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Question #: 891

Question: What's the maximum speed at I can machining reliefs without lost steps with BlueChick?

Current Solution

This will depend on the material, end mill that you are using, and whether you are using a spindle or a router. The stepping motors and the mechanics on the blueChick (and the other machines as well) can move the machine very fast (x and y about 700 ipm rapids).

You will need to refer to the manufacturer specifications for the speed on the end mill with the particular material. The Onsrud end mills sold here are of top quality and can generally go faster than standard end mills. If the reliefs are in wood, you will be able to machine around 200 to 80 ipm depending on the wood and the depth per pass. Generally, you want to rough out most of the wood with a roughing end mill then finish off with a finishing end mill with a small tip and a small step over.

If you are using a router, the speeds will be slower than a spindle since the spindle can handle more torque and the torque is compensated with the VFD (Variable Frequency Drive).

Respond:

Other Possible Solutions to this Question

• If I am cutting 18mm MDF with 6mm cutting bit (so 6mm pass), what can be the maximum speed rate of cutting and spindle speed of router?

The best way to determine the cutting speed is to determine this with respect to the edge quality you desire. This recommendation generally comes from the major end mill manufacturers.

The feedrate (travel speed) should be determined by the chip load of the end mill, the number of flutes, material of the end mill (Solid Carbide, HSS - High Speed Steel, Cobalt, etc.) and the RPM of the spindle. You will need to see the manufacturer's specifications of the end mill to determine this information.

Formula:
Chip Load = (feed rate IPM)/(Spindle RPM x Number of Flutes)

or

Feed Rate IPM = Chip Load x Spindle RPM x Number of Flutes

Once you find this information, apply this to the material at the full depth of the end mill. If you find that your edge condition is aberrant, pull back on either the speed, or the depth per pass. If the edge condition is acceptable, then push the speed higher until the edge condition starts to deteriorate in quality and then pull back to the accepted level.

Using this method, you will be able to reduce the wear on the end mil which will be the most expensive consumable on the machine.

If I am cutting 18mm MDF with 6mm cutting bit (so 6mm pass), what can be the maximum speed rate of cutting and spindle speed of router?

• Can you ship the parts to India without having an end user to deal with the customs?

We follow all regulations in regards to international shipments. The only way to avoid dealing with customs would be to hire a local courier to handle the process for you.

Can you ship the parts to India without having an end user to deal with the customs?

• can I control the speed of a 2.2 spindle through your 5 axis breakout board with relay?

Yes, you can control the speed of the 2.2 kW spindle, and the other spindles we sell, through Mach3 software. It requires making some changes to the settings in Mach3 and in your inverter. It also requires an additional part, which is called a USB to Serial Converter, found on our site here:

https://www.buildyourcnc.com/item/Interfaces-newbiehack-Interfaces-TTL232R-USB-UART-Serial

I have some additional instructions, that I will send upon request, by email. I will also be adding a complete tutorial and video, to the website, on how to do this soon.

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can I control the speed of a 2.2 spindle through your 5 axis breakout board with relay?

• Can I increase the travel speed of my machine with different lead screws?

Changing your lead screws from a tight to a lose lead will definitely make your machine move faster as long as your stepper motors can handle the new torque that the lead screws will impose.

Here is an example of a speed change from one lead screw to another:
- Existing constants in the example: Stepper Motor steps 200, microstepping 1/8 making the total steps 200 * 8 = 1600.
- New Lead Screw: 1/2" 5 starts, 10 TPI = 10 / 5 = 2 turns per inch

Old lead screw would achieve a steps per inch of:
1600 / (1 inch / 13 turns) = 20,800 steps per inch (You can also express the calculation as 1600 * 13 = 20,800 steps/inch)

New lead screw would achieve a steps per inch of:
1600 / (1 inch / 2 turns) = 3200 steps per inch

You can see that the new lead screw requires far fewer steps to get to the same length of travel. If you maintained the same velocity for both examples, the new lead screw would travel the same distance 13/2 = 6.5 times faster. So, if your velocity was say 10 ipm, your new velocity would be 65 ipm. That would translate to far fewer burned edges and longer end mill life!

Just remember, confirm that your motors will be able to handle the new lead screw. You will need to reduce the steps/inch causing the motor torque to increase quite a bit, so you should be fine.

Can I increase the travel speed of my machine with different lead screws?

• I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

We recommend checking the dip switch settings on your drivers, having the correct microstepping/amp settings along with the steps/unit will help the motors run as effective as possible.
This is a default parameter that we use while we test our motors:
Driver dip switch settings will be at a 1/16 microstepping and 2.7amp (11001100) for x/y-axis and the z-axis will be at 1/4 microstepping and 2.7amp (10101100).

In planet-cnc with increasing the motor speed, you will have to modify the settings in planet-cnc (File/settings/setup) you will modify the initial speed, maximum speed, and the acceleration.
X/Y-axis step/unit: 1422.22 initial speed:500 maximum speed:750 acceleration:25
Z-axis step/unit: 1600 initial speed:100 maximum speed:300 acceleration:25
The initial speed and maximum speed will have to be roughly tested and adjusted per application.
Make sure to adjust the JOG slide bard underneath the axis controls on screen to about 750, to compensate for your x/y-axis adjustments. If left alone the speed will max out at the default setting.

Here is a video tutorial to calculate the steps required depending on your mechanical linear motion components. (

)

I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

• I have a BlueChick that came with the 5-Axis Bread-Out Board V5 (parallel port), it has 3xCW230, how to configure it on LinuxCNC?

Strictly to the point. Assuming:
-You have a working linuxcnc install with a compatible parallel port
-You have wired Bread-Out Board V5 to the motor drivers so you know which pins are for which signals(watch video tutorials for that on this site)
-You have wired motors to motor drivers (watch video tutorials for that on this site)

a)We need to know the base parallel port addres, for that you need to input on a linux terminal the command:

#lspci -v

You can scroll up and down the result with page up and page down. Look for a "Parallel Port..." line, the value you are looking for is the "I/O Ports at.." Write them down

To get the Base Period Maximun Jitter, go to
applications - cnc - Latency Test

Now you should let that window running for a while, so it calculates an accurate jitter, go watch the tutorial videos for the connections between the Bread-Out Board and the motor controllers.

After its been running for half an hour or so with the machine in use, write down the calculated jitter values, mine was Servo Thread - 39000

Now close the Latency test dialog

b)Go to applications - cnc - stepconfwizard
"START" - Create a new config
Check - Create Desktop Shortcut to config files
Check - Create Desktop Shortcut to start linuxcnc with this config
FORWARD

c)"BASE INFORMATION"
Fill in a Machine Name that suits you
Bluechick is XYZ on inches
Fill in the Base Period Maximun Jitter with the value obtained in "a)"

FORWARD

d)If you watched the tutorials on a) and b) you know the pin numbers for your signals.
Parport Base Address you need to put the value obtained in a), mine was cf00
Output pinout presets I used Sherline

FORWARD
FORWARD

e)Axis X (chain and sprocket axis)
Data for bluechick from build yourcnc
Motor Steps per revolution 200
Microstepping 64 (that if you followed tutorials, change if you have different)
Pulley teeth 1 ; 1
Leadscrew Pitch 0.444444 (that value comes from 1rev / (.25 in * 9 teeth))
Maximun Velocity 10
Maximun Acceleration 0.5
Home location 0.0
Table travel 0.0 to 34.0 (maybe you want to change this later)

Now, you can do "Test this axis" and jog it (move it!) Try to position everything in the middle (you will be doing it axis by axis) and select
"+ 0.5 in" Hit run, I used a pencil held at the gantry and paper to draw a line, then confirmed that the measurement was 0.5 in. Also tried with "+/- 0.5 in" and confirmed 1" measurement

FORWARD when happy with your Axis X

Repeat for Axix Y but the table travel is 0.0 to 12.0

f)AXIS Z
With data from buildyourcnc.com
Motor Steps per rev 200
Driver Microstepping 16 (as recommended for lead screw)
Pulley teeth 1 ; 1
Max Vel 2.5
Max Accel 0.5

Table travel 0.0 to 3.5

Test, and FORWARD when happy

g)After configured you can go to
Applications - cnc - LinuxCNC, and there you go...

... Still think that there should be a tutorial for this part.

oh¡ Forgot to tell, the config shortcut will be available on our Desktop, launch linuxCNC from there

I have a BlueChick that came with the 5-Axis Bread-Out Board V5 (parallel port), it has 3xCW230, how to configure it on LinuxCNC?

• I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote

We currently do not have that application implemented in our design. please suggest this in our R/D section (http://buildyourcnc.com/ResDev.aspx).

I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote

• I purachased a bluechick from you in 2011. I am upgrading from a Porter-cable router to a 2.2kw spindle. Can you supply me with drawings for the spindle mount so that I can cut the parts?

We currently cannot release or sell any plans at this current moment! We apologize for this inconvenience, however if you email us at customerservice@buildyourcnc.com. We can help you get the current parts you will need, for a fully functional 2.2kW z-axis assembly.

I purachased a bluechick from you in 2011. I am upgrading from a Porter-cable router to a 2.2kw spindle. Can you supply me with drawings for the spindle mount so that I can cut the parts?

• I have a blueChick version 4.2 CNC Machine with no schematics for it is there anyway possibly i can get them so i can finish putting my cnc together

To assemble the blueChick v4.2, you will need two sets of instructions, the assembly instructions for the main body and mechanicals of the CNC machine, and the instructions to connect and test all of the electronics.

The assembly instructions are located at this URL towards the bottom of the page (click on each picture to get a larger view):

https://www.buildyourcnc.com/blueChickVersion42CNCMachineKit.aspx

The instructions to connect and test the electronics can be found at this URL:

https://www.buildyourcnc.com/CNCElectronicsandWiring.aspx

I have a blueChick version 4.2 CNC Machine with no schematics for it is there anyway possibly i can get them so i can finish putting my cnc together

• I need technical support for your Bluechick CNC and I can't get a reponse on the phone.

You may have called outside of our business hours. Give this "Customer Service Live" mechanism a try and ask away. If you would still rather call us, please call between 9:00am and 5:00 pm Central Time.

I need technical support for your Bluechick CNC and I can't get a reponse on the phone.

• I'm not sure I understand the pricing correctly. How much would a computer and a bluechick?

The price for the blueChick is here: https://www.buildyourcnc.com/blueChickVersion42CNCMachineKit.aspx

You will want the kit without electronics that will cost \$1360.00.

Then you will need either the redSprout, or redLeaf CNC computer systems and the prices can be found here: https://www.buildyourcnc.com/AssembledElectronics.aspx

The redLeaf has a bit more power and speed than the redSprout. You will need to purchase windows, found on that page, if you desire that OS to be installed. Otherwise, we will install Linux and linuxcnc. You will also need to purchase the length of motor wire that you need from the motors to the computer. This is variable and is determined by the position you wish locate the computer system with respect to the CNC machine.

The shipping is determined at checkout. When you have the items in your cart, enter your shipping information and click on "calculate shipping". You will need to select your shipping preference, service and carrier.

I'm not sure I understand the pricing correctly. How much would a computer and a bluechick?

• I get random e-stop while machining. I checked the connections on the redfly and they are OK

You can increase the debouncing for the input terminals where the limit and e-stop switches are connected. Go to Mach3 and the config menu. Click on General Config... in the config menu. The General Logic Configuration dialog box will appear. On the top right of that screen, you will see Debounce Interval. Increase this number until the problem stops.

You might also want to check your wiring. You don't want the limit switch wiring close to any motor wires, including the spindle cable. The limit switch cabling should be shielded and the shielding of the cable should be grounded.

I get random e-stop while machining. I checked the connections on the redfly and they are OK

• Using your NEMA 24 stepping motor with microstepping, can I get a speed range from 3 RPM to 600 RPM ?
• Since I am using normal all-thread lead screw 13 TPI 1/2" for the book build cnc, what can be the maximum feed rate of machine and how can I change the mechanical setup in mach 3? I am using 1/4" steel carbile endmill with 2 flutes and router is 2 HP with variable speed

Book build (scratch build), feedrates and recommendation.

Using standard allthread will provide around 20-30 ipm using 36 volts. Although it allows for a working CNC machine, the RPM of the spindle/router will need to spin at the lowest setting to provide the beat efficiency and life for the end mill at 1/4" cut diameter and higher. The speeds may be fine for smaller end mills.

If you would like faster speeds, you should change the lead screws on the CNC machine to the 1/2" 5 start 10 TPI which translates to 2 turns per inch which means, the stepping motor will not need to turn as fast to produce faster motion. That is to say, the stepping motor will only need to turn two revolutions for the machine to travel one inch and with the allthread, the stepping motor will need to turn 13 times to reach one inch.

https://www.buildyourcnc.com/CNCMachineMechanicalParts.aspx

To change the lead screws you will need (for each axis):

1. The lead screw for that axis.
2. Two 1/2" collars to keep the lead screw axially stable.
3. One Antibacklash nut.

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• If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

The blueChick v4.2, is accurate at 1000's of an inch, with the roller chain, the v3.0 with the timing belt will increase the accuracy by 5%-10%, but to the expense of structural integrity.

If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

• Can I purchase the wood pieces of the GreenBull 6x without any hardware (all gantry "Y", all "Z", and "X" chain end supports)?

That option is not a common request for our machines, we will need to contact you further with specifications on that request for the greenBull.

Email: customerservice@buildyourcnc.com

Can I purchase the wood pieces of the GreenBull 6x without any hardware (all gantry "Y", all "Z", and "X" chain end supports)?

• What do I do if I didnt recieve the y-axis rails, z-axis rails, or the roller chain for my bluechick (rollerchain)?

What do I do if I didnt recieve the y-axis rails, z-axis rails, or the roller chain for my bluechick (rollerchain)?

• I HAVE NEMA 34 MOTORS BUT NEED THE ELECTRICAL COMPONENTS DO YOU A KIT WITHOUT INCLUDED?

If you are looking for the drivers to pair with NEMA 34 stepper motors, you can find the 6.0 amp drivers here:
https://www.buildyourcnc.com/item/electronicsAndMotors-stepper-driver-6!0a

The other electronics to send the signals to the 6.0 amp drivers (the control board that operates with the control software) is subject to personal preference, but here they are listed:

Our breakout board (works with Mach3 and LinuxCNC and requires a parallel port on your computer):
https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay

The PoKeys57CNC (works with Mach3 and Mach4):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

Generic USB breakout board (works with Mach3):
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

Do I need a driver for every motor or can I use one driver for all four motors

Each motor needs its own driver.

I HAVE NEMA 34 MOTORS BUT NEED THE ELECTRICAL COMPONENTS DO YOU A KIT WITHOUT INCLUDED?

• You can set the Index input with Mach3 Turn and check that the Index is lit on the screen, but it is not reflected in the rotation speed. Is there any way?

Yes, you will need a sensor to determine the speed of the rotation. For instance, you can use a hall effect sensor and put a magnet on the shaft of rotation. By installing the hall effect sensor near the shaft that contains the magnet, you can use this to determine the RPM of the axis and reflect this value in Mach3 using an input in your controller and setting that input in the index line item of the Mach3 input signals dialog box.

Here is a great video that shows the circuit and process:

&t=300s

You can set the Index input with Mach3 Turn and check that the Index is lit on the screen, but it is not reflected in the rotation speed. Is there any way?

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