Connecting the limit switches on the redLeaf use the input pins on the parallel breakout board. Here is a link to the wiring diagram for that parallel breakout board.

https://buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay#prettyPhoto/2/

The connection is simple. Just create a circuit from ground to the pin. When the pin is engaged, the circuit is closed (using normally open on the switch). Use mach3's autoset to automatically set the pin for the limit or home setting.

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Do you guys have any videos showing how to connect limit switches to a redleaf? If not, could you please make one? I looked at the diagrams on the limit switch page but I don't understand them.

You would use a combination of bearings and collars to prevent your lead screw or rod from being able to move back and forth. Without it being able to move back and forth, you shouldn't have the couplings coming apart, because the motor is solidly mounted and unable to move as well.

I will try to draw a picture using symbols, with a key to define what each part is.

--CB|--------------|BC}{M

- = Lead Screw or Rod
C = Collar
B = Bearing
| = Wood, the frame of your machine
}{ = Coupling
M = Motor

On the example above you could replace the collar on the motor side with one half of the coupling, putting it right upside of the bearing to hold it in place instead. Like this:

--CB|--------------|B}{M

You could also place the bearings on the inside as follows:

----|BC----------CB|--}{M

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can you please specify how to connect the collar/nut and bearings to prevent the axial movement of lead screw. Do I have to put that next to the stepper motor /coupling assembling or on the other side where the lead screw comes out. Or is there any way I can make the flexible coupling rigid so it does not come out of the middle spider?

The maximum length we can ship is a total of 78" inches. However we can send your required length in portions. Please refer to adding the total items you require to your cart to get a visualized amount and shipping cost.

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Regarding 1/2" 5 start and 10 TPI ACME precision lead screw, what the maximum length you can ship within USA? I'm looking for something like 100" and I could use a 1" screw if available. Please include estimated price. Thanks.

Not sure what you mean by the statement "I don't know when you answer". Please explain. I answer all of the incoming emails until my inbox is completely empty and all phone calls to the company go straight to my cell phone and I answer all of the calls, and if I don't answer, I call back immediately.


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I just searched my email and found no emails with your email address associated with the email listed with this question. I cannot answer questions if no correspondence was provided by you.

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Please send an email, I am giving up on buying a machine from you because I don't know when you answer. I was asking about getting just the working parts and rails sent to Fiji. You sent an answer and some questions, but I have no way of knowing if you responded again.

The formula for finding the steps per mm is found in the units itself. First, you mentioned that the motor is a servo. This needs to be clarified as a servo is different than a stepper motor. Some servos behave similar to a stepper motor, so I will continue with this in mind.

The formula is (steps/mm):

You need to find the steps. The stepper motor has a natural number of steps per a full revolution. This is typically 200 steps per revolution.

The driver for the stepper motor allows you to increase the number of steps per revolution by adding a specified number of steps between each step. For instance, if you set the driver to 1/4 microstepping, then instead of having 200 steps per revolution, you would have 200 x 4 = 800 steps per revolution.

So now we have the first part of the formula:

Steps / mm = (200 x 4) / mm

Lets determine the mm side of the formula:

You mention that the pitch is 0.5 mm. Check to insure that the lead is also 0.5 mm. This could be a multiple start lead screw where the pitch is different than the turns per mm. If in this case, that the 0.5 mm is the travel for one full revolution, then you can simply plug this into the formula as:

mm = .5 mm

Otherwise, determine how fat the travel is for one complete revolution.

Therefor, with what we know and the driver is set at 1/4 microstepping and the stepper motor has a natural step count per revolution at 200:

steps / mm = (200 steps x 4) / 0.5 mm = 800 steps / 0.5 mm = 1600 steps / mm

If your travel for one revolution is not 0.5 mm, then plug in your travel distance instead.



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i know about steps/mm calculation for stepper motor, because i am using servo motor that why i asked about that. please tell for servo motor.

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because its my first time with servo motor i have no idea about calculation of parameter with servo.

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Have you attempted to contact the manufacturer or seller of the servo? We typically respond to customers of our products on this customer service area, unless we have extensive knowledge of the subject and can answer the question efficiently.

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hello there, i am using servo motor for my X and Y Axis but i dont know how to calculate steps/mm for that, the lead screw i am using is have pitch of .5 mm. please helpme on this i have done everything only this point is pending.

Dealing with running our CNC machines with roller chain on the X/Y-axes and lead screw on the Z-axis, we chose this method due to functionality and cost effectiveness. We wanted to make the lowest cost CNC machine available for our customers without taking to much functionality and precision away from the machine. We wanted the accuracy and cost effectiveness to be surprisingly high, with our machines getting thousandths of an inch will be no issue, and having it at a decent price!

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Hey. I have noticed that you guys use roller chain to move x,y axis and a lead screw to move the z axis, can you please explain the motivation in short? Thank you.

Yes. We will make sure the lead screw is cut to those dimensions. 53/30/13

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I ordered 96 inches of the 1/2 inch 10 tpi drive screw. I need it in 3 pieces. 53 inches, 30 inches, and 13 inches. Please let me know if that can happen. Thankyou

Sure, let me check.

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Your order was shipped out on Tuesday (10/20/2020). I noticed that your email was not stored in the customer record when the order was made. I will send you the tracking number via email now.

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Placed an order for the cable set for the Pokeys57cnc interface on 10/20 but it is not showing up in My Account as being ordered. It was charged to my credit card and I have not had any info that it was received by you.

I just looked at your account and noticed that your shipments has not been made yet. I will talk to the shipper tomorrow morning when the office opens determine what happened. My apologies for this.

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I ordered a 1.5kW Spindle and Inverter (110 Volt) on December 18th and have heard nothing since. I notice you did charge my credit card for the purchase. Please update me with an ETA as soon as possible.

Use a clamping collar (if you are using an ACME lead screw) or a couple of 1/2 nuts (if using an allthread) against the bearing to keep the bearing in place and make sure there is no axial play.

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How do I secure the non-motor end of the lead screw for my 'Book' machine build? Does it just sit inside the bearing or do i use a nut to lock it in place? I did not see any instructions for this in the book.

We apologize for the confusion, however in the very first video that is regarding the assembly, is of the torsion box. We do not included that in any greenBull kit, as we use too sell it individually! However due to high consumption of materials and high cost(both in shipping and for the kit itself) we have removed it from our inventory and no longer sell it.

This video can be skipped, however if you plan on making a DIY torsion box, this video will be helpful in your build!

The torsion box is not needed, as the frame itself will be more than sufficient in keeping the machine from flexing or vibrating.

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I ordered the GreenBull 5' x 10' kit. The first video for assembly shows that I should have 5 large boards that attach to the table, but I don't have those boards. Is that something I need to build or were they not shipped?

Once your place an order you should receive an confirmation email automatically. If you did not receive it please check if you entered your email address correctly or if it may have gone to a junk/spam folder. Generally with certain items we specify a lead time and once orders are ready to ship you will be automatically notified with an shipment notification email, assuming your email address was correctly entered. If you have any questions pertaining to orders please contact sales@buildyourcnc.com

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I ordered a WhiteAnt on Dec 5 (saturday). I have never received an order acknowledgement nor a shipping date, but my credit card has been charged. I don't think that is usual. Can you provide an update, please?

That order did not show up in our system. We searched and found it in our PayPal activity. We are sending it today. My apologies for this.

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I received my order, thank you. However the collet nut will not fit my Porter Cable 690, the threads are too coarse. Can you please send the correct nut, and I will return the wrong nut.
Thank you,
Tom

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I believe the wrench is different also.

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Ok. I will send the correct wrench and collet nut.

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It’s Monday 11-16, and I have not received the nut and wrench. Have you shipped it yet?

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Let me check.

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The set of collets and nut/spanner came straight from the supplier PreciseBits. I am working to understand what went wrong and get it resolved.

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Do you have any new info on the status?

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It’s now Dec 2nd, I ordered this on Oct 7th. No resolution yet! Still waiting, Not very happy.

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I ordered a collet set for a Porter Cable router on 10/7, my card was charged on 10/8. I have not heard anything from you as to when it would ship, or even a confirmation of the order. Please let me know the status.

I just sent you the commercial invoice via email. Thanks.

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Could you please e-mail us the invoice for the order, shipment is currently at the customs and your invoice is needed so it can be cleared. As I can't seem to find any order number or other reference in your system, the only reference I have is the tracking number LZ676176940US and the order date is 12/26/2017. Thanks!

If you want speed control, it is recommended to use the RS-485 connection on the VFD and use the control program such as Mach3 to communication serially with the VFD using this RS-485 connection.

If you would rather use a controller such as the PMDX-107 to simulate the effect of a potentiometer using the Aref, Aout and Agnd and the Rev/Dir and Fwd/Run terminals to control operation and direction, you can connect those to the VFD.

PMDX-107 Aout connects to the VI (analog voltage in). This is like the wiper on a potentiometer.
PMDX-107 Agnd connects to the ACM terminal on the VFD for Analog common.
PMDX-107 COM connects to DCM terminal on the VFD for Digital common.
PMDX-107 Fwd/Run connects to the FOR terminal on the VFD for Forward.
PMDX-107 Rev/Dir connects to the REV terminal on the VFD for Reverse.

Refer to your PMDX-107 manual to correctly configure your dip switch settings and make sure to calibrate (tweak) the speed control using the trimmer next to the terminals on the PMDX-107.

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I purchased the 4.0kw spindle and VFD a while back, and have just installed a PMDX-107 controller... do you have any examples of the wiring connections for the SL-240EE to PMDX-107?

We just received our new inventory of motors and that specific stepper motor ski came back with only one shaft. I’m not at the office to look at this inventory, so if that is true, they will all be single shaft. We may have other stepper motors with included rear shafts, but I will have to see on Monday.

If I don’t have the double shaft, we will provide a refund upon receipt of the motors. My apologies for this error.

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Hi, I'm sending these motors back today. As I understand you, you might have some motors from the previous lot still in stock, and these would be double shaft but otherwise you don't have any and won't be getting any. If you do have two double shaft versions of this motor please send them; if you don't have two of them please let me know--today if possible--so I can start looking elsewhere. Thanks, Ted Armen

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we just received two nema 11 stepper motors per our order--USR2-2, however they are single shaft, we need double shaft, I thought that's what we ordered. We're sending them back, let me know if you do have the double shaft version and I'll try again to order them. I notice the model number on the motor ends in "A", where the packing slip shows "B".

I will send two 8mm to 1/2" couplings to you ASAP. Please send an email to customerservice@buildyourcnc.com so I can determine to whom to send the couings. Thanks.

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Please notice, I followed up with several emails abut this situation. In one, I corrected the motor shaft sizes to 10mm. I understand that, as a result of my emails, the original 1/4" x 1/2" couplers were sent and apparently received by someone at the wrong address. As of this time, I have received no couplers of any size and have gotten no reponses to my emails. Can you enlighten me?

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I looked all throughout my email and I cannot find an email from you. Please send an email to phooddaniel@gmail.com so I can determine who this is and to whom I need to send the new couplings. Thanks

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I ordered two NEMA 23 steppers with 1/4" shafts, I received motors with 8mm shafts. I also ordered two 1/4" x 1/2" couplers, which I have not received. I have no problems with the motors, but I will need couplers to match the 8mm shaft to 1/2" lead screw.

BYCNC response:

Milling aluminum is no problem with our machines.

Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

For the dimension drawing of the anti-backlash nut, please contact us directly by phone or email to techsupport@buildyourcnc.com

User response:
I have emailed waiting for your reply.

User response:
Hi, I am still waiting for your email reply.

BYCNC response:
Your email has been sent.

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HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

BYCNC response:

Milling aluminum is no problem with our machines.

Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

For the dimension drawing of the anti-backlash nut, please contact us directly by phone or email to techsupport@buildyourcnc.com

User response:
I have emailed waiting for your reply.

User response:
Hi, I am still waiting for your email reply.

BYCNC response:
Your email has been sent.

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HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?