mdf rose engine lathe 2

MDF Rose Engine Lathe 2.0 with Stepper Motor Drive

Machined Parts for the

Base & Headstock

Version 1.0 23 March 2021

MDF Rose Engine Lathe 2.0 Machined Parts for the Base & Headstock

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This document is intended to help one unfamiliar with the MDF rose engine to build one easily. It is designed to go with the kit you can purchase from www.ColvinTools.com. There are some variations from the ideas documented by Jon Magill at www.rogueturner.com. Where this is the case, we have tried to document such changes and provide the reason for the change. This document is also designed to use a stepper motor for driving the spindle. If you have any questions, please contact us at [email protected]. Good luck and we hope you enjoy this machine as much as we. Rich Colvin & Jack Zimmel


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Table of Contents

Getting Started ............................................................................................................................................................................... 4 Accuracy ................................................................................................................................................................................................ 4

Spindle Shaft ................................................................................................................................................................................... 5

Spindle Flange ................................................................................................................................................................................ 6

Stepper Pulley ................................................................................................................................................................................ 7

Bungee Block .................................................................................................................................................................................. 8

Bungee Button ................................................................................................................................................................................ 9

Rear Stop Block ............................................................................................................................................................................. 10

Fading Wedge ............................................................................................................................................................................... 11

Double Rubbers ............................................................................................................................................................................ 12

Stepper Motor Mount Bracket ...................................................................................................................................................... 14


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Getting Started As you get started with building this machine, please consider making the machine exactly according to the outlined instructions. There are lots of ways you can modify this, and, quite frankly, the MDF rose engine encourages experimentation. But it is best to attempt those modifications after understanding how it works. Some ideas which sound grand may not appear so after understanding how the machine works (we speak from experience). If you have any questions on the terminology in this document, check out the “Ornamental Turning Book of Knowledge” (www.OTBoK.info). Accuracy When making the MDF Rose Engine 2.0, these parts must be made quite accurately.


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Spindle Shaft This is the spindle shaft from the original MDF Rose Engine Lathe. The MDF Rose Engine Lathe 2.0 has a spindle with a Morse taper.

— 7 — © Copyright 2007, All rights reserved


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Spindle Flange

— 8 — © Copyright 2007, All rights reserved


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Stepper Pulley

File for 3D printing at https://github.com/elfren/RoseEngine_SpindleAndAxis/tree/master/Hardware/GT2-5mm-108t.

Material: 3/4" HDPE

The factors of 108 are: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108 ==> 12:108 = 9:1

MDF Stepper Pulley108T GT- 2- 5mmv1 7- 8- 15

108T


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Bungee Block

Bungee Blockv1 5-17-20

Material: Suitable hardwood

Notes:- 1/4" hole for through hex head bolt into t-track- 5/32" through holes for 1/8" bungee cord- 1/16" x 15/64" boss on bottom to slide in t-track


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Bungee Button

Bungee Buttonv1 5-17-20

Material: 3/4" diameter HDPE rod or equal


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Rear Stop Block

Rear Stop Blockv2 5-17-20

Material: Suitable hardwood

Notes:- Made from strip of 1 1/4" x 3/8" stock- Glue and pin nail strips, then cut to length


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Fading Wedge

Fading Wedgev1 5-17-20

Material: 3/4" thick MDF, or equal


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Double Rubbers

Bottom Top

v5 5-2-16Double Rubber Layout

Bearing: Industry R2, 0.375" OD, 0.125" ID, 0.15625" Wide, plus 2 shaft shims 0.010"+/-Bearings meansure 0.1550", with 2 shims 0.1760", allowed 0.184", so 0.004 each side +/-


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Page 1 of 2

Double Rubber Parts_v3 11/14/20, 2:59 PM

Double Rubber Parts for MDF Rose Engine “Double Rubber Kit”- v1 — 6-19-15- v2 - 8-3-15- v3 - 11-14-20 - updated comments for Rich Colvin, Jack Zimmel

One “Double Rubber” kit consists of:

- 2 rubbers made up from: - Anodized aluminum rubber bodies x2 - Bearings x2 - Shaft shims x4 - Dowel pins x2

- 2 long thumbscrews - now replaced by a pre-assembled part, see below - 1/4”-20 x 1.5”L SHCS x2 - Pressed on knobs x2

- 1 spindle shim (no longer needed with update, see below)

Components required to make Double Rubber “kits”:

Rubbers- Raw material — 6061 aluminum 3/4” x 3/4” rectangular bar (or 5/8” x 3/4” if available)- Finished part is 4” long, so rough cut allowance of 4-1/4”, minus kerf, figure 4-1/2”- Yield from:

6’ stick = 16 pieces, or 8 kits12’ stick = 32 pieces, or 16 kits (normal aluminum stick

length)20’ stick = 53 pieces, or 26 kits

Dowel pins — (Note: each batch has to be mic’ed to select slightly undersized pins)- 1/8” dia. x 7/16” long- Alloy Steel Dowel Pin, 1/8" Diameter, 7/16" Length- McMaster-Carr part #98381A218 $13.95 per pack of 100 as of 11-14-20

Bearings- Industry size R2-2Z, double shielded, for 1/8” shaft & 3/8” OD, 5/32” wide- Steel Ball Bearing, ABEC-1, Double Shielded, R2 for 1/8" Shaft Diameter, 3/8" OD- McMaster-Carr part: #60355K41, $6.56 Each as of 11-14-20

Shaft Shims for Bearings- For shaft size 0.125” x 0.010” thick


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Stepper Motor Mount Bracket Off-the-shelf Parts: 4 - #8-32 x 3/8" screws (Phillips or BHCS) for NEMA 23 motor 2 - 1/4"-20 x 2-1/2" Hex head bolts 3 - 1/4" washers, 2 for plate and 1 for idler 1 - 1/4"-20 x 5/8" FH hex drive screw 1 - 1/4"-20 x 3/8" BHCS 2 - 1/4"-20 dowel nuts for wood (.39" OD x .63" L) McM-C #90835A210 https://www.mcmaster.com/90835A210/ 1 - 12T GT2 5mm pulley with .25" bore, 2 flanges, aluminum, for 9mm wide belt, SDP-SI #A 6A55-012DF0908 http://shop.sdp-si.com/catalog/product/?id=A%206a55-012df0908 2 - 3/8" x 7/8" x 9/32" shielded ball bearings MSC #01377498 https://www.mscdirect.com/product/details/01377498 1 - GT3 5mm pitch, 131T / 655mm long, 9mm wide Timing belt, Misumi #GBN655EV5GT-90 https://us.misumi-ec.com Manufactured Parts: 1 - Stepper Plate - 1/4" thick plate, rough 5-3/4" x 3-1/4" 2 - Stepper plate spacers - 3/4" diameter aluminum rod 1 - Idler shaft - 7/8" diameter steel rod 1 - Idler shaft spacer - 5/8" diameter HDPE rod or similar 1 - Idler body - 1-1/4" diameter HDPE rod or similar


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MDF Stepper Motor Platev4 8-2-20

0.375

5.3675.742

5.2174.375

3.285

4.4493.004

1.840

0.625

0.2451.409

1.5501.690

0.375

1.589

2.854

3.1452.399

R 0.375

R 0.375

R 0.312

R 0.375

R 5.117

R 0.125

R 0.125

R 4.883

Ø 1.56

Ø 0.25Ø 0.25

Ø 0.25 thru

Ø 0.875 pocket

Tap 8-32, 4 places

82° countersink backside

x 0.125 deep

1/4" wide slot

3.166

0.375

For NEMA 23 size stepper motor

Material: 1/4" thick aluminum plate

Stepper Plate Spacers- 2 required, with 1/4" washers and 1/4"-20 x 2-1/2" bolts

Ø 0.75

Ø 0.25

0.74


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MDF Stepper Plate Idler Assemblyv2 8-2-20

Idler Shaft- Steel

Idler Shaft Spacer- HDPE

Idler Body- HDPE

1/4"-20 tap from both ends

Idler Assembly- Use blue Loctite on screws

1/4"

-20

x 5/

8" F

H h

ex

Ste

pper

Pla

te

Idle

r Sha

ft

Idle

r Sha

ft S

pace

r

3/8"

x 7

/8"

x 9/

32"

Bea

ring

Idle

r Bod

y

1/4"

Was

her

1/4"

-20

x 3/

8" B

HC

S

3/8"

x 7

/8"

x 9/

32"

Bea

ring


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To the extent that material may appear to be infringed, we assert that such alleged infringement is permissible under fair use principles in U.S. copyright laws. If you believe material has been used in an unauthorized manner, please contact me at [email protected]. Portions of this document are copyrighted by Jon Magill and are used with his permission. Permission is not granted to manufacture these for sale.

mdf rose engine lathe 2

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