Re: [Emc-users] Small cnc-controlled chuck
2015-07-10 22:06 GMT+03:00 Dave Cole linuxcncro...@gmail.com: They use a variety of a 3 jaw chuck that uses some type of scroll mechanism which is actuated by an external ring which you hold in place. The brand most common around here is Rigid.That setup would not work for accurate metal turning but it might be fine for wood rotary positioning. https://www.ridgid.com/us/en/power-threading-machines They are extremely common and if you can find an older unit you might be able to pick one up cheaply and adapt it. Hello, I was away for a few days, so could not respond. Thank you for the suggestion, I will try to look around for something like this. John, thank you for the suggestion about automated closing/opening of usual manual chuck, I will think about that. Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
If milling between centers would be acceptable, how about using an actuated tailstock and the type of headstock center with aggressive drive dog points built in? Perhaps something like this: http://www.woodworkingarchive.biz/woodturning-techniques/images/1383_8_21-wood-lathe-chucks-drive-dog.jpg Best, Jason On Fri, Jul 10, 2015 at 10:56 AM, Viesturs Lācis viesturs.la...@gmail.com wrote: Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
On 10 Jul 2015, at 18:02, John Kasunich jmkasun...@fastmail.fm wrote: xample, if there is an index pulse on the encoder), you could use a regular lathe chuck (either 3-jaw or 4-jaw self-centering) and rig an auto chuck wrench for it. Short linear slide actuated by a small air cylinder. Or a scroll chuck actuated by a knurled ring. Then a simple brake can be used to hold the ring and operate the chuck. Of use a toothed belt and DC motor if you don't want the chuck to rotate during mounting. -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
Could you use a larger version of a c5 collet and then make a draw tube with a deep groove ball bearing mounted on the opposite end from the collet. This would allow you to attach a stationary fork to the outer race. Have this fork set up over a pivot point with one end attached to the outer race of the bearing and the other end mounted to a spring to hold collet closed (fail safe if power off or lose of air) and a pneumatic cylinder to push the arm in the opposite direction of the spring to open the collet. Similar to the throughout bearing and slave cylinder arangement on a car clutch. The unturned items could be fed through the tube similar to a bar feeder for a lathe. On 15-07-10 08:56 AM, Viesturs Lācis wrote: Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
Does the stock need to feed thru the chuck (like a bar feeder), or will it be individual blanks loaded by the operator? Is the stock round (3-jaw) or square (4-jaw) Googling power lathe chuck will find you lots of chucks that are tightened (with some modest stroke) by a draw-tube, usually controlled by a pneumatic or hydraulic closer. Prices start at $2000 and go up fast. I think they adjust the grip range by removing the upper jaws from the limited-stroke master jaws and re-attaching them further in or out. I'm guessing that this machine will have a CNC controlled rotary axis. If it can do absolute angles (for example, if there is an index pulse on the encoder), you could use a regular lathe chuck (either 3-jaw or 4-jaw self-centering) and rig an auto chuck wrench for it. Short linear slide actuated by a small air cylinder. On the slide, a gearmotor and a square-ended shaft to fit the lathe chuck's key hole. Index the chuck so its key hole is aligned with the slide. Actuate the air cylinder to push the slide in, and slowly rotate the motor/shaft until I microswitch says that the slide is all the way in and the shaft is engaged. Then use the motor to tighten or loosen the chuck. When done, actuate the air cylinder the other way to pull the slide back so the chuck can rotate. John On Fri, Jul 10, 2015, at 11:56 AM, Viesturs Lācis wrote: Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich jmkasun...@fastmail.fm -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
Use a collet chuck with auto closing. I have seen one machine where the wood was pushed through a square driven collet and over a grinding head similar to a swiss lathe. was making fishing floats in balsa Dave Caroline -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Small cnc-controlled chuck
Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
I think that most CNC power 3 jaw chucks are hydraulic. You might be able to find one used and setup an air over hydraulic cylinder to control it so you wouldn't need a running hydraulic power source. If you started with a CNC lathe that had some bad controls you might be a lot further along than starting from scratch. What is not acceptable from a metal turning standpoint (ala accuracy and wear) might be fine from a wood turning standpoint. Dave On 7/10/2015 11:56 AM, Viesturs Lācis wrote: Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
Andy's idea made me think; Take a look at a commercial pipe threading machine. They use a variety of a 3 jaw chuck that uses some type of scroll mechanism which is actuated by an external ring which you hold in place. The brand most common around here is Rigid.That setup would not work for accurate metal turning but it might be fine for wood rotary positioning. https://www.ridgid.com/us/en/power-threading-machines They are extremely common and if you can find an older unit you might be able to pick one up cheaply and adapt it. Dave On 7/10/2015 2:08 PM, Andy Pugh wrote: On 10 Jul 2015, at 18:02, John Kasunich jmkasun...@fastmail.fm wrote: xample, if there is an index pulse on the encoder), you could use a regular lathe chuck (either 3-jaw or 4-jaw self-centering) and rig an auto chuck wrench for it. Short linear slide actuated by a small air cylinder. Or a scroll chuck actuated by a knurled ring. Then a simple brake can be used to hold the ring and operate the chuck. Of use a toothed belt and DC motor if you don't want the chuck to rotate during mounting. -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small cnc-controlled chuck
There are air operated collet drawbars for grinders. My KOLee came w/ a pair of them. SMD On Fri, Jul 10, 2015 at 2:58 PM, Dave Cole linuxcncro...@gmail.com wrote: I think that most CNC power 3 jaw chucks are hydraulic. You might be able to find one used and setup an air over hydraulic cylinder to control it so you wouldn't need a running hydraulic power source. If you started with a CNC lathe that had some bad controls you might be a lot further along than starting from scratch. What is not acceptable from a metal turning standpoint (ala accuracy and wear) might be fine from a wood turning standpoint. Dave On 7/10/2015 11:56 AM, Viesturs Lācis wrote: Hello! I need to build a machine for rotary milling of wood parts. The thing is that customer wants the parts in the rotary head to be swapped automatically, so some kind of cnc-operated chuck is needed. I would appreciate, if somebody could share a link to something like that. Total range of parts to be machined is 13 to 40 mm, but I do understand that operator would have to set up the jaws for particular diameter as the chuck itself would move the jaws for few milimeters only. Is there any simple way to make some diy version that actually works? I was thinking about gripping the part between some rollers, but I do not think that there would be no slipping etc. Any suggestions or hints will be appreciated :) Viesturs -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
