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nice servos from plotter
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Hi guys,
Haven't posted in awhile...been busy this summer with other projects. I just disassembled a HP7550A pen plotter and cut down the carriage to make a lightweight Y axis for a laser engraver. The plotter was all of $15 purchased locally, and includes two very nice pittman servos with encoders. They are pretty small, but actually have quite a bit of power. Of course there are little forces with a flying lens laser engraver, but perhaps they could be used to move a camera for a 3D digitizer or something similar. I am driving them with a Pixie P100 step/dir to analog converter (www.skyko.com) hooked to an Advanced Motion Controls 12A8 brush amplifier (a bit overkill). Here is a quick video of the carriage moving at 2640IPM running on Mach3. The carriage actually takes 4000 steps to move 1 inch, but I have set the step multiply in the Pixie P100 to 4x. With Mach3 outputting a max of around 45khz, this gives me 1000dpi resolution and the 2640IPM travel speed (fairly fast, no?) -Rick |
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BRIAN FOLEY
yea! that is smoking right along...dont put your finger in the way! cul
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brian f. ----- Original Message -----
From: "skykotech" <rick@...> To: <CAD_CAM_EDM_DRO@...> Sent: Thursday, August 31, 2006 10:09 PM Subject: [CAD_CAM_EDM_DRO] nice servos from plotter Hi guys,timg@... Moderator: pentam@... indigo_red@... davemucha@...[Moderators] URL to this group:aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill |
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roboticscnc
--- In CAD_CAM_EDM_DRO@..., "skykotech" <rick@...> wrote:
Hi Rick, I'm thinking about laser engraving plastic labels and possibly lasercutting steel at a later stage as i'm currently paying for both these services. Can you tell me what types of laser I would need and where I could buy them at a reasonable price? I'm in Australia. Thanks, Glen. |
Hi Rick,both these services.buy them at a reasonable price? I'm in Australia.That is such a huge difference in applications. Engraving plastic labels is a 10 to 20 watt job, Cutting steel is a 200+ watt job. 10 to 20 watt lasers can be found new for under $3000 US. 200+ watt lasers are going to be around $20000 to $30000 US. Ebay can be a decent place for laser deals if you know what you are doing. It is also quite easy to buy a rather heavy paperweight on ebay. |
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Andy Wander
Rick:
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I have a 4699A hp plotter that doesn't work, that somebody trash-picked and gave to me. I want to start fooling around with it and see if I can make something useful out of it. Did you have any problems deciphering the wiring to the encoders and the motors?(I assume the motors are just 2 wires, and the encoders are....?) ________________________________________ Andy Wander -----Original Message-----
From: CAD_CAM_EDM_DRO@... [mailto:CAD_CAM_EDM_DRO@...] On Behalf Of skykotech Sent: Thursday, August 31, 2006 10:10 PM To: CAD_CAM_EDM_DRO@... Subject: [CAD_CAM_EDM_DRO] nice servos from plotter Hi guys, Haven't posted in awhile...been busy this summer with other projects. I just disassembled a HP7550A pen plotter and cut down the carriage to make a lightweight Y axis for a laser engraver. The plotter was all of $15 purchased locally, and includes two very nice pittman servos with encoders. They are pretty small, but actually have quite a bit of power. Of course there are little forces with a flying lens laser engraver, but perhaps they could be used to move a camera for a 3D digitizer or something similar. I am driving them with a Pixie P100 step/dir to analog converter (www.skyko.com) hooked to an Advanced Motion Controls 12A8 brush amplifier (a bit overkill). Here is a quick video of the carriage moving at 2640IPM running on Mach3. The carriage actually takes 4000 steps to move 1 inch, but I have set the step multiply in the Pixie P100 to 4x. With Mach3 outputting a max of around 45khz, this gives me 1000dpi resolution and the 2640IPM travel speed (fairly fast, no?) -Rick This communication including any attachments, are intended for the exclusive use of the addressee(s) and contains confidential or copyrighted materials. Duplication, distribution or reproduction is strictly prohibited by law without written permission of Verrex |
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No, I didn't have any problems with the encoder wiring. The ground
pin was easy to find as it was connected to the ground plane and thus all the mounting screws. I guessed that power would be +5 volts, and since there was a pin with a larger trace which was routed to several chips, I assumed that to be power. I guessed on channel A and channel B, and of course got them wrong :-) but that hurts nothing..just swap them. The motor is DC and only has 2 power wires, red and black. Bog simple! What does the 4699A look like? Is it a A size or one of the large D or E size? Rick:picked and gave to me. I want to start fooling around with it and see ifI can make something useful out of it.and the motors?(I assume the motors are just 2 wires, and the encodersare....?) |
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Andy Wander
It's a D-size plotter.
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I am wondering what to do with it, but it is too cool not to use for something. ________________________________________ Andy Wander -----Original Message-----
From: CAD_CAM_EDM_DRO@... [mailto:CAD_CAM_EDM_DRO@...] On Behalf Of skykotech Sent: Friday, September 01, 2006 3:03 PM To: CAD_CAM_EDM_DRO@... Subject: [CAD_CAM_EDM_DRO] Re: nice servos from plotter No, I didn't have any problems with the encoder wiring. The ground pin was easy to find as it was connected to the ground plane and thus all the mounting screws. I guessed that power would be +5 volts, and since there was a pin with a larger trace which was routed to several chips, I assumed that to be power. I guessed on channel A and channel B, and of course got them wrong :-) but that hurts nothing..just swap them. The motor is DC and only has 2 power wires, red and black. Bog simple! What does the 4699A look like? Is it a A size or one of the large D or E size? This communication including any attachments, are intended for the exclusive use of the addressee(s) and contains confidential or copyrighted materials. Duplication, distribution or reproduction is strictly prohibited by law without written permission of Verrex |
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Normally, I just go to the manufacturer's website. Unless the motors
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are truly ancient, they usually have a manual online. The one I had trouble with was manufactured by Oriental Motors under an OEM contract and they refused to tell me any of the specs (the only reason I could think of was that the OEM wanted to lock out end users from repairing their own machines.) Here's a link to a guide about how to figure out a stepper wires. On 9/1/06, Andy Wander <awander@...> wrote:
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No, HERE's the link:
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Time for a weekend of woodworking and barbequed dead things, I think. Later. On 9/1/06, Dennis Schmitz <denschmitz@...> wrote:
Normally, I just go to the manufacturer's website. Unless the motors |
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--- In CAD_CAM_EDM_DRO@..., "Andy Wander" <awander@...> wrote:
On my encoders on my HP plotter, the encoders sensing module is branded with the manufactures name. I don't recall right now, but the whole thing was on a small board with supporting chip to make interfacing pretty easy. Dave |
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