CGP-115
Summary
ALPS plotter pens, gears, paper
- Brian K. White b.kenyon.w@gmail.com
ALPS Plotter Engine
The Tandy CGP-115 is based on the same ALPS DPG-1302 plotter engine as several other plotters.
Plotter Models:
- ALPS DPG-1302
- Astron MCP-40X
- Atari 1020
- Canon X-710
- Casio FA-10
- Casio FA-11
- Commodore 1520
- Mattel Aquarius 4615
- MCP-40 (not the Oric one)
- Olivetti PL 10
- Oric MCP-40
- Sega SP-400
- Sharp CE-1600P
- Sharp MZ-1P01
- Sharp MZ-1P16
- Silver Reed EB50
- Tandy CGP-115
- Texas Instruments HX-1000
- Vtech Laser PP-40I
There is another ALPS engine that takes narrower paper, but is otherwise the same, using the same pens and pinion gears.
- Sharp CE-150
- Tandy 26-3605
Pens
lass-shop.de
Search box: "stifte" ("pen" in German)
There are two part number you can order. One is a pack of 4 black pens, one is a pack of one each of 4 colors.
- US 016.01 - 4 black
- US 017.01 - 4 color, black blue green red
Web shop does not handle US shipping address. Order by email to:
- Peter at info@lass-hno.de
Peter speaks English, you can write the email in English.
They will make an invoice / request for payment via PayPal.
Gears
The pinion/spindle gears on the X and Y motors are made of Nylon, which has shrunk over time, and essentially all of these gears are split by now, or soon will be. There is at least one good working replacement. The new gear is brass instead of nylon, which is not necessarily a great thing, but they are the right dimensions and teeth size and teeth count, modulus, bore hole, etc. It's practically a miracle to find these.
Specs
- 13 tooth
- 1.5mm bore
- 0.25 modulus
Sources
WOW! Now you can get brand new gears 3d-printed to order!
Bam! Done!
I have ordered and received a set of these, and they do look and feel good. I haven't installed them in a plotter yet.
Alternative, these gears are brass, and actually cheaper, but, as best I can tell they are not really in production any more, merely some resellers simply still have stock. I actually got several of these from 2 different resellers for about $1.90 per gear.
Manufacturer: Xtreme Production
- Model: EA-055-13
- Motor Pinion 13T (1.5mm hole, 0.25M)
- http://www.xtreme-production.com/xtreme/index.php?main_page=product_info&cPath=159_307&products_id=3013
- Notes: "Suitable for Walkera CB100, 4#6, 4G6, V100, V120 series"
Many resellers list the part, but most don't actually have any in stock. I had success at http://rcparty.com and http://miracle-mart.com.
http://www.miracle-mart.com/store/index.php?main_page=product_info&cPath=83_216&products_id=6842
There may be others still out there. Look for r/c hobby shops, particularly ones that sell helecopters, particularly Walkera.
I used a small hobbyist table top vise to press the gears onto the motor shafts. Panavise 301, with plastic jaws. You can remove a thin metal sheet that covers the motors on the back, and that exposes the motors enough to get the corners of the vise jaws on both ends of the motor shaft without having to remove the motors. The jaws on that model are plastic, so they don't harm the motor shaft on the back of the motors. If you use a steel jaw vice, be sure to protect the rear motor shaft from direct metal to metal contact with the vice jaw.
Paper
Specs
- plain bond
- 4.5" wide
- 7/16" core
- up to 3" diameter
- 160 feet
Original Radio Shack item was 180 feet but that's not a common size. The Original paper may have been a thinner bond too. 160 feet of plain bond does fit in the machine with room to spare. Often the selling sites will list the roll diameter which removes all guessing.
Typical search term: "4.5" bond roll"
http://www.itplanet.com/parts/Star__87999850.htm
https://www.cibowares.com/4-5-x-160-white-bond-1-ply-register-roll-package-of-20/
http://www.sunshinesupport.com/prod/receipt-paper-rolls/1-ply-45-inch-x-165-paper-25-rolls-45165.htm
Refilling Pens
The new pens from the German medical supplies company are pretty expensive considering that they are so small and don’t last very long.
The new pens can be refilled fairly easily with insulin syringes available from local drug stores. Example:
- Walgreens item 677232
- 10-pack, 29 gauge, 0.3mL
- super thin syringes for insulin
When looking for alternative inks, you need to know that the original ink is water-based.
Use water based drafting/plotter pen ink. Example:
- Chartpak/Koh-I-Noor models
- 3080-F-BLA black
- 3080-F-BLU blue
- 3080-F-RED red
- 3080-F-GRE green
Clean up with a calligraphy pen cleaning solution, like:
or Koh-I-Noor Rapido-Eze.
It works to clean up old dried pens too if you soak the disassembled parts in a jar for a day or so.
Fill a syringe to about the 20 mark. (0.2ml)
Around the tip of the pen (the new plastic german ones) there are 3 vent holes. Insert the syringe into one of those. Angle towards the center a little to minimize how much the vent passage gets mushed open by the needle.
Slowly, giving the ink time to soak into the fiber filler inside, push the plunger from about 20 to about 10. When you see ink in the other vent holes, you’ve actually gone slightly too far, or too fast.
Put the printer in 80 column mode ( jumper 2 = off ) and LLIST a basic program until the writing looks clean. It may splatter a little at first.
I have no idea how many times a pen can be refilled before the ball point wears out, but even once is worth it, considering how expensive they are and how quickly they run out. I have only refilled each color about twice so far.
For the original steel barrel pens:
You have to completely disassemble the pens and soak the parts in the cleaning solution for a few hours, or even days.
If the metal ball point still does not roll or flow, try passing the tip into a flame briefly to free up the ball from being stuck. This is just for METAL tips! It melts the dried ink and/or expands the brass nib that holds the steel ball. It only takes a brief exposure, less than a second. Just pass it above a flame back and forth once or twice, don't hold it in place. This breaks the ball free and allows the ball to roll again, and the ink to flow again.
You have to inject ink with the pen tip off. You can’t go in through a vent hole like you can for the new all plastic pens.
All in all, I’ve generally had less than 50% success rate refilling and reviving old pens. Even after completely disassembling and cleaning all parts and freeing the stuck ball points. But occasionally it does work, and a few pens are better than no pens.
Pen/Ink Storage
Store pens and ink in something that is more vapor-proof than oridinary plastic bags or boxes. You want metal or glass, like glass jars with metal lids or foil bags with actual aluminum foil not merely a silvery appearance.
The plastic ink bottles and pen bodies will lose both alcohol and water right through the plastic over time. If they are stored in ordinary plastic bags or containers, even with seals, the vapor pases right through that plastic over time the same way. So you want to store them inside something that will actually trap the vapor inside over long periods, which slows down the loss of volotiles from the ink. Metal in particular also protects the dye from UV.
Example: https://www.amazon.com/dp/B006L80T2O/
This item comes with dessicant packs. Do NOT include the dessicant packs! The whole point is to keep the moisture trapped IN the bag.
Pics / Video
https://goo.gl/photos/8HNKcnyMKBJupYnq9
Manual, BASIC programs
https://drive.google.com/open?id=0Bys6eLbSbYyhSUpfQVdWc2VrdTA