Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
Like you guys, I'm interested in using some of these inexpensive encoders. Compared to industrial units, they are a fraction of the price. The casing and wiring is obviously not industrial Nema 12 etc, in nature - no oilproof military connector on the side of the encoder and no bearings... So how do you guys get around these issues?Fashion some type of cover over the back of the motors and run the cable through a grommet? How could you use one of these encoders for a spindle encoder? Make up a two bearing support system with a stub shaft that the encoder can hang off of? I haven't heard much about US Digital's cheap encoders. What about Renco encoders? Is the consensus that those are ok? Dave On 3/4/2010 6:53 PM, Kirk Wallace wrote: On Thu, 2010-03-04 at 15:13 -0700, John Harris wrote: Hi Kirk, Try Samtec at http://www.samtec.com/documents/webfiles/pdf/FTSH_TH.PDF They only do dual row headers, and they also do ribbon cable connectors to match. You can get free samples if you find your way to their Sudden Service page. I f you can tell me exactly the row and pin count, with SMT or through hole, I may be able to give you the exact part number. Their catalog and web site are tough unless you know your way. John Thanks John. The encoder has a single row of five pins, or as Lawrence noted blades. This connector seems to be the mate for the encoder: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=WM1723-ND I'll give your link a look. -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
Dave wrote: Like you guys, I'm interested in using some of these inexpensive encoders. Compared to industrial units, they are a fraction of the price. The casing and wiring is obviously not industrial Nema 12 etc, in nature - no oilproof military connector on the side of the encoder and no bearings... For the CUI encoder, the motor's bearings are the encoder's bearings. There have been kit encoders for years that work this way. So how do you guys get around these issues?Fashion some type of cover over the back of the motors and run the cable through a grommet? How could you use one of these encoders for a spindle encoder? Make up a two bearing support system with a stub shaft that the encoder can hang off of? That is how you would do it. I haven't heard much about US Digital's cheap encoders. What about Renco encoders? Is the consensus that those are ok? Renco's encoders are fine, and are used inside many name brand motors, such as GL, SEM, Servo Dynamics, etc. They were the first to integrate commutation tracks wth ABZ for brushless motors. They were just bought out by somebody, and their web site was in some disarray and offline for a while. It is now back, and has data on their old models, too. I'd avoid US Digital's economy line. Enough problems have been reported related to noise sensitivity that you just don't need to get into that trouble. Jon -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
On Fri, 2010-03-05 at 10:23 -0500, Dave wrote: Like you guys, I'm interested in using some of these inexpensive encoders. Compared to industrial units, they are a fraction of the price. The casing and wiring is obviously not industrial Nema 12 etc, in nature - no oilproof military connector on the side of the encoder and no bearings... So how do you guys get around these issues?Fashion some type of cover over the back of the motors and run the cable through a grommet? Maybe this? http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=APC1069-ND How could you use one of these encoders for a spindle encoder? Make up a two bearing support system with a stub shaft that the encoder can hang off of? I haven't heard much about US Digital's cheap encoders. What about Renco encoders? Is the consensus that those are ok? Dave I think the cheap way to use U. S. Digital encoders is to make your own from their hubs and sensors, which I did for my lathe: http://www.wallacecompany.com/cnc_lathe/HNC/00011-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/1-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/4-1a.jpg For the axes encoders I made round Delrin covers with an o-ring seal. Then used pressed in brass inserts through the cover for screw terminals. I should install shaft seals, but I haven't gotten round2it. My plan for the AEAT's may be similar. The sensor boards have two tiny plastic pins that are staked to fasten the board. A hot soldering iron tip could soften the staking, and the board pushed out. http://www.wallacecompany.com/machine_shop/EMC2/absolute_encoder/dcp_6877-1a.jpg A shaft, bearings and housing would need to be designed with magnetic fields in mind. Using a screw terminal block on an o-ring sealed circuit board might be a way to go. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=A98336-ND or add a few more terminals and place a differential driver chip on the inside of the board. An SSI hal component is in the works too, unless someone has one already? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
On Fri, 2010-03-05 at 12:27 -0600, Jon Elson wrote: ... snip I'd avoid US Digital's economy line. Enough problems have been reported related to noise sensitivity that you just don't need to get into that trouble. Jon I would not have had any trouble with mine, if I had followed normal noise reduction practices. Others, of course, may have had different results. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
Interesting Kirk, Thanks for the ideas. Considering that new industrial Nema 12 type encoders can easily hit $500-600 each this is something to think about. Dave On 3/5/2010 2:08 PM, Kirk Wallace wrote: On Fri, 2010-03-05 at 10:23 -0500, Dave wrote: Like you guys, I'm interested in using some of these inexpensive encoders. Compared to industrial units, they are a fraction of the price. The casing and wiring is obviously not industrial Nema 12 etc, in nature - no oilproof military connector on the side of the encoder and no bearings... So how do you guys get around these issues?Fashion some type of cover over the back of the motors and run the cable through a grommet? Maybe this? http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=APC1069-ND How could you use one of these encoders for a spindle encoder? Make up a two bearing support system with a stub shaft that the encoder can hang off of? I haven't heard much about US Digital's cheap encoders. What about Renco encoders? Is the consensus that those are ok? Dave I think the cheap way to use U. S. Digital encoders is to make your own from their hubs and sensors, which I did for my lathe: http://www.wallacecompany.com/cnc_lathe/HNC/00011-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/1-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/4-1a.jpg For the axes encoders I made round Delrin covers with an o-ring seal. Then used pressed in brass inserts through the cover for screw terminals. I should install shaft seals, but I haven't gotten round2it. My plan for the AEAT's may be similar. The sensor boards have two tiny plastic pins that are staked to fasten the board. A hot soldering iron tip could soften the staking, and the board pushed out. http://www.wallacecompany.com/machine_shop/EMC2/absolute_encoder/dcp_6877-1a.jpg A shaft, bearings and housing would need to be designed with magnetic fields in mind. Using a screw terminal block on an o-ring sealed circuit board might be a way to go. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=A98336-ND or add a few more terminals and place a differential driver chip on the inside of the board. An SSI hal component is in the works too, unless someone has one already? -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
I really liked browsing through your website. The furnace was nice! I have the holy fear working with propane, so I ask; Did you ever consider using a large TIG welder to create a small Arc oven? The Duty cycle on a Transformer Miller Tig seems to be good enough. or Do you know of someone who does this. It would be great info for me as my Syncrowave Tigs are replaced by (way better) HTP Tigs and I can make use of them for other purposes. L Venter Kirk Wallace wrote: On Fri, 2010-03-05 at 12:27 -0600, Jon Elson wrote: ... snip I'd avoid US Digital's economy line. Enough problems have been reported related to noise sensitivity that you just don't need to get into that trouble. Jon I would not have had any trouble with mine, if I had followed normal noise reduction practices. Others, of course, may have had different results. -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Absolute Encoder Connector - now encoders in general....
On Fri, 2010-03-05 at 15:14 -0500, ad...@mmri.us wrote: I really liked browsing through your website. The furnace was nice! I need to melt cast iron, but so far I've only done aluminum. It turns out the homemade refractory I used will melt at iron casting temperatures. So I need to make a new furnace. I have the holy fear working with propane, With practice, I'm finding it becoming much more predicable. I am missing some forearm hair, but my eye brows are fine. http://www.youtube.com/watch?v=u5-xS9sDuLg Propane is interesting, I think because the molecule is short, so the flame is short. My guess is the short flame causes a fairly tight pressure wave that can feed back to the regulator causing an unstable feedback. On propane only, the burner has a bit of a pulse jet sound and can be hard to keep lit. I put a flare and reducer on my propane only burner to get more of a de Laval nozzle http://en.wikipedia.org/wiki/De_Laval_nozzle This helped a lot, I think because the pressure wave is directed to the output side of the burner. I need to do the same for the oil burner. The oil has a much longer flame with a bunch more heat, but needs to be vaporized before it will burn. Currently, I run the propane at idle to get just enough of a flame to vaporize the oil, but the oil does the heavy lifting. Eventually, the walls of the furnace glow orange and I can turn the propane off, but by then the aluminum has been melted and poured. so I ask; Did you ever consider using a large TIG welder to create a small Arc oven? The Duty cycle on a Transformer Miller Tig seems to be good enough. or Do you know of someone who does this. It would be great info for me as my Syncrowave Tigs are replaced by (way better) HTP Tigs and I can make use of them for other purposes. L Venter http://www.youtube.com/watch?v=-6NJuctYgxA http://www.youtube.com/watch?v=hF8sGrdzE3o http://www.youtube.com/watch?v=G43rIx0d5aY I think my Hobart could be useful for an arc furnace, but I've got a bunch of waste oil, and more free oil is coming. I will need to plant a bunch of trees to offset my carbon footprint, but I think trees are pretty huggable, so that's okay. It would be fun to try to melt some cast iron in crucible, but I need to find a source for a crucible that can take the heat. One plan is to, get some Mizzou and cast my own crucibles. http://www.empire-refractory.com/catalog/mizzou-castable-plus.htm but I need to find a local vendor. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
