He uses a 10k pull-up resistor on critical inputs. His 10k plus an external pull-up is equal to 5k, which is very close to the 4.7k value...
Forum: MechMates already cutting Fri 20 June 2014, 17:19
Replies: 382
Views: 48,790
Posted By Richards
Pete, I'm sorry about the quality of the image....

Pete,
I'm sorry about the quality of the image. I use Eagle, which exports the image. As far as I know, there are no controls to darken the image. The resistors on the diode side should be sized...
Forum: MechMates already cutting Fri 20 June 2014, 12:10
Replies: 382
Views: 48,790
Posted By Richards
Fox, I agree that your schematic will work, but...

Fox,
I agree that your schematic will work, but I also know that it will not work forever. Thirty-nine years of experience building process control computers lets me know that attaching multiple...
Forum: MechMates already cutting Thu 19 June 2014, 09:00
Replies: 382
Views: 48,790
Posted By Richards
Here's a schematic that shows the use of...

Here's a schematic that shows the use of opto-couplers that have PNP (sourcing) inputs. The 7408 chip shows how I would connect the 4N27's outputs. Each output goes to a single input. On the 7408,...
Forum: MechMates already cutting Wed 18 June 2014, 06:09
Replies: 382
Views: 48,790
Posted By Richards
A 4N27 can sink very little current. It's rated...

A 4N27 can sink very little current. It's rated at about 30% efficiency, which means that if you size the resistor on the diode side to allow 10mA to pass, the transistor side will only sink about...
Forum: MechMates already cutting Mon 16 June 2014, 08:54
Replies: 382
Views: 48,790
Posted By Richards
All grounds should be connected together. In...

All grounds should be connected together. In other words, don't isolate one power supply from another.

Solid State Relays require a minimum load to work properly. If the load is too light, they...
Forum: Miscellaneous / General / Whatever / Catchall Sun 25 May 2014, 07:30
Replies: 14
Views: 4,349
Posted By Richards
Use OpenOffice Calc or some other spreadsheet...

Use OpenOffice Calc or some other spreadsheet program and do a Break Even Analysis (look it up on the Internet) on your business. A Break Even Analysis will show you how many "widgets" you must...
Forum: Introduce yourself and start planning Sun 27 April 2014, 15:37
Replies: 17
Views: 3,347
Posted By Richards
The entire project will cost close to $6,000,...

The entire project will cost close to $6,000, depending on the electronics that you chose and some of the bells and whistles. Spending $100 to get the latest plans is the best investment that you...
Forum: 702. Power Supplies Tue 11 March 2014, 08:31
Replies: 18
Views: 12,069
Posted By Richards
Andrew, Normally ALL grounds are connected...

Andrew,

Normally ALL grounds are connected together. Ground is the reference point from which all voltages are measured. In other words, if the grounds are all connected, the 24VDC DIN rail...
Forum: 702. Power Supplies Tue 04 February 2014, 16:06
Replies: 134
Views: 40,284
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: 40,284
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: Construction started, but not cutting yet Mon 09 December 2013, 10:07
Replies: 65
Views: 14,587
Posted By Richards
The wiring diagram posted on November 30 is...

The wiring diagram posted on November 30 is incorrect if the 4-wire diagram is used (assuming that the diagram for the 8-wire connection is correct).

I don't have a 34HS9801 motor, so I can't tell...
Forum: Miscellaneous / General / Whatever / Catchall Mon 09 December 2013, 09:00
Replies: 4
Views: 1,956
Posted By Richards
I tell every business owner to run a "break-even...

I tell every business owner to run a "break-even analysis" spreadsheet to see how many "widgits" they have to sell to make a profit. A "break-even analysis" enables them to easily modify the cost of...
Forum: 70. Control Systems Thu 07 November 2013, 06:37
Replies: 9
Views: 2,830
Posted By Richards
On the G203v, COMMON is GROUND, so the Step...

On the G203v, COMMON is GROUND, so the Step signal pulse is +5vdc. The Direction signal is a steady +5v for one direction and a steady 0v for the other direction. You'll probably find that +2.5vdc...
Forum: 70. Control Systems Wed 06 November 2013, 17:54
Replies: 9
Views: 2,830
Posted By Richards
There are two issues to consider. COMMON on the...

There are two issues to consider. COMMON on the G203v is GROUND. COMMON on the G201 and G202 is +5V. You're using the G203v, so COMMON is GROUND. If all power supplies have a common GROUND (the...
Forum: MechMates already cutting Wed 06 November 2013, 09:59
Replies: 49
Views: 6,318
Posted By Richards
Can you connect a dial indicator to your Z-axis...

Can you connect a dial indicator to your Z-axis and then make repeated small moves? If the indicator is positioned so that the plunger is always partially depressed, you'll be able to see if the...
Showing results 1 to 25 of 500

 
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